Three auth platforms with three different shapes — a developer-first B2C/B2B suite, the enterprise identity incumbent, and an enterprise-readiness layer you bolt on later.
Pick Clerk when you want signup, sessions, and a polished user UI working in an afternoon — the fastest onramp for B2C and early B2B. Pick Auth0 when SSO, SAML, advanced compliance, and a complex multi-tenant identity model are non-negotiable from day one, usually because enterprise contracts are already on the table. Pick WorkOS when you've already built your own auth or use Clerk for the core flows and just need an enterprise-readiness layer — SAML, SCIM, audit logs — to close enterprise deals without rip-and-replace.
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| Attribute | Clerk | Auth0 | WorkOS |
|---|---|---|---|
| Category | Authentication | Authentication | Authentication |
| Pricing Model | freemium | freemium | freemium |
| Starting Price | Free / $25/mo | Free / $23/mo | Free |
| Free Tier | Yes | Yes | Yes |
| Open Source | No | No | No |
| Platforms | web, mobile, api | web, mobile, api | — |