Top Open Source Authentication & SSO Tools in 2026
A curated collection of the 12 best free and open-source Authentication & SSO tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Zitadel
Open-source identity infrastructure for developers
Stars14,870Last commit10d agoLicenseAGPL-3.0Keycloak
Open source identity and access management
Stars36,444Last commit10d agoLicenseApache-2.0Hexclave
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.
Stars6,841Last commit11d agoLicenseOpen Source
Authgear
Secure identity & authentication platform for developers
Stars2,011Last commit11d agoLicenseApache-2.0SuperTokens
Open source user authentication for apps
Stars15,285Last commit16d agoLicenseOpen SourceOry
Open-source identity and access management platform
Stars13,849Last commit1mo agoLicenseApache-2.0Logto
Modern auth infrastructure for developers
Stars14,470Last commit10d agoLicenseMPL-2.0JumpServer
Open-source privileged access management solution offering secure, browser-based access to SSH, RDP, Kubernetes, databases and remote applications.
Stars31,459Last commit10d agoLicenseGPL-3.0Hanko
Open source authentication platform supporting passkeys, 2FA, SSO, and social login. Self-host or use Hanko Cloud, with full control over your data and no lock-in.
Stars9,015Last commit13d agoLicenseOpen Source
Authentik
Open-source identity provider for secure authentication
Stars25,186Last commit10d agoLicenseOpen Source
Defguard
Zero-trust access management with WireGuard 2FA
Stars2,809Last commit27d agoLicenseOpen SourceBetter Auth
Comprehensive authentication framework for TypeScript apps
Stars29,713Last commit11d agoLicenseMIT
