All Open Source Apps

A reactive Python notebook that eliminates hidden state, runs reproducibly, and deploys as a web app or script — stored as pure Python, built for the AI era.

Lightning-fast hybrid search engine with AI-powered semantic and full-text retrieval for modern applications.

Open-source AI observability platform for tracing, evaluating, and debugging LLM applications with built-in intelligence and MCP support.

Open source payments infrastructure that turns software into a business — subscriptions, usage-based billing, digital products, and merchant-of-record compliance in one platform.

A fast, secure WebAssembly runtime that runs lightweight containers anywhere — from desktop and cloud to the edge and the browser.

Open-source no-code platform to build databases, apps, automations, and AI agents — self-hosted or cloud, with full data ownership.

Open source Loom alternative with GPU-accelerated recording, instant share links, AI summaries, and full self-hosting via Docker Compose.

The offline-first diagram editor that puts security above all else — no account, no data leaving your machine, no compromises.

Git, but better — a modern version control client with stacked branches, parallel workflows, unlimited undo, and first-class support for AI-powered development.

The pioneering open-source autonomous AI agent that conducts deep, multi-source research and produces citation-backed reports exceeding 2,000 words — faster and more reliably than any human researcher.

Open-source LMS with AI tutoring, real-time collaboration boards, live code execution, and built-in course monetization — self-hosted in minutes.

Federated, self-hosted Reddit alternative with full community ownership and no corporate control.

OpenAI's open-source CLI coding agent that reads, edits, and runs code in your terminal using natural language prompts.

Skyvern (YC S2023) automates browser-based workflows by pairing LLMs with computer vision, letting agents click, fill, and extract data on sites they've never seen, without brittle XPath selectors that break on every layout change.

All-in-one secure mail and collaboration server covering IMAP, JMAP, SMTP, CalDAV, CardDAV, and WebDAV in a single memory-safe Rust binary.

Open-source agentic security automation platform that runs AI agents and durable workflows at scale with sandboxed execution.

Run and fine-tune LLMs, diffusion, audio and embedding models on your own hardware, from a native desktop app, a browser UI, or a Python library.

An open source AI-native proxy that secures, observes, and governs agent-to-LLM, agent-to-tool, and agent-to-agent communication through MCP, A2A, and unified LLM routing.

Self-hosted web archiving that saves HTML, PDFs, screenshots, media, and code in open formats you own forever

The batteries-included Python agent harness — planning, sub-agents, filesystem, shell, memory, and skills bundled in, built on LangGraph.

Open-source collaborative knowledge platform with real-time editing, AI writing tools, and full self-hosting control — built by the French and German governments.

Open-source HRMS covering recruitment, attendance, payroll, and biometrics in one self-hosted Django application.

Self-hosted read-it-later platform with highlights, newsletters, PDFs, and seamless Obsidian and Logseq integration.

Born out of Y Combinator's S2023 batch, ParadeDB is a Postgres extension that delivers Elasticsearch-quality BM25 search and real-time analytics without a separate search cluster to manage.