Best Open Source Alternatives to Auth0

2 open-source tools that can replace Auth0. Compare tech stacks, licenses and stars below.

MCPApache-2.0

Open-source, self-hosted IAM & SSO server with MCP gateway, supporting OAuth, OIDC, SAML, LDAP, and more.

14k·MCP Servers·Open source

Alternative to

AGPL-3.0

Self-hosted AI governance, RAG and document intelligence with citations, audit evidence and PII privacy controls.

15·Self-Hosted AI·Open source

Alternative to