Top Open Source Identity & Access Management (IAM) Tools in 2026
A curated collection of the 12 best free and open-source Identity & Access Management (IAM) 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-2.0
Cerbos
Fine-grained authorization for apps and AI agents
Stars4,558Last commit10d agoLicenseApache-2.0
Authgear
Secure identity & authentication platform for developers
Stars2,011Last commit11d agoLicenseApache-2.0Werbot
Secure server access sharing with audit trails
Stars169Last commit1mo agoLicenseOpen SourcePermify
Open-source fine-grained authorization service
Stars5,940Last commit24d agoLicenseAGPL-3.0Ory
Open-source identity and access management platform
Stars13,849Last commit1mo agoLicenseApache-2.0
Defguard
Zero-trust access management with WireGuard 2FA
Stars2,809Last commit27d agoLicenseOpen SourceHashiCorp Vault
Manages tokens, passwords, certificates, and encryption keys through a UI, CLI, or HTTP API, with dynamic credentials and encryption-as-a-service built in.
Stars36,178Last commit11d agoLicenseOpen SourceBetter Auth
Comprehensive authentication framework for TypeScript apps
Stars29,713Last commit11d agoLicenseMIT
Teleport
Unified identity platform for humans, machines, and AI
Stars—Last commitRecentlyLicenseOpen SourceStytch
Authentication and security APIs for apps
Stars—Last commitRecentlyLicenseOpen Source
