Y Combinator

Observability, testing, and compliance framework for autonomous AI agents

Infrastructure platform for automating hyper-realistic outbound and inbound enterprise AI phone calls

Open-source platform that generates SDKs and API docs from OpenAPI specs

Lightning-fast voice AI platform offering speech-to-text and text-to-speech APIs

API platform that turns any website into clean, LLM-ready Markdown data for AI agents and web scrapers

Deploy full-stack applications and databases directly on servers close to users worldwide

Autonomous AI agent platform for prevention-first endpoint cybersecurity

Open-source LLM observability, caching, and rate limiting infrastructure

Open-source secrets management platform for syncing environment variables and enterprise credentials securely

Open-source LLM engineering platform for tracing, analytics, and evaluations

Modern email platform engineered specifically for software companies and SaaS product growth teams

Open-source long-term memory layer for AI agents and LLM applications giving bots adaptive personal context

Automated developer documentation platform that converts code into beautiful docs

Unified integration platform for building, syncing, and maintaining product integrations with 250+ APIs

Open-source notification infrastructure for engineering teams

Get up and running with open-weight local LLMs like Llama 3, Mistral & Gemma

Open-source AI enterprise search platform connecting to Notion, Slack, GitHub, and Jira with strict access controls

Professional network for tech proof-of-work, projects, and hiring

AI-powered 15-30 minute medicine delivery platform stocking 40,000+ SKUs

Open-source product analytics, session replay, feature flags, and A/B testing suite

Extensible Mac productivity launcher that replaces Spotlight with AI extensions, window management, and developer tools

The zero-friction cloud platform for hosting web apps, static sites, databases, and cron jobs

Run open-source machine learning models with a single line of API code

Software creation platform & AI agent enabling anyone to build and deploy software instantly

Modern email infrastructure and API built for developers

Data infrastructure for AI, supplying training data for frontier models

The open source Firebase alternative with Postgres and instant APIs

Enterprise webhooks-as-a-service platform for developers

Generative AI video voice and avatar replica platform for personalizing customer conversations at scale

Open-source background jobs platform designed for Next.js and TypeScript

Voice AI developer platform for building low-latency, real-time conversational phone agents and voice apps

The enterprise platform for testing, evaluating, and monitoring LLM applications in production

The visual web development platform for building custom, production-ready websites

The global leader in no-code workflow automation connecting over 7,000 web apps

India's fastest-growing 10-minute quick commerce delivery unicorn