Clerk · infrastructure · founded 2019
Clerk for humans
Clerk sells beautiful auth components plus a user management backend, especially for Next.js and B2B organizations. Humans get a polished sign-in in an afternoon. Agents get Backend APIs and webhooks. Compared with Auth0 it is more frontend-opinionated and less identity-federation-ancient. Both belong in a worldwide auth shortlist. Twin Score on this directory is 88 for humans and 86 for agents, using the public rubric (interface, onboarding, human docs, collaboration, support, pricing fairness, accessibility, reliability versus API quality, MCP or tool surface, CLI, structured docs, machine auth, quotas, determinism, and skill packaging). Clerk is sold by Clerk, founded 2019, headquartered in United States / remote. Pricing in public materials: Free; Pro and Enterprise with MAU and feature gates. Machine capabilities we record: API excellent, MCP none, CLI none, docs excellent, auth Publishable/secret keys, OAuth, B2B orgs. This page is editorial, not a star rating scraped from users.
Updated 2026-08-01. Editorial, not a user-count rating.
Edited by Edu Tor. Twin Score updated 2026-08-01. Method: methodology and rubric.
Twin page for agents: Clerk on Build Something Agents Want.
Capability matrix
This matrix is the same data agents see. MCP is listed only when a real surface exists — we do not fake a manifest.
API, MCP, CLI, docs, auth
| Surface | Level |
|---|---|
| API | excellent |
| MCP | none |
| CLI | none |
| Docs | excellent |
| Auth | Publishable/secret keys, OAuth, B2B orgs |
| SDKs | js, http |
Pricing and facts
Free; Pro and Enterprise with MAU and feature gates. Headquarters: United States / remote. Official site: https://clerk.com.
Editorial reviews
- Clerk for humans: an editorial Twin Score review — editorial · staff
- Clerk for agents: capability notes — editorial · staff