Faable Auth vs Auth0, Clerk & Keycloak
Short answer: Faable Auth is a managed, multi-tenant identity server built on OAuth 2.0 and OpenID Connect — comparable to Auth0 or Clerk, but hosted 100% in Europe with full GDPR data sovereignty, with no infrastructure for you to run (unlike self-hosted Keycloak), and bundled in the same subscription as Faable Deploy with simple MAU-based pricing and support from the engineers who run it.
Each option below is a strong identity solution; this page helps you pick by priorities.
Quick comparison
| Capability | Faable Auth | Auth0 | Clerk | Keycloak |
|---|---|---|---|---|
| OAuth 2.0 / OIDC standards | ✅ | ✅ | ✅ | ✅ |
| Social login (Google, Apple, GitHub, Facebook) | ✅ | ✅ | ✅ | ✅ |
| Passwordless (magic link / OTP) | ✅ | ✅ | ✅ | Via extensions |
| Enterprise SSO / SAML | ✅ | ✅ | ✅ (higher tiers) | ✅ |
| MFA / 2FA | ✅ | ✅ | ✅ | ✅ |
| Machine-to-machine (M2M) tokens | ✅ | ✅ | Limited | ✅ |
| Multi-tenant by design | ✅ | Add-on / Organizations | Organizations | Realms (you model it) |
| Extensibility (custom code in the flow) | ✅ Actions + Webhooks | ✅ Actions | Webhooks | SPIs (Java) |
| Fully managed (no servers to run) | ✅ | ✅ | ✅ | ❌ self-hosted |
| 100% European hosting + GDPR sovereignty | ✅ | EU region available (US company) | US-based | Wherever you host it |
| Bundled with app hosting | ✅ Faable Deploy, same subscription | ❌ | ❌ | ❌ |
Competitor capabilities and tiers change frequently — confirm current details on each vendor’s own pricing and docs.
When Faable Auth is the better fit
- You need European data sovereignty. User identities stay in Europe under European law, with full GDPR compliance.
- You don’t want to operate auth infrastructure. Faable Auth is fully managed — no servers, upgrades, or database to run (the main cost of self-hosting Keycloak).
- You want auth and hosting together. Faable Deploy and Faable Auth share one subscription and one support relationship.
- You want predictable pricing based on monthly active users (MAU), not per-feature add-ons that escalate at scale.
- Multi-tenancy is first-class — isolate orgs, teams, and users by host without extra plumbing.
When another tool might fit better
- Auth0 has the deepest feature surface and ecosystem (now part of Okta); a fit for large enterprises already standardized on it, if EU sovereignty isn’t a hard requirement.
- Clerk offers excellent prebuilt React UI components and developer experience for B2C/B2B apps that are happy on US hosting.
- Keycloak is the go-to when you specifically want open-source, self-hosted identity and have the team to operate it.
How Faable Auth works
Four concepts model the whole product: Accounts (your tenant), Connections (sources of users), Clients (your apps), and Users & Teams. Add login with the @faable/auth-js SDK or a framework quickstart, and call the Management API from your backend with client credentials.
See Get Started with Faable Auth, or learn the concept first in What is a multi-tenant identity server?.