ToolVitals

Identity & Access Management

Alternatives to Thunder

Compare healthier or more active tools in the same use case using ToolVitals public evidence.

View Thunder profile View Identity & Access Management leaderboard

Why compare

Signals behind this alternatives page

  • Maintenance and shipping signals are strong.
  • Health score: 95/100.
  • Shipping score: 100/100.

Switching guide

Best alternatives by need

Best overallAuthentik

Highest organic ToolVitals fit for this use case.

Healthier optionsAuthentik, Keycloak

Stronger current public-health signal than Thunder.

Verified open/source-visibleAuthentik, Keycloak, Better Auth, Zitadel

Useful when portability and inspectability matter.

License unknown, source-visible signalsStack Auth

Public source signals exist, but ToolVitals has not verified the license class.

Trust note: Sponsors and affiliate links are separate from rankings. ToolVitals does not let monetization change scores, risk labels, organic ordering, or evidence display.

Ranked alternatives

Best-fit identity & access management options

12 tools
02

Keycloak

Open Source Identity and Access Management For Modern Applications and Services

Active
Health95
Shipping100
Score98
Confidence100
Stars35.8k
ModeSource-visible project
View profile Compare with Thunder
06

Jans

Open source digital identity infrastructure with OAuth/OpenID and SSO components.

Active
Health91
Shipping100
Score95
Confidence92
Stars643
ModeSource-visible project
View profile Compare with Thunder
07

Logto

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Active
Health94
Shipping89
Score94
Confidence100
Stars14.2k
ModeSource-visible project
View profile Compare with Thunder
08

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

Active
Health93
Shipping89
Score94
Confidence100
Stars14.1k
ModeSource-visible project
View profile Compare with Thunder
12

Frontier

Frontier is an all-in-one user management platform that provides identity, access and billing management to help organizations secure their systems and data. (Open source alternative to Clerk, WorkOS)

Active
Health89
Shipping98
Score93
Confidence88
Stars342
ModeSource-visible project
View profile Compare with Thunder