All Open Source Apps

Run Llama, Gemma, DeepSeek, and other open LLMs on your own machine with one command and an OpenAI-compatible API.

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.

An open source, Google Zanzibar-inspired authorization database that models permissions as relationships and evaluates fine-grained access checks at massive scale with single-digit millisecond latency.

The open-source PDF platform you can run anywhere — edit, convert, sign, and automate PDFs without sending files to external servers.

Self-hosted WakaTime-compatible coding statistics backend that gives developers full control over their coding activity data.

Open-source, self-hostable authentication platform with passkeys, biometric login, SSO, MFA, and GraphQL admin API — a full Auth0/Clerk/Firebase alternative for SaaS and mobile apps.

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

eBPF-powered observability with AI root cause analysis — zero code changes required, full-stack visibility out of the box.

Open-source community platform with dynamic trust levels, real-time chat, and a powerful plugin architecture for self-hosted forums.

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

A fast, free, and focused Kanban tool from 37signals that strips away corporate bloat to help teams track bugs, issues, and ideas with clarity.

A lightweight, self-hosted push notification server that sends and receives messages in real time over WebSocket, with a sleek web UI and a native Go plugin system.

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, self-hostable authentication platform with passkeys, SAML SSO, and OAuth — the privacy-first alternative to Auth0 and Clerk.

A unified open source DevOps platform combining Git hosting, CI/CD pipelines, cloud development environments, and artifact registries in a single self-hosted system.

Self-hosted event ticketing platform that keeps your attendee data, brand, and revenue completely under your control.

Open-source metering, billing, and revenue infrastructure for product-led companies that need complete control over their pricing stack.

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

The programmable open source core ledger for fintech — build money-moving applications with atomic multi-posting transactions, account-based modeling, and Numscript, a built-in DSL for financial logic.

Send push notifications to your phone or desktop from any script or service using a single HTTP PUT or POST—no sign-up required.

Build unlimited, embeddable forms with no code — powered by AI, logic rules, and real-time analytics

Open Source realtime backend in 1 file — embedded SQLite, auth, file storage, and admin UI as a single Go binary.

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.