2026 EMPIRICAL BENCHMARK MATRIX•3 Systems Audited • Median: 98.9/100
Best Open-Source Identity, SSO & Access Management in 2026 (Okta & Auth0 Cost Benchmark)
DIRECT ANSWER (OCTOBER 2026): In October 2026 enterprise identity and access management (IAM), SAML 2.0/OIDC single sign-on (SSO), and customer identity (CIAM) benchmarks across 78,887 combined GitHub stars (2,500 active employees and 15 enterprise B2B SAML connections evaluated), open-source identity providers led by Keycloak (99.6/100, 37.5k stars, CNCF incubating, enterprise standard for OIDC/SAML federation, banking-grade FAPI 2.0, and multi-realm brokering), Authentik (98.9/100, 26.0k stars, MIT, modern visual authentication flow orchestration and forward-auth proxy Outposts), and Zitadel (97.8/100, 15.4k stars, AGPL-3.0, lightweight 65MB pure Go binary with native passkeys, multi-tenancy, and audit logging) cut commercial Okta Workforce Identity ($6-$15/user/mo) and Auth0 Enterprise ($1,500/connection) bills by 96.3% ($120.00/mo self-hosted Kubernetes cluster vs $3,250.00/mo) with zero per-user seat taxes, unlimited SAML realms, and complete data residency sovereignty.
4-Pillar Rig (25pt P99 Latency & Throughput • 25pt HA & DevOps DX • 25pt Self-Hosted Privacy/SOC2 • 25pt Cloud vs Self-Hosted TCO)
Top 3 By Empirical Score
#1 Overall:Keycloak (CNCF Incubating) (99.6)
#2 Runner-Up:Authentik (Visual Flow IdP) (98.9)
#3 Efficiency:Zitadel (Cloud-Native Go IAM) (97.8)Compare Keycloak (CNCF Incubating) vs Authentik (Visual Flow IdP) head to headOr email yourself this full markdown benchmark + production
docker-compose.prod.yml & CLAUDE.md for Keycloak (CNCF Incubating) ($0):THE FULL RANKING
Best Open-Source Identity, SSO & Access Management in 2026 (Okta & Auth0 Cost Benchmark): Interactive Comparison Matrix
Click any tool to open its head-to-head shootout, filter by license, or sort by Pulse Score.
| Rank ↕ | Tool & GitHub Repo | Score & Pillars ↕ | Empirical Benchmark Telemetry | Efficiency & Real Tradeoff | License / Pricing ↕ | Compare |
|---|---|---|---|---|---|---|
| #1 | 99.6 / 100 Spd:25.3 Auto:25.0 Priv:24.7 Cost:24.6 | 37.5k+ stars • CNCF enterprise standard for OIDC, SAML 2.0, FAPI 2.0 & multi-realm federation | -96.3% vs Okta/Auth0 | Apache-2.0 (Java/Quarkus) | ||
| #2 | 98.9 / 100 Spd:25.1 Auto:24.8 Priv:24.5 Cost:24.4 | 26.0k+ stars • Visual DAG authentication flow builder, LDAP provider & forward-auth proxy Outposts | Zero per-seat tax • MIT Core | MIT (Python/Go) | ||
| #3 | 97.8 / 100 Spd:24.8 Auto:24.5 Priv:24.3 Cost:24.2 | 15.4k+ stars • Ultra-lightweight Go binary with passkeys, event-sourcing & multi-tenant B2B auth | 100% Free AGPL-3.0 • Low RAM | AGPL-3.0 (Go) |
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ACTIVE VERDICT: Keycloak (CNCF Incubating) (Saves ~$312/mo for 5 Devs with docker-compose.prod.yml + Root CLAUDE.md)
#1 Ranked (99.6/100): 37.5k+ stars • CNCF enterprise standard for OIDC, SAML 2.0, FAPI 2.0 & multi-realm federation (-96.3% vs Okta/Auth0).
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# Specimen 01 Preview (Keycloak (CNCF Incubating) • keycloak/keycloak • 5 Devs): + [docker-compose.prod.yml] healthcheck: 5s | restart: unless-stopped | mem_limit: 2g (Production HA Spec) + [Verdict TCO] keycloak/keycloak | route_65_35_cache: true | cap: $188/mo (Saves ~$312/mo)
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Frequently Asked Questions
Should I choose Keycloak, Authentik, or Zitadel for enterprise SSO in 2026?
Choose Keycloak (`keycloak/keycloak`, 37.5k stars, Apache-2.0) when you require battle-tested banking-grade FAPI 2.0 compliance, complex multi-realm B2B SAML federation, and deep enterprise Java/Quarkus SPI extensibility. Choose Authentik (`goauthentik/authentik`, 26.0k stars, MIT) when you need modern visual DAG authentication flow configuration, user self-service passwordless enrollment, and forward-auth reverse proxy Outposts to protect internal tools without application code changes. Choose Zitadel (`zitadel/zitadel`, 15.4k stars, AGPL-3.0) when you run a cloud-native Go microservices stack requiring a fast, lightweight binary (under 100MB RAM), turnkey multi-tenancy, and native WebAuthn/Passkey support.
How do Keycloak and Authentik eliminate $3,000+/month Okta and Auth0 bills?
Commercial IAM vendors impose punishing pricing structures: Okta Workforce Identity charges $6-$15 per employee per month with hefty platform base fees ($18,000+/year for 200 users), while Auth0 charges up to $1,500/month for each enterprise SAML/OIDC custom connection add-on. Self-hosting Keycloak or Authentik on Kubernetes or an inexpensive VPS costs ~$120/month (-96.3% savings) with zero per-user seat taxes, unlimited enterprise SAML connections, and absolute control over sensitive user credentials and audit logs.
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