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Top Open Source Authorization & Permissions Tools in 2026

A curated collection of the 7 best free and open-source Authorization & Permissions tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.

  • Zitadel

    Open-source identity infrastructure for developers

    Stars
    14,870
    Last commit
    10d ago
    License
    AGPL-3.0

  • Keycloak

    Open source identity and access management

    Stars
    36,444
    Last commit
    10d ago
    License
    Apache-2.0

  • Hexclave

    Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.

    Stars
    6,841
    Last commit
    11d ago
    License
    Open Source

  • Cerbos

    Fine-grained authorization for apps and AI agents

    Stars
    4,558
    Last commit
    10d ago
    License
    Apache-2.0

  • Permify

    Open-source fine-grained authorization service

    Stars
    5,940
    Last commit
    24d ago
    License
    AGPL-3.0

  • Ory

    Open-source identity and access management platform

    Stars
    13,849
    Last commit
    1mo ago
    License
    Apache-2.0

  • Authentik

    Open-source identity provider for secure authentication

    Stars
    25,186
    Last commit
    10d ago
    License
    Open Source
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Showing 7 of 7 open-source tools