{"name":"Stytch","slug":"stytch","category":"auth","type":"cloud","website":"https://stytch.com","pricing":"freemium","pricing_tiers":["Free up to 25 orgs","Usage-based Pro","Custom Enterprise"],"open_source":false,"self_hosted":false,"sdk_languages":["javascript","typescript","python","ruby","go"],"frameworks":["langchain","vercel-ai"],"agent_features":{"agent_sdk":false,"token_delegation":true,"human_in_the_loop":null,"fga":false,"mcp_support":null,"async_authorization":null},"compliance":["soc2","gdpr"],"best_for":"API-first auth for AI startups; headless identity with flexible session management","limitations":"No FGA, no dedicated agent SDK, no human-in-the-loop; good primitives but requires more DIY for complex agent patterns","verified_by":"editorial","last_verified":"2026-04-17","source_urls":{"changelog":"https://stytch.com/blog","pricing":"https://stytch.com/pricing","docs":"https://stytch.com/docs"},"feature_labels":{"agent_sdk":"Dedicated SDK for agentic workflows — agent sessions, token lifecycle, and authorization requests","token_delegation":"Issue scoped tokens an agent can use downstream without exposing user credentials","human_in_the_loop":"Pause agent execution and require explicit user approval before proceeding","fga":"Fine-Grained Authorization — relationship-based or attribute-based access control, not just role-based","mcp_support":"Native OAuth/OIDC authorization layer for Model Context Protocol servers","async_authorization":"Non-blocking approval workflows — agent continues and gets notified when approval is granted"},"comparisons":[{"slug":"auth0-vs-stytch","title":"Auth0 vs Stytch","vs":"auth0"},{"slug":"clerk-vs-stytch","title":"Clerk vs Stytch","vs":"clerk"},{"slug":"cognito-vs-stytch","title":"Amazon Cognito vs Stytch","vs":"cognito"},{"slug":"descope-vs-stytch","title":"Descope vs Stytch","vs":"descope"},{"slug":"firebase-auth-vs-stytch","title":"Firebase vs Stytch","vs":"firebase-auth"},{"slug":"keycloak-vs-stytch","title":"Keycloak vs Stytch","vs":"keycloak"},{"slug":"ory-vs-stytch","title":"Ory vs Stytch","vs":"ory"},{"slug":"stytch-vs-supabase-auth","title":"Stytch vs Supabase","vs":"supabase-auth"},{"slug":"stytch-vs-workos","title":"Stytch vs WorkOS","vs":"workos"}],"body":"# Stytch\n\nStytch is popular in AI startup stacks because it's API-first, flexible, and gets out of the way. It supports a wide range of authentication methods (magic links, OTP, OAuth, biometrics, passkeys) without forcing a specific UI pattern.\n\nFor agents, the relevant capabilities are M2M tokens, session management with long-lived sessions, and impersonation support. Token delegation is achievable through standard OAuth flows.\n\nStytch doesn't have purpose-built agent features like FGA or human-in-the-loop approval. It's a strong base layer for developers who want control and prefer to build agent authorization logic themselves rather than rely on SDK-level abstractions.\n\n**Agent-specific features:**\n- M2M tokens for agent service authentication\n- Flexible session management (useful for long-running agents)\n- Impersonation for agent-acting-as-user scenarios\n- OAuth token delegation through standard flows"}