Open source oauth2 projects
Every project in the registry tagged oauth2, ranked by real GitHub adoption.
Postgres-powered backend platform for production apps
Framework-agnostic authentication for TypeScript applications
The Single Sign-On Multi-Factor portal for web apps. OpenID Certified™ and Post-Quantum Cryptography Ready.
Take control of your identity with a secure, flexible solution
Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user ca
Secure, customizable identity infrastructure for developers
A reverse proxy that provides authentication with Google, Azure, OpenID Connect and many more identity providers.
Secure, seamless authentication for modern applications
The all-in-one, open-source backend platform for agentic coding. InsForge gives your coding agent database, auth, storage, compute, hosting, and AI gateway to s
Build product integrations with 500+ APIs in hours
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication. 🔁 Mirro
Build reliable AI agents with unified tool integration
Easy integration with OAuth 2.0 service providers.
Library for OpenAPI 3 with spring-boot
an SSO and OAuth / OIDC login solution for Nginx using the auth_request module
Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...
🔐 Authentication, Authorization, and Accounting (AAA) App and Plugin for Caddy v2. 💎 Implements Form-Based, Basic, Local, LDAP, OpenID Connect, OAuth 2.0 (Git
Managed identity and access management for any app
Bichon – A lightweight, high-performance Rust email archiver with WebUI
Self-hosted application server for schema-driven APIs, identity, files, automation, integrations, realtime, metering, and protocols.
Welcome to the WSO2 Identity Server source code! For info on working with the WSO2 Identity Server repository and contributing code, click the link below.
OpenID/Connect, OAuth2, WS-Federation and SAML 2.0 server based on Duende IdentityServer and ITFoxtec Identity SAML 2.0 with its admin UI
The Janssen Project is a home for open source IAM components, featuring Auth Server (OAuth/OpenID), Agama low-code identity orchestration, and the Cedarling pol
Java-based API Gateway bridging legacy and modern APIs with WSDL-to-OpenAPI, SOAP-to-REST, XML, OAuth2, and GraphQL.
A turnkey OAuth & authentication system, designed for both Cloudflare Workers and Node.js
openvpn-auth-oauth2 is a plugin/management interface client for OpenVPN server to handle an OIDC based single sign-on (SSO) auth flows
Related tags
Frequently asked questions
How many open source oauth2 projects are there?
This registry tracks 27 projects tagged oauth2, with 342,952 GitHub stars between them. The most-adopted is Supabase at 114,446 stars.
Are these oauth2 projects free to use?
Yes — 25 of the 27 carry an explicit open-source licence across 5 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which oauth2 project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these oauth2 projects still maintained?
26 of the 27 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.