A set of beautifully-designed, accessible components and a code distribution platform. Works with your favorite frameworks. Open Source. Open Code.

The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

🔥 The Web Data API for AI - Turn entire websites into LLM-ready markdown or structured data

Next generation frontend tooling. It's fast!

Easy to maintain open source documentation websites.

Scheduling infrastructure for absolutely everyone.

A markdown parser and compiler. Built for speed.

React Flow | Svelte Flow - Powerful open source libraries for building node-based UIs with React (https://reactflow.dev) or Svelte (https://svelteflow.dev). Ready out-of-the-box and infinitely cust…

Backstage is an open framework for building developer portals

The world's most flexible commerce platform.

Make images smaller using best-in-class codecs, right in the browser.

🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

A full-featured, hackable Next.js AI chatbot built by Vercel

Notion-style WYSIWYG editor with AI-powered autocompletion.

Fast, unstyled command menu React component.

An opinionated toast component for React.

Kepler.gl is a powerful open source geospatial analysis tool for large-scale data sets.

Shopify's Polaris Design System - React implementation (Deprecated)

Input OpenAPI. Output SDKs and Docs.

Copy & Paste React components to build modern web applications.

Biomes is an open source sandbox MMORPG built for the web using web technologies such as Next.js, Typescript, React and WebAssembly.

open file format for localizing software (i18n)

Easily share permanent links to ChatGPT conversations with your friends

Emdash is the Open-Source Agentic Development Environment (🧡 YC W26). Run multiple coding agents in parallel. Use any provider.

📊 llm.report is an open-source logging and analytics platform for OpenAI: Log your ChatGPT API requests, analyze costs, and improve your prompts.

Fork, config, customize and ship your own candy machine mint app on your own domain, ultra fast.

A dead-simple API to build LLM-powered apps

Embeddable version control system

Production-ready MVP for securely chatting with your documents using pgvector

Send usage data from your web app or site to PostHog, with autocapture.