Open Source Alternatives
Open Source Auth Alternatives to Stytch
API-first authentication platform for passwordless, B2B SaaS auth, and fraud prevention.
Stytch is a trademark of its respective owner.
Updated May 2026
What you gain
- ✓No per-active-user billing as your user base grows
- ✓User identities and sessions stay in your own database
- ✓Self-hosted deployment for regulated user data
- ✓No vendor lock-in on auth
What you give up
- △No built-in device fingerprinting and fraud detection
- △No managed passwordless infrastructure (magic links, passkeys) out of the box
- △Fewer prebuilt B2B SSO connectors for enterprise customers
- △No vendor support for auth incidents
Switching Cost
Stytch sells convenience around auth, not your data. Users and sessions export to SuperTokens, ZITADEL, or Ory Kratos, which cover passwordless and session management. What you give up is Stytch's device fingerprinting and fraud detection, which has no clean open source equal, so high-fraud-risk products feel this most. A small team migrates core auth in a few days. A B2B SaaS relying on Stytch's enterprise SSO connectors and fraud signals should plan two to three weeks. The real cost is rebuilding fraud defenses you were renting.
| SuperTokens | ZITADEL | |
|---|---|---|
| Overlap | 70% | 65% |
| Migration | moderate | moderate |
| License | Apache License 2.0 | GNU Affero General Public License v3.0 |
| Best for | Small teams | Small teams |
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Drop-in Replacements
Ranked by feature coverage
SuperTokens
8170% coverageOpen source alternative to Auth0/Firebase Auth/Cognito
SuperTokens is the open source authentication platform: signup, password reset, social login, multi-factor auth, without Auth0 prices or Firebase lock-in. It handles session management, email verification, passwordless login, and social OAuth out of the box.
ZITADEL
7365% coverageIdentity infrastructure, simplified
ZITADEL is a self-contained identity platform: login, signup, SSO, multi-factor auth, user roles, all in one. It's an alternative to Auth0 or Clerk that you can self-host for free.
SuperTokens, ZITADEL, and Ory Kratos replace Stytch's auth and session layer. They don't replace Stytch's fraud and device-fingerprinting signals, which is what fraud-sensitive products pay for.
OSS covers
- ✓authentication
- ✓passwordless
- ✓session management
OSS does not cover
- △device fingerprinting
- △managed fraud detection
- △vendor support SLA
Building Blocks
Stytch is a platform. It bundles multiple capabilities into one subscription. These tools each cover one piece. Teams often assemble 2–3 of them instead of paying for the full suite.
AWS Cognito