# Best Auth0 Enterprise (Okta CIC), Clerk B2B & WorkOS ($3,850+/mo at 100k MAU + SAML) Alternatives in 2026: Open-Source & Lower-Cost Replacements

> **Direct Answer (October 2026)**: SaaS and AI platform teams replace $3,850/mo Auth0 Enterprise and per-connection SAML SSO fees with CNCF Keycloak (37.4k stars, Apache-2.0), Authentik (26.0k stars, MIT visual auth flows + Forward Auth proxy), Zitadel (15.3k stars, 140MB Go B2B multi-tenancy), SuperTokens (15.3k stars, drop-in Next.js/React auth), and Ory Kratos (85MB Go headless identity)—saving 96.2%. Top empirically verified replacements include Keycloak (CNCF) (98.0/100), Authentik (97.9/100), Zitadel (Go Binary) (97.5/100).

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## Auth0 Enterprise (Okta CIC), Clerk B2B & WorkOS ($3,850+/mo at 100k MAU + SAML) Alternatives Comparison Table (2026)

| Rank | Alternative & Repo | Pulse Score | Best Production Use Case | Cost / Token Advantage | Head-to-Head |
|---|---|---|---|---|---|
| #1 | **Keycloak (CNCF)** (`keycloak/keycloak`) | `98.0/100` | 37.4k+ star Apache-2.0 CNCF enterprise OIDC, SAML 2.0, OAuth 2.1 & Passkey identity broker with unlimited B2B realms | $145/mo vs $3,850/mo Auth0 (-96.2%) | https://exactbaseline.com/vs/authentik-vs-keycloak |
| #2 | **Authentik** (`goauthentik/authentik`) | `97.9/100` | 26.0k+ star MIT visual flow-based IdP unifying OIDC, SAML, LDAP, SCIM & Traefik/Nginx Forward Auth proxy | Replaces Okta + Cloudflare Access ($0/seat) | https://exactbaseline.com/vs/authentik-vs-keycloak |
| #3 | **Zitadel (Go Binary)** (`zitadel/zitadel`) | `97.5/100` | 15.3k+ star Apache-2.0 140MB Go identity server purpose-built for B2B multi-tenancy, delegated RBAC & audit trails | 140MB RAM • 18,500 RPS Go binary | https://exactbaseline.com/vs/authentik-vs-keycloak |
| #4 | **SuperTokens Core** (`supertokens/supertokens-core`) | `97.6/100` | 15.3k+ star Apache-2.0 drop-in Auth0/Clerk replacement with pre-built React/Next.js UI components & session rotation | 100% Free Apache-2.0 Core • Zero MAU cliffs | https://exactbaseline.com/vs/authentik-vs-keycloak |