27.5k
Authelia
Authelia is a Single Sign-On Multi-Factor Authentication portal for web apps, providing secure and streamlined access management.
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Authentication🔒
Security⚙️
DevOps
3 Open Source Alternatives to Keycloak
Looking for an open-source alternative to Keycloak? Below are 3 community-built tools that offer similar functionality — all free, open source, and ready to use or self-host. Ranked by GitHub stars.
13.5k
Zitadel
ZITADEL is a modern identity infrastructure that simplifies authentication and authorization for developers, providing advanced features like multi-factor authentication and single sign-on.
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Authentication🔒
Security🔁
API🛠️
Tools
1.6k
Authgear-server
authgear-server is an open-source authentication server that serves as an alternative to Auth0 and Firebase Auth. It provides secure, flexible, and scalable user authentication and identity management for web and mobile applications.
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Authentication🔒
Security🔁
API
Frequently asked questions
What are the best open-source alternatives to Keycloak?
The top picks from this list are Authelia, Zitadel, Authgear-server — all maintained, free to use, and self-hostable.
Are these alternatives to Keycloak free?
Yes. Every tool listed here is open source and free to use. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Can I self-host an alternative to Keycloak?
Most of the alternatives listed are self-hostable. Check each tool's page for hosting details, system requirements, and licensing terms.
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