01
Keycloak
Open Source Identity and Access Management For Modern Applications and Services
Health98
Shipping97
Score98
Confidence90
Stars36.7k
ModeSource-visible project
Identity & Access Management
Alternatives to Thunder
Compare healthier or more active tools in the same use case using ToolVitals public evidence.
Why compare
Signals behind this alternatives page
- Commit continuity, contributor activity, and delivery signals are strong.
- Health score: 98/100.
- Shipping score: 98/100.
Switching guide
Best alternatives by need
Verified open/source-visibleKeycloak, Better Auth, Authelia, Authentik
Useful when portability and inspectability matter.
Ranked alternatives
Best-fit identity & access management options
Active
02
Better Auth
The most comprehensive authentication framework
Health98
Shipping97
Score97
Confidence90
Stars29.9k
ModeSource-visible project
03
Authelia
The Single Sign-On Multi-Factor portal for web apps, now OpenID Certified™
Health95
Shipping94
Score95
Confidence90
Stars28.9k
ModeSource-visible project
04
Authentik
The authentication glue you need.
Health98
Shipping98
Score98
Confidence90
Stars25.4k
ModeSource-visible project
05
Zitadel
ZITADEL - Identity infrastructure, simplified for you.
Health96
Shipping95
Score96
Confidence90
Stars15k
ModeSource-visible project
06
Logto
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
Health97
Shipping96
Score96
Confidence90
Stars14.5k
ModeSource-visible project
07
Casdoor
An open-source Agent-first Identity and Access Management (IAM) /LLM MCP & agent gateway and auth server with web UI supporting OpenClaw, MCP, OAuth, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, Face ID, Google Workspace, Azure AD
Health97
Shipping96
Score96
Confidence90
Stars14.4k
ModeSource-visible project
08
Pocket ID
A simple and easy-to-use OIDC provider that allows users to authenticate with their passkeys to your services.
Health96
Shipping95
Score96
Confidence90
Stars9.2k
ModeSource-visible project
09
Pomerium
Pomerium is an identity and context-aware access proxy.
Health95
Shipping95
Score95
Confidence90
Stars5k
ModeSource-visible project
10
Cerbos
Granular access control and policy engine.
Health95
Shipping94
Score95
Confidence90
Stars4.6k
ModeSource-visible project
11
Authgear
Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps
Health95
Shipping96
Score95
Confidence90
Stars2k
ModeSource-visible project
12
AthenZ
Open source platform for service authentication and fine-grained access control.
Health95
Shipping94
Score95
Confidence90
Stars1k
ModeSource-visible project