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Open Source Authorization & Permissions Tools using CSS

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

Secure authentication and access control made simple
  • Stars

    37,441
  • Last commit

    7 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:

Take control of your identity with a secure, flexible solution
  • Stars

    26,017
  • Last commit

    7 hours ago
  • License

    MIT
authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.

Open Source Alternative to:

Secure, customizable identity infrastructure for developers
  • Stars

    15,353
  • Last commit

    1 day ago
  • License

    AGPL-3.0
ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.

Open Source Alternative to:

Modular auth, payments, emails, and analytics for your product
  • Stars

    6,875
  • Last commit

    15 hours ago
  • License

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

Open Source Alternative to:

Secure, policy-based access control for modern applications
  • Stars

    4,627
  • Last commit

    7 hours 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: