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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


    36,312
  • Last commit


    9 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


    25,019
  • Last commit


    10 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


    14,799
  • Last commit


    15 hours 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


    6,842
  • 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


    4,547
  • Last commit


    3 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:

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