Auth.js
authjs.dev
Open sourceNo card
Free open-source authentication library for JavaScript web frameworks
- Free tier
- Yes
- Per month
- Free
- MCP
- No
Why it's here
Free and widely adopted JavaScript auth; self-hosted setup means more work, with no built-in MCP.
Free tier
Open-source library; no hosted service, usage limits or vendor pricing
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Auth
#9 of 26Free and widely adopted JavaScript auth; self-hosted setup means more work, with no built-in MCP.
| per month | Open sourceFreeYou supply hosting, database and email |
|---|---|
| Custom domain | |
| MFA | |
| SAML SSO | |
| Passkeys | |
| No vendor brand | |
| Organizations | |
| Roles & RBAC | |
| SCIM sync | |
| Audit logs | |
| Free MAU | 1000000 users/mo |