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Open Source Authorization & Permissions Tools using Java

A curated collection of the best open source systems for defining and enforcing access control policies. using Java.

Keycloak

Secure authentication and access control made simple

  • Stars

    37,615

  • Last commit

    4 hours ago

  • License

    Apache-2.0
Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.

Open Source Alternative to:

Auth0

Permify

Build scalable authorization in minutes, not months

  • Stars

    5,968

  • Last commit

    8 days ago

  • License

    AGPL-3.0
Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.

Open Source Alternative to:

Auth0

Cerbos

Secure, policy-based access control for modern applications

  • Stars

    4,638

  • Last commit

    2 days ago

  • License

    Apache-2.0
A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions management.

Open Source Alternative to:

Auth0
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