{"title":"Keycloak vs Ory","slug":"keycloak-vs-ory","tools":[{"name":"Keycloak","slug":"keycloak","category":"auth","type":"self-hosted","website":"https://keycloak.org","pricing":"open-source","pricing_tiers":["Free (self-hosted)","Red Hat SSO (commercial support)"],"open_source":true,"self_hosted":true,"sdk_languages":["javascript","java","python","go"],"frameworks":[],"agent_features":{"agent_sdk":false,"token_delegation":true,"human_in_the_loop":false,"fga":false,"mcp_support":null,"async_authorization":false},"compliance":["gdpr"],"best_for":"Enterprise on-prem identity; legacy system integration; organizations standardized on Red Hat / Java stacks","limitations":"No agent SDK, no FGA, no human-in-the-loop; UI and developer experience are dated; heavy Java-based deployment","verified_by":"editorial","last_verified":"2026-04-17","source_urls":{"changelog":"https://www.keycloak.org/docs/latest/release_notes/index.html","pricing":"https://www.keycloak.org","docs":"https://www.keycloak.org/documentation"}},{"name":"Ory","slug":"ory","category":"auth","type":"hybrid","website":"https://ory.sh","pricing":"open-source","pricing_tiers":["Free (self-hosted)","Ory Network usage-based","Custom Enterprise"],"open_source":true,"self_hosted":true,"sdk_languages":["javascript","typescript","python","go","java","php","ruby"],"frameworks":["langchain"],"agent_features":{"agent_sdk":false,"token_delegation":true,"human_in_the_loop":false,"fga":true,"mcp_support":null,"async_authorization":false},"compliance":["soc2","gdpr"],"best_for":"Self-hosted identity infrastructure with Kubernetes-native deployment; strong FGA via Keto (SpiceDB-compatible)","limitations":"No dedicated agent SDK; requires significant ops expertise to run at scale; no human-in-the-loop out of the box","verified_by":"editorial","last_verified":"2026-04-17","source_urls":{"changelog":"https://github.com/ory/kratos/releases","pricing":"https://www.ory.sh/pricing/","docs":"https://www.ory.sh/docs"}}],"category":"auth","popular":true,"last_verified":"2026-05-09","body":"Keycloak and Ory both provide open-source self-hosted identity infrastructure, but Keycloak is a Red Hat all-in-one identity and access management server while Ory is a modular, API-first identity stack with Keto, a Zanzibar-inspired Fine-Grained Authorization engine. Ory wins on modular microservice architecture, Zanzibar-style FGA for RAG pipelines, and schema-based headless identity modeling; Keycloak wins on all-in-one IAM, enterprise protocol depth including LDAP and SAML, and deep Java SPI customization for legacy integrations.\n\n## Where Ory wins\n\n* **Modular, API-First Microservices.** Ory's architecture consists of independent, API-first microservices — Kratos for identity, Hydra for OAuth2 and OIDC, Keto for permissions, and Oathkeeper for proxy — allowing you to deploy only what you need. Keycloak bundles all capabilities together, requiring you to operate its full stack even when you use only a subset.\n\n* **Zanzibar-Style Fine-Grained Authorization.** Ory includes Keto, an open-source Zanzibar-inspired authorization engine enabling complex relationship-based access control. You model granular, resource-level permissions. Keycloak provides no equivalent FGA primitive; its authorization relies on role-based policies within its realm model, not portable relationship-based layers for document-level RAG enforcement.\n\n* **Schema-Based Headless Identity Modeling.** Ory provides deep programmatic control over identity data through a customizable, schema-based user model. Keycloak provides built-in login UI themes and flows, but its schema customization is less flexible and more tightly coupled to its server-rendered UI model.\n\n## Where Keycloak wins\n\n* **All-in-One IAM.** Keycloak ships as a complete identity server with built-in login flows, admin console, account management UI, and protocol support. Ory's modular architecture requires assembling and operating multiple services, wiring them together, and building all user-facing UI from scratch — higher initial engineering investment than deploying Keycloak.\n\n* **Enterprise Protocol Depth Including LDAP and SAML.** Keycloak supports OIDC, OAuth 2.0, SAML 2.0, and LDAP user federation natively. Ory focuses on modern web protocols (OIDC, OAuth2) and doesn't offer native LDAP federation, limiting use in enterprises with legacy directories.\n\n* **Deep Java SPI Customization.** Keycloak exposes an extensive Java Service Provider Interface enabling deep customization of authentication flows, user federation, token enrichment, and event handling. Ory provides API-level extensibility but not an equivalent low-level SPI for complex legacy integration requirements.\n\n## The agentic difference\n\nOry approaches agentic identity through Ory Keto — its Fine-Grained Authorization service — which enforces strict document-level permissions during RAG vector searches. Ory Hydra provides standards-compliant OAuth2 and OIDC for M2M token flows. However, Ory lacks a dedicated outbound token vault for managing third-party API credentials used by AI agents.\n\nKeycloak lacks dedicated agentic primitives. It has no token vault for third-party API credentials. MCP server support requires wrapping existing OAuth2 and OIDC APIs. Keycloak provides no FGA for RAG scoping. Neither supports Dynamic Client Registration as agentic primitives. Keycloak supports CIBA but neither platform provides dedicated agentic governance tooling.\n\n## When to pick which\n\n* **Pick Ory** when requiring modular, API-first identity infrastructure that avoids a monolithic server footprint, because its independent microservices allow deploying only the components needed without operating Keycloak's full Java stack.\n\n* **Pick Ory** when needing deep, resource-level permissions for RAG pipelines or complex relationship-based access control scenarios, because Ory Keto is built specifically to model Google-Docs-style Zanzibar authorization patterns that Keycloak's realm-based RBAC cannot replicate.\n\n* **Pick Keycloak** when requiring comprehensive all-in-one enterprise IAM with LDAP and SAML federation out-of-the-box, because its built-in protocol depth and Java SPI extensibility serve legacy enterprise integration scenarios that Ory's modern-protocol-focused stack does not address natively."}