Auth0 alternatives
In short
- The monthly-active-user bill grew faster than the product did.
- A feature needed for the next stage sits two plan tiers up.
- Holding a user directory turned out to be more operational work than expected.
| SingleSign | Auth0 | |
|---|---|---|
| Cost at 50,000 monthly users | Free | Metered, plan-dependent |
| You hold user credentials | No | Yes |
| Your own branded sign-up | No | Yes |
| Enterprise SAML | No | Yes |
| Custom login-time code | No | Yes |
| OAuth 2.0 / OIDC, PKCE, MFA | Yes | Yes |
| Typical integration effort | Hours | Already done |
What moving off Auth0 actually involves
- 1
Your OAuth client code barely changes
Both are OAuth 2.0 and OpenID Connect. In most codebases the change is the issuer URL, the client ID and the endpoint paths — the Authorization Code with PKCE flow itself is identical.
- 2
Your users cannot be copied across
This is the real cost, and no amount of tooling removes it. SingleSign accounts belong to the people who hold them, so existing users sign in and connect their account rather than being imported. Plan a period where both providers are accepted.
- 3
Re-map your claims
Auth0 custom claims are namespaced to a URI. Map the ones you depend on to SingleSign scopes, and drop the ones you added but never read.
- 4
Anything Actions were doing needs a home
If Auth0 Actions enrich tokens or run checks during login, that logic moves into your own backend, after the token exchange.
- 5
Run both, then cut over
Accept both providers during the overlap, watch the share of sign-ins move, and retire the Auth0 tenant only once it has gone quiet.
When to stay on Auth0
- You sell to enterprises that require SAML or their own federated identity provider.
- Your sign-up experience is a differentiator you are not willing to hand over.
- You rely on Actions for risk scoring or provisioning during login.
Still deciding rather than migrating? The head-to-head comparison covers the same ground for someone who has not committed yet.
Try the integration before you plan the migration.
Read the quickstartAlso worth reading
- identity provider alternativesIdentity provider alternatives, by the provider you are leaving: what actually has to change in your code, and what does not.
- Auth0 comparisonSingleSign vs Auth0 compared on the difference that matters: who owns the account. A side-by-side table, then the three cases where each one is the right call.
- free identity providerSingleSign pricing in one line: sign-in is free, with no monthly-active-user meter. See exactly what is included, and what SingleSign Mail costs for businesses.