{"slug":"zitadel","name":"ZITADEL","domain":"zitadel.com","verdict":"As of 2026-07-16, ChatGPT, Claude, Gemini, Grok collectively rank ZITADEL #2 of 8 for self-hosted auth platform (one of 5 leaderboards it appears on). Source: https://modelsagree.com/product/zitadel (modelsagree.com, CC BY 4.0).","best_rank":2,"categories":5,"brief":{"category":"best-self-hosted-auth-platform","title":"Best self-hosted auth platform","rank":2,"of":8,"top":"Keycloak","day":"2026-07-17","why":[{"t":"First-class multi-tenant organizations","m":["Gemini","ChatGPT","Claude","Grok"],"q":"first-class multi-tenant organization isolation"},{"t":"Modern Go codebase","m":["Gemini","Claude","Grok"],"q":"modern Go codebase"},{"t":"Event-sourced audit logging","m":["Gemini","Claude","Grok"],"q":"event-sourced audit logging"},{"t":"API-first B2B SaaS design","m":["ChatGPT","Claude","Grok"],"q":"clean API-first design"}],"gap":[{"t":"LDAP and Active Directory federation","m":["ChatGPT","Claude","Gemini","Grok"],"q":"user federation (LDAP/AD)"},{"t":"Broad enterprise protocol support","m":["ChatGPT","Claude","Gemini","Grok"],"q":"broadest enterprise protocol/federation support"},{"t":"Massive ecosystem of extensions","m":["Gemini"],"q":"a massive ecosystem of extensions"}],"fix":[{"t":"Simpler self-hosted operations","m":["ChatGPT","Claude"],"q":"self-hosted operations are more complex"},{"t":"Larger ecosystem and community","m":["Claude"],"q":"Smaller ecosystem and community than Keycloak"},{"t":"Deeper legacy enterprise support","m":["Gemini"],"q":"deep Active Directory forest synchronization"}]},"entries":[{"slug":"best-self-hosted-auth-platform","title":"Best self-hosted auth platform","rank":2,"of":8,"score":17,"appearances":4,"modelRanks":{"ChatGPT":2,"Claude":2,"Gemini":1,"Grok":2},"reason":"Narrowly beats Keycloak for SaaS apps due to its first-class multi-tenant organization isolation, modern Go codebase, and event-sourced audit logging, making it much easier to deploy and scale for client-facing applications.","reasons":[{"model":"Gemini","reason":"Narrowly beats Keycloak for SaaS apps due to its first-class multi-tenant organization isolation, modern Go codebase, and event-sourced audit logging, making it much easier to deploy and scale for client-facing applications."},{"model":"ChatGPT","reason":"Near-tie with Keycloak for SaaS; excellent organization-native multitenancy, delegated administration, passkeys, service accounts, strong APIs, and modern self-service flows make it the cleaner default for greenfield B2B products"},{"model":"Claude","reason":"The strongest modern challenger — Go-based single binary, first-class multi-tenancy (organizations/projects) that SaaS builders actually need, event-sourced audit trail, good passkey and OIDC/SAML support, and a clean API-first design with a permissive-enough license and managed-cloud escape hatch. Near-tie with Authentik; Zitadel wins for SaaS/B2B multi-tenant use cases specifically."},{"model":"Grok","reason":"Cloud-native Go-based, excellent multi-tenancy/organizations for B2B SaaS, API-first/developer-friendly, strong audit/event sourcing, passkeys/MFA, efficient self-hosting (low overhead, K8s-friendly), modern alternative to legacy systems."}],"fixes":[{"model":"ChatGPT","fix":"Its event-driven architecture and self-hosted operations are more complex than simpler PostgreSQL-backed alternatives"},{"model":"Claude","fix":"Smaller ecosystem and community than Keycloak, and its opinionated event-sourced architecture plus login-UI customization model can fight you when you need deep bespoke flows."},{"model":"Gemini","fix":"Not built for legacy enterprise setups needing deep Active Directory forest synchronization or complex visual policy flow editors."}],"updated":"2026-07-16","api":"https://modelsagree.com/api/v1/best/best-self-hosted-auth-platform.json"},{"slug":"best-self-hosted-oauth-and-openid-connect-server","title":"Best self-hosted OAuth and OpenID Connect server","rank":2,"of":7,"score":14,"appearances":4,"modelRanks":{"ChatGPT":2,"Claude":2,"Gemini":3,"Grok":3},"reason":"A near-tie with Keycloak for cloud-native teams, combining polished OIDC/OAuth support, first-class organizations and multi-tenancy, passwordless authentication, strong APIs, auditability, and credible self-hosting; especially strong for B2B SaaS","reasons":[{"model":"ChatGPT","reason":"A near-tie with Keycloak for cloud-native teams, combining polished OIDC/OAuth support, first-class organizations and multi-tenancy, passwordless authentication, strong APIs, auditability, and credible self-hosting; especially strong for B2B SaaS"},{"model":"Claude","reason":"The strongest modern challenger — Go-based single binary, multi-tenancy as a first-class concept, event-sourced audit trail, passkeys/WebAuthn done well, solid APIs/Terraform support, and Apache-2.0 licensed with an optional commercial cloud; it delivers most of Keycloak's IdP surface with far less operational drag. Near-tie with Keycloak for greenfield SaaS builders; Keycloak wins on ecosystem maturity and enterprise federation depth."},{"model":"Gemini","reason":"Built specifically for SaaS with first-class multi-tenancy (near-tie with Authentik, chosen over it if B2B multi-tenancy is the priority), event-sourced audit logs, and a modern Go-based API-first design."},{"model":"Grok","reason":"Modern Go-based, lightweight, API-first (gRPC/REST), native multi-tenancy/organizations, event-sourced auditing, strong passkeys/MFA, excellent for cloud-native/K8s and B2B SaaS practitioners needing scalable, developer-friendly self-hosted OIDC."}],"fixes":[{"model":"ChatGPT","fix":"Event-sourced architecture and comparatively opinionated deployment make operating and troubleshooting it less familiar than conventional database-backed IAM"},{"model":"Claude","fix":"Requires CockroachDB/Postgres and its event-sourcing model makes some customizations and data migrations less straightforward; the extension/community ecosystem is much smaller than Keycloak's."},{"model":"Gemini","fix":"Its rigid tenant-organization hierarchy adds unnecessary overhead and complexity for single-tenant or home lab deployments."}],"updated":"2026-07-16","api":"https://modelsagree.com/api/v1/best/best-self-hosted-oauth-and-openid-connect-server.json"},{"slug":"best-self-hosted-customer-identity-platforms","title":"Best self-hosted customer identity platforms","rank":2,"of":7,"score":11,"appearances":3,"modelRanks":{"ChatGPT":2,"Claude":2,"Gemini":3},"reason":"Near-tied with Keycloak and arguably better for greenfield B2B SaaS: first-class organizations and projects, strong delegated administration, API-first automation, passkeys, SAML/OIDC, SCIM, and comprehensive audit events in a comparatively efficient package.","reasons":[{"model":"ChatGPT","reason":"Near-tied with Keycloak and arguably better for greenfield B2B SaaS: first-class organizations and projects, strong delegated administration, API-first automation, passkeys, SAML/OIDC, SCIM, and comprehensive audit events in a comparatively efficient package."},{"model":"Claude","reason":"Purpose-built modern CIAM — multi-tenancy, event-sourced audit trail by design, strong B2B/organization modeling, passkeys/FIDO2 first-class, clean APIs and good DX; a genuinely current architecture rather than a retrofitted legacy one."},{"model":"Gemini","reason":"Modern Go-based, cloud-native identity platform offering first-class multi-tenancy, native Passkeys/WebAuthn support, built-in immutable audit logs, and lightweight resource usage out of the box."}],"fixes":[{"model":"ChatGPT","fix":"Its smaller ecosystem and more opinionated architecture make unusual integrations, troubleshooting, and migrations riskier than with Keycloak."},{"model":"Claude","fix":"Younger ecosystem and smaller community than Keycloak; the event-sourcing + Postgres/CockroachDB storage model adds operational learning curve, and you'll hit fewer prewritten answers when troubleshooting."},{"model":"Gemini","fix":"Younger project ecosystem with significantly fewer third-party integrations and smaller community documentation compared to established industry giants."}],"updated":"2026-08-04","api":"https://modelsagree.com/api/v1/best/best-self-hosted-customer-identity-platforms.json"},{"slug":"best-customer-identity-platforms-for-multi-tenant-b2b-saas","title":"Best customer identity platforms for multi-tenant B2B SaaS","rank":9,"of":9,"score":1,"appearances":1,"modelRanks":{"ChatGPT":5},"reason":"Best open-source choice: multi-tenancy is foundational rather than retrofitted, with isolated organizations, delegated customer administration, per-organization identity providers and policies, SAML/OIDC, RBAC, exhaustive audit history, hosted or self-hosted deployment, and no MAU-driven architecture requirement.","reasons":[{"model":"ChatGPT","reason":"Best open-source choice: multi-tenancy is foundational rather than retrofitted, with isolated organizations, delegated customer administration, per-organization identity providers and policies, SAML/OIDC, RBAC, exhaustive audit history, hosted or self-hosted deployment, and no MAU-driven architecture requirement."}],"fixes":[{"model":"ChatGPT","fix":"SCIM remains comparatively immature and its lower-level model demands more identity expertise and implementation work than the hosted B2B-first leaders."}],"updated":"2026-08-03","api":"https://modelsagree.com/api/v1/best/best-customer-identity-platforms-for-multi-tenant-b2b-saas.json"},{"slug":"best-auth-provider","title":"Best authentication provider for web apps","rank":10,"of":10,"score":1,"appearances":1,"modelRanks":{"Grok":5},"reason":"Modern open-source (with cloud option) focused on multi-tenant SaaS with strong APIs, organizations, OIDC/SAML, audit/compliance features, and cloud-native ease; high merit for teams seeking self-hostable enterprise-grade without legacy bloat.","reasons":[{"model":"Grok","reason":"Modern open-source (with cloud option) focused on multi-tenant SaaS with strong APIs, organizations, OIDC/SAML, audit/compliance features, and cloud-native ease; high merit for teams seeking self-hostable enterprise-grade without legacy bloat."}],"fixes":[{"model":"Grok","fix":"Less mainstream adoption/DX polish than commercial leaders; requires more setup for simple consumer apps."}],"updated":"2026-07-15","api":"https://modelsagree.com/api/v1/best/best-auth-provider.json"}],"page":"https://modelsagree.com/product/zitadel","check":"https://modelsagree.com/check?q=ZITADEL","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}