authentik
Authentik Security Inc. · Identity & access
Self-hosted identity provider with OIDC, SAML, LDAP, RADIUS and SCIM support and a built-in application proxy, with an MIT core and an enterprise edition
MITOpen sourceFreeSelf-hostedNov 2, 2026
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Keycloak
Keycloak project (CNCF incubating, originated at Red Hat) · Identity & access
Open-source identity and access management server providing single sign-on with OpenID Connect, OAuth 2.0 and SAML, user federation and fine-grained authorization
Apache-2.0Open sourceFreeSelf-hostedNov 2, 2026
Web Authentication (WebAuthn)
W3C Web Authentication Working Group (with the FIDO Alliance) · Identity & access
W3C standard defining the browser API for creating and using public-key credentials, the basis of passkeys and FIDO2 hardware-key authentication
Open sourceFreeLocalBroken
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