Ory
Open-source IAM/CIAM platform offering modular, API-first components: Ory Kratos for identity management, Ory Hydra for OAuth2/OIDC, Ory Keto for Zanzibar-inspired fine-grained authorization, and Ory Oathkeeper for API access control. Deployable self-hosted or as managed SaaS. Extends authentication, authorization, and audit controls to AI agents via MCP support.