Open Source Alternatives
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keycloak
31.4k
Apache License 2.0
Open Source Identity and Access Management For Modern Applications and Services
Updated: 2025-12-05
Privacy First
Exposed IP?
Self-hosting is great, but don't expose your home IP address.
Secure your connection with Surfshark VPN.
zitadel
12.3k
GNU Affero General Public License v3.0
ZITADEL - Identity infrastructure, simplified for you.
Updated: 2025-12-05
kratos
13.1k
Apache License 2.0
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.
Updated: 2025-12-04
authentik
19.1k
Other
The authentication glue you need.
Updated: 2025-12-05