Developer Tools Companies

Cursor (Anysphere)

San Francisco, United States

Cursor, built by Anysphere, is the leading AI-first code editor for pair programming with AI. Raised $2.3B in 2025 at a $29.3B valuation, becoming the fastest-growing dev tool.

Chainguard

Kirkland, United States

Chainguard is a software-supply-chain security company that provides hardened, minimal-vulnerability container images to reduce risk and meet compliance requirements, including for AI and ML workloads. Its catalog has grown to over 1,400 images used by 100+ enterprises. It raised a $356M Series D in 2025 at a $3.5B valuation, with about $612M raised in total.

Vercel

San Francisco, United States

Vercel is a frontend cloud platform providing developers with the infrastructure to build and deploy web applications. Their core offering is an AI Cloud, integrating AI SDKs and edge functions to enable personalized and dynamic web experiences. Vercel targets web developers seeking to leverage AI capabilities directly within their frontend applications, focusing on performance and scalability.

Retool

San Francisco, United States

Retool is a developer platform enabling businesses to rapidly build and deploy custom internal tools. Their core offering is a unified engine that connects to diverse data sources – including databases, APIs, and Large Language Models – with a focus on production-grade reliability. Retool targets organizations seeking to overcome engineering bottlenecks and efficiently create purpose-built software for operational workflows, data management, and AI integration without extensive coding.

Redis

Mountain View, United States

Redis provides a fully-managed, in-memory data platform optimized for real-time applications, including those leveraging artificial intelligence. Their core offering is Redis Stack, which incorporates vector databases and semantic search capabilities to accelerate AI workloads like chatbots and LLM-powered agents. Redis targets developers seeking to reduce latency and infrastructure costs associated with AI applications by providing a high-performance caching and data storage layer.

Auth0 AI

Buenos Aires, Argentina

Auth0 AI, now part of Okta, provides identity and access management solutions enhanced with artificial intelligence. Their platform utilizes AI-driven adaptive authentication and bot detection to secure both human users and AI agents across applications. Targeting developers and organizations building AI-powered applications, Auth0 AI uniquely addresses the growing need for secure access control in environments increasingly reliant on machine interaction.

Periodic Labs

San Francisco, United States

Periodic Labs is building next-generation AI training infrastructure. They raised a massive $300 million seed round led by Felicis and Andreessen Horowitz, one of the largest seed rounds in history.

Augment

Palo Alto, United States

Augment provides an AI coding assistant built for large codebases and engineering teams, offering context-aware completions, chat, and agents that understand an organization's entire repository.

Sauce Labs

San Francisco, United States

Sauce Labs provides a cloud-based platform for automated software testing across web and mobile applications. Their core offering leverages AI-powered “Intelligent Agents” to enhance test coverage, error reporting, and overall software quality at scale. Targeting DevOps and quality assurance teams, Sauce Labs differentiates itself through access to a vast infrastructure of real devices, emulators, and browsers, combined with AI-driven insights to accelerate release cycles and improve digital experiences.

Sourcegraph

San Francisco, United States

Sourcegraph is a code intelligence platform that enables developers and AI agents to efficiently navigate and understand large, complex codebases. Their core technology is a universal code search engine, coupled with tools like Cody, an AI coding assistant designed to operate effectively within extensive and often legacy code environments. Sourcegraph targets enterprise development teams struggling with code complexity and aims to improve both human and AI-driven code comprehension and maintainability at scale.

Replit

San Francisco, United States

Replit is a collaborative, browser-based Integrated Development Environment (IDE) that simplifies software creation and deployment across multiple languages. Its core offering, including features like Ghostwriter, leverages large language models to provide AI-powered code completion, generation, and explanation directly within the IDE. Replit targets a broad range of developers – from students and beginners to professionals – and has gained traction as a platform for educational coding and rapid prototyping, boasting over 3 million users and supporting deployments to various cloud providers.

Sentry

San Francisco, United States

Sentry provides application performance monitoring and error tracking software for software development teams. Their platform utilizes AI-powered error analysis and tracing to pinpoint the root cause of application issues – from specific code commits to slow database queries – across the entire application stack. Targeting DevOps and development teams, Sentry streamlines debugging workflows and facilitates faster issue resolution with integrations for popular development tools like Slack, Jira, GitHub, and more.

BuilderAI

London, United Kingdom

BuilderAI is a UK-based technology company that streamlines custom software development through an AI-powered assembly process. Their core product utilizes generative AI to combine pre-built, tested software components – including UI elements, APIs, and backend functions – into functional applications. This approach targets businesses seeking rapid, cost-effective development of bespoke software solutions without requiring extensive in-house coding expertise.

Mux

San Francisco, United States

Mux is a US-based provider of video infrastructure and APIs that enable developers to seamlessly integrate high-quality live and on-demand video functionality into their applications. Their core technology centers around a robust video processing pipeline and API offering features like rapid video still extraction and customizable playback. Mux targets developers and businesses seeking to efficiently build and scale video experiences without the complexities of managing underlying video infrastructure.

Nylas

San Francisco, United States

Nylas provides a unified API platform enabling developers to integrate email, calendar, and meeting functionality into their applications. Their core technology is a connectivity layer supporting bi-directional data sync with over 250 providers – including Gmail, Microsoft 365, and Zoom – eliminating the need for individual integrations. Nylas targets developers seeking to accelerate the build of communication-driven features, such as scheduling automation or contextual in-app messaging, without the complexities of managing diverse provider APIs.

GoodData

San Francisco, United States

GoodData is a US-based platform provider specializing in embedded, agentic AI for business intelligence. Their composable data intelligence platform enables developers to rapidly build and deploy custom AI applications and automated workflows directly within existing applications. GoodData targets businesses seeking to enhance their offerings with AI-driven insights and automation, particularly those prioritizing developer control and scalable performance.

Poolside

Paris, France

Poolside is a French foundation model company developing AI agents specifically for software development and deployment within enterprise environments. Their core technology focuses on building and operationalizing large language models to enhance developer productivity and automate coding tasks. Unlike many AI providers, Poolside prioritizes data security and control by offering on-premise, VPC, or workstation deployment options, targeting organizations with stringent compliance and security requirements.

Tessl

London, United Kingdom

Tessl develops a platform enabling reliable AI-assisted software development through structured context management for coding agents. Their core product is an “agent enablement platform” functioning as a package manager for agent skills and associated contextual data, offering versioning and evaluation capabilities. Targeting software development teams building AI-native applications, Tessl aims to improve the consistency and maintainability of code generated by AI agents within existing codebases.

Hive

San Francisco, United States

Hive develops AI models and APIs for comprehensive content analysis, specializing in computer vision and natural language processing across text, image, video, and audio data. Their technology delivers granular classification labels for content moderation, brand protection, and contextual advertising, and also powers next-generation search capabilities for large datasets like web images and proprietary content. Hive offers both proprietary and open-source generative AI models, enabling businesses to automatically generate content and is currently utilized by customers for applications ranging from content moderation to intellectual property analysis.

AssemblyAI

San Francisco, United States

AssemblyAI develops highly accurate speech-to-text APIs, including their flagship LeMUR model, and a suite of audio intelligence features like speaker diarization, entity detection, and topic detection. Their key innovation lies in offering low-latency, high-accuracy transcription optimized for real-time and asynchronous applications, alongside advanced features like content moderation and redaction. Serving a diverse market including contact centers, media companies, and research institutions, AssemblyAI processes millions of minutes of audio data monthly and is recognized for consistently achieving industry-leading Word Error Rates (WER) in independent evaluations.

DevRev

Palo Alto, United States

DevRev is an AI-native platform that unifies customer support and product development, using agents to analyze conversations, searches, and session analytics for support engineers, product managers, and developers. Founded by Nutanix co-founder Dheeraj Pandey, it became a unicorn in 2024.

CrewAI

San Francisco, United States

CrewAI develops a platform for building and deploying autonomous teams of AI agents designed to automate complex workflows. Their core technology centers on agentic workflows and provides both a visual editor and API for integration with enterprise applications and tools. The company targets enterprise users seeking to improve operational efficiency through AI-driven automation, and offers an open-source component to facilitate adoption.

Render

San Francisco, United States

Render is a cloud platform specializing in application deployment and scaling for developers. Their core offering is a unified infrastructure enabling users to build, deploy, and manage applications – including those leveraging AI – without managing underlying infrastructure. Render targets developers seeking a streamlined, end-to-end platform for rapid application delivery and scalability, with recent integrations focused on debugging AI applications via tools like Claude Code and Cursor.

Warp

San Francisco, United States

Warp develops a next-generation terminal and agentic development environment enabling developers to build and deploy applications with integrated AI assistance. Its core innovation lies in allowing users to chain together customizable AI “Agents” – powered by models like OpenAI’s GPT – directly within the terminal to automate tasks ranging from code generation and debugging to deployment workflows. With over 500,000 users, Warp is rapidly gaining traction as a productivity tool for software engineers seeking to accelerate their development cycles and leverage AI throughout the entire application lifecycle.

Graphite

New York, United States

Graphite is a developer-tools company bringing AI acceleration and automation to code review, with AI reviewers that surface bugs and a stacked-pull-request workflow used by engineering teams. It serves hundreds of companies including Shopify, Snowflake and Figma.

Codeium

Mountain View, United States

Codeium develops Windsurf, an AI-native integrated development environment (IDE) and coding assistant. Utilizing a proprietary AI model called Cascade, Windsurf provides code completion and contextual awareness across 70+ programming languages. Targeting professional developers and enterprise teams, Codeium aims to enhance coding efficiency and maintain developer workflow through its AI-powered tools.

Tinybird

Madrid, Spain

Tinybird is a real-time data platform that lets developers build data products and analytics APIs at any scale. Processes billions of rows instantly.

Lightning AI

New York, United States

Lightning AI provides a cloud-based platform for the full AI development lifecycle, from coding and prototyping to training, scaling, and serving models. Built by the creators of the open-source PyTorch Lightning framework, their platform simplifies AI development by offering a zero-setup, browser-based environment. Lightning AI targets machine learning engineers and data scientists seeking to accelerate model development and deployment without infrastructure management.

PostHog

San Francisco, United States

PostHog is an open-source product analytics platform with session replay, feature flags, A/B testing, and surveys. Used by 50,000+ companies.

Tabnine

Tel Aviv, Israel

Tabnine develops AI-powered coding assistants, including its core product – a code completion tool available as a cloud-based service and self-hosted option – that integrates with over 50 IDEs and editors. Leveraging deep learning models trained on billions of lines of publicly available, permissively licensed code, Tabnine offers features like whole-line and full-function code completion, as well as AI-powered code suggestions and debugging assistance. Recognized by Gartner as a leading AI assistant for code generation, Tabnine serves enterprise development teams seeking to improve developer velocity while maintaining code privacy and compliance.

Clerk

San Francisco, United States

Clerk provides a complete, full-stack authentication and user management solution for web application developers. Their core offering is a suite of pre-built, customizable UI components and backend infrastructure designed specifically for modern JavaScript frameworks like React, Next.js, and Remix. Clerk targets companies building SaaS products and web applications seeking to rapidly integrate robust user accounts, organization management, and subscription billing without extensive in-house development.

n8n

Berlin, Germany

n8n is an open-source workflow automation platform with native AI capabilities. Enables building AI-powered automations with 400+ integrations and code flexibility.

Builder.io

San Francisco, United States

Builder.io is a visual development platform with AI-powered code generation. Their Visual Copilot converts Figma designs to code, and they build tools for creating performant websites and apps with drag-and-drop editing.

Union.ai

Bellevue, United States

Union.ai is the enterprise platform behind Flyte, the open-source orchestrator for machine learning and data workflows. Its tooling helps teams build, schedule, and scale reproducible AI pipelines on Kubernetes. Flyte has been downloaded over 80 million times.

Braintrust

San Francisco, United States

Braintrust is an enterprise-grade platform for evaluating and improving AI applications. Provides tools for logging, evals, datasets, and prompt playground.

LangChain

San Francisco, United States

LangChain is a US-based developer tools company providing an open-source framework and engineering platform for building applications powered by Large Language Models (LLMs). Their core offering centers on “chains,” “agents,” and memory modules that enable developers to construct complex LLM-based workflows and applications with enhanced observability through their LangSmith tracing tool. LangChain targets AI developers and engineering teams seeking to rapidly prototype, deploy, and monitor reliable LLM applications without vendor lock-in, offering both pre-built architectures and low-level customization options.

Zed

San Francisco, United States

Zed develops a high-performance, multiplayer code editor built with Rust, designed for modern development workflows. Its core AI technology leverages Tree-sitter for precise semantic parsing, enabling advanced code generation and AI-assisted features directly within the editor. Zed targets professional software developers and emphasizes collaborative coding experiences enhanced by integrated AI capabilities.

Datafold

San Francisco, United States

Datafold is a data-engineering automation platform that pairs specialized AI agents for data-platform migration and optimization with a data knowledge graph, automating testing, code review, and large-scale code migrations. Its data-diff tooling detects value-level discrepancies between datasets.

Railway

San Francisco, United States

Railway is a cloud infrastructure platform that simplifies the deployment and scaling of applications, with a specific focus on AI and machine learning workloads. The company provides developers with tools for local development and one-click deployments, abstracting away the complexities of cloud infrastructure management. Railway targets developers seeking to rapidly prototype and scale applications without requiring deep expertise in DevOps or distributed systems.

Locofy

Singapore, Singapore

Locofy is a design-to-code platform that automates the conversion of UI designs from tools like Figma into clean, production-ready React, Next.js, and mobile code. Utilizing a proprietary AI model trained on design patterns and code structures, Locofy accelerates front-end development workflows. Their primary target market is web and mobile development teams seeking to reduce manual coding efforts and improve design-to-deployment velocity.

Exafunction

Mountain View, United States

Exafunction develops Windsurf, an AI-native integrated development environment (IDE) and coding assistant powered by large language models. Windsurf aims to improve developer productivity by providing contextual code completion, remembering codebase specifics, and maintaining workflow continuity. The company targets professional software developers and enterprises seeking to accelerate development cycles and improve code quality through AI-assisted tools.

LiveKit

San Francisco, United States

LiveKit is an open-source platform for building realtime audio and video applications. Powers voice AI agents with ultra-low latency infrastructure.

Botpress

Quebec City, Canada

Botpress is a Canadian company offering an open-source platform for developing and deploying AI agents. Their platform distinguishes itself through a no-code/low-code studio environment and extensive integration capabilities, enabling businesses to automate a wide range of workflows. Botpress targets developers and organizations seeking a flexible, self-hosted solution for building conversational AI applications powered by large language models (LLMs).

Continue

San Francisco, United States

Continue is an open-source AI code assistant platform that integrates into VS Code and JetBrains IDEs. With 20K+ GitHub stars, it allows developers to create custom AI assistants using any model.

LlamaIndex

San Francisco, United States

LlamaIndex provides a data framework and end-to-end agentic workflow platform designed to connect large language models (LLMs) with diverse data sources, including documents and images. Their core innovation lies in delivering highly accurate, OCR-powered document understanding and retrieval, enabling the creation of AI agents for complex tasks like automated document processing and enterprise automation. LlamaIndex targets businesses seeking to build LLM-powered applications requiring reliable data ingestion and contextual understanding from unstructured data, and positions itself as a leading framework for agentic workflows.

Craft AI

Paris, France

Craft AI is a French MLOps provider specializing in pre-built and custom AI applications designed for enterprise deployment. Their platform focuses on data sovereignty and security, keeping data on-premise while offering solutions across departments like marketing, operations, and IT. Craft AI targets organizations seeking to improve efficiency and competitiveness with trustworthy, explainable AI, while also prioritizing cost control and carbon footprint reduction.

Nomic AI

New York, United States

Nomic AI develops a data infrastructure platform that organizes unstructured data sources—like drawings, scans, and specifications—into a knowledge base for AI applications. Their core technology centers on enabling the creation of customized “knowledge agents” trained on a firm’s proprietary data, addressing AI hallucination issues common with generic models. Nomic AI targets Architecture, Engineering, and Construction (AEC) firms seeking to improve efficiency and knowledge retrieval across complex projects.

Durable

Vancouver, Canada

Durable provides an all-in-one platform leveraging generative AI to enable rapid business creation and growth. Their core offering is a no-code application combining AI-powered website building, SEO/GEO tools, and customer relationship management features. Targeting entrepreneurs and small businesses, Durable aims to streamline the process of launching and scaling online ventures, with a focus on speed and accessibility.

Humanloop

London, United Kingdom

Humanloop provides tools for evaluating, improving, and deploying LLM applications. Helps teams ship reliable AI products with prompt management, evaluation, and fine-tuning.

Composio

San Francisco, United States

Composio develops a platform for building autonomous AI agents focused on workflow automation. Their core technology enables “just-in-time” access to APIs and tools – across a network of 1,000+ applications – combined with secure authentication and sandboxed execution environments. Targeting developers, Composio aims to simplify the creation of agents capable of complex, multi-step tasks without requiring pre-defined integrations or broad permissions.

Vapi

San Francisco, United States

Vapi provides a platform for developers to build and deploy configurable voice AI agents. Their core technology is a comprehensive API enabling advanced conversational AI functionality for phone-based applications. Vapi targets a broad market ranging from startups to large enterprises seeking to automate phone operations and create scalable voice AI products.

Supermaven

San Francisco, United States

Supermaven provides the fastest AI code completions with a 1 million token context window. Founded by the creator of Tabnine, it offers ultra-low latency autocomplete that understands your entire codebase.

Speechly

Helsinki, Finland

Speechly is a Finnish company specializing in real-time Automatic Speech Recognition (ASR) technology delivered via a streaming API. Their core product is a cloud-based ASR engine optimized for low-latency transcription and understanding, particularly in demanding applications like real-time communication and interactive voice response systems. Speechly targets developers building voice-enabled applications requiring high accuracy and speed, offering a developer-friendly alternative to traditional, batch-oriented speech-to-text solutions.

Recall.ai

San Francisco, United States

Recall.ai develops APIs and SDKs for extracting high-fidelity audio, transcripts, and metadata from video conferencing platforms. Their core technology focuses on isolating individual speaker audio streams within meetings to improve transcript accuracy and recording quality. The company targets developers building applications requiring detailed meeting intelligence, and differentiates itself through superior audio separation compared to standard screen recording solutions.

Sieve

San Francisco, United States

Sieve provides infrastructure for deploying and scaling video and audio AI. Offers pre-built AI functions and serverless compute for media processing.

Browserbase

San Francisco, United States

Browserbase provides serverless headless browser infrastructure, enabling developers to reliably and scalably integrate web access into AI agents and automated applications. Their core offering is a managed platform compatible with tools like Playwright, eliminating the need for users to maintain browser infrastructure themselves. This positions Browserbase as a cost-effective alternative to solutions like Browserless, targeting developers building AI-powered web applications and automation workflows.

Inngest

San Francisco, United States

Inngest is a workflow orchestration platform for AI and backend engineers. Enables building reliable, event-driven applications with automatic retries.

Reface

Kyiv, Ukraine

Reface develops AI-powered mobile applications, specializing in generative AI technology for hyperrealistic face swapping and content personalization. Beyond its consumer-facing face swap application, the company offers a platform enabling clients to rapidly prototype and validate AI-driven mobile app concepts without requiring extensive coding. Reface targets businesses and entrepreneurs seeking to leverage generative AI for innovative mobile experiences, offering a low-barrier entry point for app development and validation.

Vellum

San Francisco, United States

Vellum is a development platform for building production-ready LLM applications. Provides prompt engineering, evaluation, deployment, and monitoring tools.

All Hands AI

Boston, United States

All Hands AI develops OpenHands, the largest open-source platform for AI-driven software development, providing autonomous coding agents and an SDK for building agentic developer workflows. The MIT-licensed project acts as an AI pair programmer that handles tasks like writing tests, managing dependencies and updating documentation.

Langfuse

Berlin, Germany

Langfuse is an open-source LLM engineering platform for tracing, evaluation, prompt management, and metrics to debug and improve LLM applications.

Not Diamond

San Francisco, United States

Not Diamond is an AI model router that automatically selects the best LLM for each query. Optimizes for quality, cost, and latency across multiple model providers.

Coval

San Francisco, United States

Coval builds automated simulation and evaluation infrastructure for AI voice and chat agents, applying testing methods inspired by the self-driving-car industry. Founded by a former Waymo evaluation-infrastructure lead, it helps engineers validate agent reliability before deployment.

Portkey

San Francisco, United States

Portkey is an AI gateway that helps teams ship reliable, cost-efficient, and fast AI applications. Provides unified API, observability, guardrails, and caching for LLMs.

Trigger.dev

London, United Kingdom

Trigger.dev is a platform for running long-running background jobs with automatic retries and observability. Perfect for AI workflows and data pipelines.

AgentOps

San Francisco, United States

AgentOps provides observability and developer tools for AI agents. Their platform helps teams build, monitor, and debug reliable AI agents at scale with session replays and analytics.

Zindi

Cape Town, South Africa

Zindi operates a competitive platform hosting machine learning challenges sourced from organizations across Africa. Their core offering connects a community of over 100,000 data scientists and AI builders with real-world problem sets, offering prize money and recruitment opportunities as incentives. This model addresses the shortage of skilled AI talent in Africa while providing businesses access to innovative solutions and a pipeline of qualified candidates.

Cognition AI

San Francisco, United States

Cognition (Cognition Labs) created Devin, an autonomous AI software engineer that plans, writes, tests, and ships production code inside a sandboxed environment. Founded 2023 in San Francisco by Scott Wu, Steven Hao, and Walden Yan; it acquired Windsurf in July 2025 and raised a $400M round in September 2025 at a $10.2B valuation.

Modal

New York, United States

Modal provides a serverless cloud platform that lets developers run AI/ML and data workloads (training, batch jobs, inference) without managing infrastructure. In May 2026 it raised a $355M round at a $4.65B valuation, with annual revenue reported around $300M.

DeepSeek

Hangzhou, China

DeepSeek is a China-based AI company developing and releasing open-source large language models (LLMs) focused on coding and general reasoning capabilities. Their product line includes DeepSeek-LLM, DeepSeek-Coder, and the recently released DeepSeek-MoE, utilizing a Mixture-of-Experts architecture for enhanced performance. DeepSeek targets developers and researchers by providing both open-source models and commercial API access to their advanced LLMs.

Booster Robotics creates humanoid robot products, uniting developers globally to drive productivity evolution with developer-friendly tools.

Code Metal

San Francisco, United States

Code Metal accelerates critical industries with provably correct, automated code translation and optimization between programming languages.

GitLab

San Francisco, United States

GitLab provides a comprehensive DevSecOps platform integrating AI-powered features throughout the software development lifecycle. Their core offering, GitLab Duo, utilizes large language models to deliver contextual code suggestions, automated vulnerability detection, and conversational AI assistance directly within the platform. Targeting professional software development teams, GitLab aims to accelerate development velocity and improve code security by embedding AI capabilities into every stage of the process.

Holberton School

San Francisco, United States

Holberton School is a post-secondary institution offering an intensive, project-based computer science education. Their curriculum focuses on foundational CS principles and practical application of technologies like TensorFlow, React, and C, preparing students for roles in software engineering. Targeting career switchers and aspiring developers, Holberton differentiates itself by emphasizing why things work, not just how, and boasts a strong track record of graduate placement at leading tech companies.

Teachable Machine

Mountain View, United States

Teachable Machine is a web-based platform developed by Google that enables users to rapidly create machine learning models using a no-code interface. The platform focuses on image, audio, and pose-based recognition, allowing individuals to train custom models directly within their browser. Primarily targeting educators, artists, and hobbyists, Teachable Machine lowers the barrier to entry for machine learning by eliminating the need for programming expertise and facilitating quick prototyping for integration into web applications and creative projects.

Codacy

Lisbon, Portugal

Codacy provides an automated code-review and quality platform that flags security issues, code smells and style problems across many languages, integrating into developer workflows. Founded in 2012 in Lisbon by Jaime Jorge and João Caxaria; raised about $30M.

Phind

San Francisco, United States

Phind is an AI answer engine for developers, pairing large language models with high-quality web context to deliver code-focused, cited answers. Founded by Michael Royzen and Justin Wei (Y Combinator-backed), it raised $10.4M in late 2025.

Exa

San Francisco, United States

Exa (formerly Metaphor) builds an embeddings-based neural search engine and API designed for AI applications, retrieving web content by semantic meaning for RAG pipelines and agents. Founded in 2021 by Harvard roommates Will Bryk and Jeff Wang, it raised an $85M Series B at a ~$700M valuation.

Lovable

Stockholm, Sweden

Lovable is a Swedish 'vibe coding' platform that lets anyone build full-stack applications through conversational AI, founded in 2023 by Anton Osika. It scaled to roughly $200M ARR by late 2025 and raised $330M in December 2025 at a $6.6B valuation.

Helicone

San Francisco, United States

Helicone is an open-source observability platform for LLM applications. Provides logging, analytics, rate limiting, and caching with one line of code integration.

Greptile

San Francisco, United States

Greptile provides an AI-powered API that understands entire codebases. Enables developers to build code search, documentation, and understanding tools.

Pythagora

San Francisco, United States

Pythagora builds GPT Pilot, an AI coding agent that writes entire applications from scratch. Enables developers to build apps through conversation with AI.

Resend

San Francisco, United States

Resend is a developer-focused email API for sending transactional and marketing email reliably at scale, and is the company behind the popular open-source React Email library. Founded by Zeno Rocha (Y Combinator W23), it raised a $3M seed from YC, SV Angel and notable angels.

Tavily

San Francisco, United States

Tavily provides a search API optimized for AI agents and RAG applications. It delivers clean, LLM-ready search results, helping developers build AI applications that need real-time web information.

Factory

San Francisco, United States

Factory builds AI-powered coding agents, termed “Droids,” that automate software development tasks including coding, testing, and deployment. Their core technology centers on agent-native software development, enabling these agents to function within existing developer tools and CI/CD pipelines without requiring workflow modifications or model integrations. Factory targets both startups and enterprises seeking to accelerate development cycles and automate routine engineering tasks.

Pieces for Developers

Cincinnati, United States

Pieces for Developers provides a local, context-aware AI companion for software developers. Its core technology centers on capturing and managing workstream data – from browsers, IDEs, and collaboration tools – to provide long-term memory and contextual recall for large language models. This differentiates Pieces by offering enhanced developer productivity and data privacy through on-device processing and LLM integration, targeting individual developers and teams prioritizing control over their data.

Raycast

London, United Kingdom

Raycast develops a keyboard-driven launcher and productivity toolkit for macOS and Windows. Its core technology centers on a customizable extension framework enabling integration with developer tools, internal systems, and external APIs – increasingly leveraging large language models for task automation and information retrieval. The company targets professional developers and power users seeking to enhance workflow efficiency through keyboard-centric control and extensible functionality.

Gradio

New York, United States

Gradio provides open-source Python libraries and a platform for rapidly building and sharing web-based user interfaces for machine learning models. Its core technology centers on automatically generating interactive web components from Python functions, eliminating the need for traditional web development skills. Gradio targets machine learning practitioners and researchers seeking streamlined tools for model demonstration, testing, and deployment – particularly those prioritizing speed and ease of use over highly customized frontends.

Streamlit

San Francisco, United States

Streamlit provides an open-source Python library enabling data scientists and machine learning engineers to rapidly build and deploy interactive data applications. Its core technology centers on automatically handling UI updates and state management based on Python code, minimizing front-end development requirements. Streamlit uniquely targets the gap between data science experimentation and production deployment, facilitating easy sharing and collaboration on ML models and analyses.

Kapa.ai

San Francisco, United States

Kapa.ai develops AI agents specifically for customer self-service, focused on providing accurate answers to technical questions. Their core technology centers on retrieval-augmented generation (RAG) applied to proprietary technical documentation, enabling AI assistants trained on a company’s specific knowledge base. They target software companies and technical product teams seeking to improve support efficiency and reduce reliance on human agents, demonstrated by a client base including OpenAI, Docker, and Mapbox.

Mendable

San Francisco, United States

Mendable provides a platform for developers to build and deploy custom AI chat applications focused on knowledge retrieval. Their core technology centers on enabling businesses to train secure AI agents on proprietary technical documentation and data sources. They target sales and support teams seeking to automate responses to customer and employee inquiries, thereby reducing support ticket volume and improving response times.

Meilisearch

Paris, France

Meilisearch develops an open-source, lightning-fast search engine designed for developers. Its core technology centers on a customizable ranking algorithm and optimized indexing for sub-50ms response times, enabling relevant “search-as-you-type” experiences. Meilisearch targets developers seeking to integrate powerful, easily deployable search and AI retrieval capabilities into web applications and platforms without complex configuration.

LMNT

San Francisco, United States

LMNT develops real-time text-to-speech (TTS) technology focused on low-latency and high fidelity voice generation. Their core product is a voice cloning and streaming API enabling developers to create custom AI voices for applications requiring conversational interfaces. Targeting game developers, virtual assistant creators, and interactive application builders, LMNT was founded by a team with prior experience at Google and emphasizes scalability for production deployments.

Neets.ai develops real-time, low-latency text-to-speech (TTS) APIs for developers. Their core technology focuses on highly customizable and expressive neural voice cloning and generation, enabling creation of unique synthetic voices from limited audio data. Targeting game developers, metaverse platforms, and interactive voice response (IVR) systems, Neets.ai recently launched a public beta program for their voice API following seed funding in late 2023.

Skyvern

San Francisco, United States

Skyvern develops AI-powered agents for automating complex browser-based tasks. Their core technology utilizes large language models to interpret and interact with web pages without relying on traditional, fragile UI element selectors. Targeting developers and businesses needing reliable web automation, Skyvern launched in 2023 and aims to simplify data extraction, form completion, and other repetitive online processes.

E2B

San Francisco, United States

E2B provides a cloud-based platform enabling enterprises to deploy and manage AI agents within secure, isolated computing environments. Their core technology centers on AI sandboxing, allowing agents access to real-world tools and APIs without compromising core systems. Notably, E2B reports adoption by 88% of Fortune 100 companies, indicating a focus on large-scale enterprise deployments for advanced, agentic workflows.

Giskard AI

Paris, France

Giskard AI develops an automated red teaming platform focused on identifying security and quality vulnerabilities in AI systems, particularly Large Language Models. Their core technology utilizes continuous, domain-specific attack scenario generation to proactively test and improve AI agent robustness before deployment. Targeting organizations building and deploying AI applications, Giskard emphasizes data privacy and compliance with regulations like GDPR, SOC 2, and HIPAA, offering both EU and US data residency options.

Apify

Prague, Czech Republic

Apify provides a cloud-based platform specializing in web scraping, automation, and data delivery for AI applications. Their core offering is “Apify Actors”—pre-built and customizable tools enabling automated data extraction from websites, including complex platforms like TikTok, delivered via API. Targeting developers and data scientists, Apify supports use cases such as AI training data acquisition, market research, and competitive intelligence, and boasts a library of over 25,000 tools.

Mastra

San Francisco, United States

Mastra develops an open-source TypeScript framework enabling developers to build, test, and deploy AI agents and applications. Its core technology focuses on context tuning, recall improvement, and robust evaluation methods for achieving high agent accuracy. Mastra targets AI developers seeking a streamlined infrastructure for production-ready agent deployment, with a strong emphasis on evaluation and refinement.

FlowiseAI

Singapore, Singapore

FlowiseAI develops a visual, open-source platform enabling developers to build and deploy AI agents and LLM-based applications. Their core technology centers on a no-code, modular interface for orchestrating large language models and creating complex, multi-agent workflows. Targeting AI developers and researchers, FlowiseAI has rapidly gained traction within the open-source community as a leading tool for rapid prototyping and agent development.

Rime

San Francisco, United States

Rime develops customizable text-to-speech (TTS) models for enterprise applications, focusing on accurate pronunciation and multi-lingual support. Their core technology centers on AI voice models designed to improve customer experience in conversational AI systems. Targeting businesses requiring high-quality voice interactions, Rime launched in 2023 with a focus on reducing call abandonment rates through natural-sounding TTS.

Gladia

Paris, France

Gladia provides a unified API for audio transcription and enrichment, enabling developers to convert spoken language into structured data. Their core technology focuses on a single, multilingual speech-to-text (STT) endpoint capable of processing over 100 languages – including mid-sentence language switching – without requiring separate models. Gladia targets developers building voice products, global support systems, and multilingual voice agents, and aims to simplify audio data processing across diverse linguistic environments.

Zencoder

Palo Alto, United States

Zencoder develops an AI-powered platform enabling developers to orchestrate and deploy various large language models (LLMs) for code generation and execution. Their core offering is an “AI Coding Agent Platform” that facilitates task assignment to the optimal LLM – including models like Gemini, Codex, and Opus – based on quality and cost. Founded in 2023, Zencoder targets developer teams seeking to improve code productivity and avoid vendor lock-in with a multi-model approach.

Cline

San Francisco, United States

Cline develops an open-source AI coding agent focused on terminal-first workflows and utilizing “Plan/Act” modes for task execution. Their core technology centers around autonomous AI agents capable of writing and executing code, demonstrated through competitive “Thunderdome” environments pitting agents against each other. With reported adoption by over 8 million developers, Cline targets software engineers seeking locally-run, customizable AI coding assistance.

Qodo

Tel Aviv, Israel

Qodo develops an AI-powered platform for code review, testing, and generation, integrating directly into developer workflows via IDEs and pull requests. Their core technology utilizes agentic AI workflows to provide context-aware code suggestions, enforce coding standards, and automatically resolve issues with a reported F1 score of 64.3% on a standard code review benchmark. Targeting software development teams, Qodo aims to improve code quality and accelerate development cycles, particularly for complex codebases.

CodeRabbit

San Francisco, United States

CodeRabbit develops an AI-powered code review tool designed to automate and accelerate the software development process. Their core product utilizes large language models to provide context-aware feedback, line-by-line suggestions, and conversational support directly within pull requests. Targeting software development teams, CodeRabbit aims to reduce code review times and improve code quality, launching in 2023 with a focus on immediate integration into existing developer workflows.

Daytona

San Francisco, United States

Daytona provides a cloud infrastructure platform specifically designed for deploying and running AI-generated code. Their core offering centers on rapidly provisioned, stateful environments – boasting 90ms creation times – coupled with robust security features. Targeting developers and enterprises focused on MLOps, Daytona aims to streamline AI code deployment and execution with a focus on speed and reliability.

Cosine

London, United Kingdom

Cosine develops AI coding models focused on production-level software engineering. Their core product, the Lumen family of models, utilizes a proprietary 8-step data pipeline and reinforcement learning to generate maintainable, low-complexity code across a range of languages – including commonly used enterprise and niche languages like Rust and Fortran. Cosine targets professional software development teams seeking to improve code quality and velocity beyond typical “copilot” solutions.

Freeplay

Boulder, United States

Freeplay provides a developer-first platform for building, deploying, and scaling AI applications. Their core offering is an open-source, Kubernetes-native framework simplifying MLOps workflows through automated infrastructure provisioning and streamlined model management. Targeting machine learning engineers and data science teams, Freeplay recently secured $12 million in seed funding led by Madrona, indicating early market validation and investor confidence.

PromptLayer

New York, United States

PromptLayer provides an MLOps platform specifically for prompt engineering and LLM-powered agents. Their core product is a version control, evaluation, and monitoring system designed to improve the reliability and performance of AI prompts and agents through tracing, regression testing, and collaborative tooling. Targeting AI engineering teams and enabling domain expert input, PromptLayer aims to streamline the development lifecycle for generative AI applications.

Inkeep

New York, United States

Inkeep provides a platform for building and deploying custom AI Agents focused on customer and operational workflows. Their core offering is a unified platform featuring both a no-code visual builder and a developer SDK, enabling collaborative agent development between technical and non-technical teams. Targeting businesses seeking to automate customer experience and internal operations, Inkeep emphasizes agents grounded in proprietary data and knowledge base understanding.

BlinqIO

Wilmington, United States

BlinqIO develops an AI-powered platform for software test automation. Their core product, the “AI Test Engineer,” utilizes generative AI to autonomously create and maintain test code based on user requirements, reducing the need for manual scripting. Targeting software development teams, BlinqIO launched in 2023 with a focus on scaling automated testing capabilities and is positioned as a first-to-market solution in autonomous testing.

Limrun

San Francisco, United States

Limrun is a cloud platform that gives coding agents native mobile-development infrastructure: on-demand remote Xcode and macOS for iOS, accelerated Android emulators, and physical-device hardware as cloud services, so an agent on a Linux VM can build, run, and share iOS/Android apps with live preview URLs. Accessed via the lim CLI, SDKs, and a REST API.

OpenProse

San Francisco, United States

OpenProse is a natural-language agent framework that structures Markdown with contracts (requires/ensures blocks) so workflows are declared in structured English and run inside the agent session itself. Agents and *.prose.md contracts are portable across model providers and harnesses such as Claude Code, OpenCode, and Amp. Y Combinator-backed.

Deep Interactions

San Francisco, United States

Deep Interactions is a collaborative, human-in-the-loop AI builder for teams that turns business intent into shipped AI products (launch demos, internal copilots, or production features) by gathering shared context across founders, designers, engineers, and domain experts. Founded by Sruthi Viswanathan; Y Combinator-backed.

Superlog

San Francisco, United States

Superlog is AI-native observability that installs itself and fixes the bugs it finds: a wizard auto-instruments a codebase with OpenTelemetry, and when something breaks it groups errors into a single incident, investigates with full context, and posts one mergeable PR to Slack. Telemetry is vendor-neutral. Y Combinator-backed (P26).

Runtime

San Francisco, United States

Runtime provides sandboxed environments for teams to deploy coding agents safely, with built-in company context and integrations, configurable guardrails (allowlists, encrypted secrets, role-based access, approval gates), and full observability down to the tool call. Works with Claude Code, Codex, Copilot, and others. Y Combinator-backed (P26).

TesterArmy

San Francisco, United States

TesterArmy is an AI agent that tests websites and mobile apps from natural-language descriptions, running automatically on every GitHub pull request and on a schedule for production monitoring. It handles login flows, OAuth, and OTPs and returns screenshots, recordings, and actionable bug reports. Y Combinator-backed (P26).

Manicule is an AI-native technical-documentation agency that owns documentation end-to-end for developer-tool companies, covering information architecture, writing, design, and QA. AI agents handle code verification and auditing while human writers refine the result. Founded in San Francisco by Naman Bansal and Shreyans Jain; Y Combinator-backed (P26).