zyphr — sessionhostapi.zyphr.devsession ~/alternatives/auth0/ready
dev@zyphr:~/zyphr$
Alternatives

Best Auth0 Alternatives in 2026

Seven options, including ours, with who each one is for and where each one falls short. If you need enterprise SAML today, the honest answer is near the bottom of this page.

dev@zyphr:~/zyphr$
// Why teams look for alternatives
  • Paid plans billed per monthly active user, with self-serve plans capped (enterprise sales above them) and B2B features and some attack protection on higher tiers.
  • Auth is only half the job: verification emails, password resets and security alerts still need a separate email or messaging vendor and glue code.
  • A large, enterprise-shaped product surface that is more than many startups and consumer apps need.
dev@zyphr:~/zyphr$
// Quick picks
#OptionBest for
1ZyphrApps that want auth and transactional messaging in one API
2ClerkReact and Next.js apps that want prebuilt sign-in UI
3WorkOSB2B SaaS selling to enterprises that require SSO and SCIM
4Firebase AuthenticationMobile and web apps already built on Firebase
5Supabase AuthTeams using Supabase Postgres and Row Level Security
6AWS CognitoAWS-heavy teams optimizing for cost at scale
7KeycloakTeams that must self-host identity

Last reviewed November 2026. Check each vendor's pricing page for current prices; they change often.

dev@zyphr:~/zyphr$
// Each option, honestly

1. Zyphr

A complete auth service (passkeys, social sign-in with Google, Apple, Facebook, GitHub and Microsoft, magic links, email and SMS codes, TOTP MFA, organizations (multiple per app from Pro), anonymous auth, RS256 JWTs with a public JWKS), plus the email, push, SMS, in-app and webhook delivery your auth flows need. Every sign-in and security feature is on every plan, 1,000 MAU and 1,000 emails a month free.

best for
Apps that want auth and transactional messaging in one API
watch out
No SAML, enterprise OIDC or SCIM yet, and MFA is TOTP with backup codes only. Password hashes cannot be imported yet, so password users set a new password once when you switch.

2. Clerk

Drop-in components for sign-in, sign-up and user profiles, with strong Next.js integration, organizations for B2B apps, and a hosted user dashboard.

best for
React and Next.js apps that want prebuilt sign-in UI
watch out
Strongest in React and Next.js, though native iOS and Android SDKs exist. Messaging beyond its own auth emails needs another vendor.

3. WorkOS

Enterprise SSO (SAML and OIDC), directory sync (SCIM), audit logs and an admin portal your customers' IT teams can use, plus AuthKit for general sign-in.

best for
B2B SaaS selling to enterprises that require SSO and SCIM
watch out
Built around enterprise SSO and SCIM, billed per connection; a consumer app will not use most of it.

4. Firebase Authentication

Google's auth service with client SDKs for web, iOS, Android, Flutter and Unity, a generous free tier, and an upgrade path to Identity Platform for SAML, OIDC and multi-tenancy.

best for
Mobile and web apps already built on Firebase
watch out
Ties you to Firebase and Google Cloud, and server-side customization is limited compared with a dedicated auth platform.

5. Supabase Auth

Open-source auth built into Supabase, so user identity flows straight into Postgres Row Level Security policies. Hosted or self-hosted.

best for
Teams using Supabase Postgres and Row Level Security
watch out
Best value when Supabase is also your database; as a standalone auth service it is a less natural fit.

6. AWS Cognito

AWS-native user pools with SAML and OIDC federation and tight integration with IAM, API Gateway and Lambda triggers.

best for
AWS-heavy teams optimizing for cost at scale
watch out
Developer experience is a common complaint, and password hashes cannot be exported if you ever leave.

7. Keycloak

Mature open-source identity server with SAML, OIDC, LDAP and Active Directory federation, fine-grained authorization and themable login pages.

best for
Teams that must self-host identity
watch out
You run, patch, scale and secure it yourself, which is a real operational commitment.
dev@zyphr:~/zyphr$
// Frequently asked questions
What is the best Auth0 alternative?

It depends on what you need beyond login. If your app also sends verification emails, password resets, push or webhooks, Zyphr replaces Auth0 and the messaging vendor with one API (1,000 MAU and 1,000 emails a month free). For prebuilt React UI, Clerk. For enterprise SAML and SCIM, WorkOS. To self-host, Keycloak.

Which Auth0 alternative supports SAML and enterprise SSO?

WorkOS, Keycloak, AWS Cognito, Firebase (through Identity Platform), Clerk (paid plans) and Supabase (paid plans) all support SAML. Zyphr does not support SAML, enterprise OIDC or SCIM yet, so if enterprise SSO is a requirement today, choose one of those.

Is there a free Auth0 alternative?

Yes. Zyphr includes 1,000 MAU and 1,000 emails a month free with every sign-in and security feature. Firebase Authentication, Supabase Auth and Clerk have free tiers, and Keycloak is free open-source software you host yourself.

Can I migrate from Auth0 without users resetting passwords?

With Zyphr, not yet: password hashes cannot be imported today, so password users set a new password once. Users who sign in with social providers or passwordless methods are unaffected. Check each alternative's import support before you move.

dev@zyphr:~/zyphr$
// Get started

Auth and messaging, one API

1,000 MAU and 1,000 emails a month free. No credit card.