Supabase Auth vs WorkOS

Supabase and WorkOS both provide authentication infrastructure. Supabase is an open-source Firebase alternative bundling authentication with PostgreSQL and Row Level Security. WorkOS is an identity platform with an Admin Portal for enterprise SSO and SCIM provisioning, Fine-Grained Authorization, and native MCP integration. WorkOS wins on enterprise B2B identity depth, FGA for document-level authorization, and MCP readiness; Supabase wins on integrated open-source BaaS, database-native Row Level Security, and cost efficiency.

Where Supabase wins

• Integrated Open-Source BaaS with Database-Native Authorization. Supabase combines authentication, PostgreSQL, real-time subscriptions, object storage, and Edge Functions in a single integrated stack. For PostgreSQL applications, this integration enables Row Level Security at the database level without additional application-layer authorization middleware. WorkOS is a standalone identity service without a database backend, requiring separate integration work to connect identity with data access patterns.

• Open-Source and Self-Hostable with No Per-Connection Pricing. Supabase can be self-hosted within your infrastructure with no per-user fees beyond infrastructure costs. WorkOS charges per enterprise SSO connection, a meaningful scaling concern for multi-tenant applications with many enterprise customers. Supabase's flat-rate self-hosted model avoids this cost pattern.

Where WorkOS wins

• Admin Portal for Enterprise SSO and SCIM. WorkOS provides a fully hosted Admin Portal enabling business customers to self-configure SAML SSO and SCIM directory sync connections without engineering involvement. Supabase provides no equivalent self-service enterprise identity onboarding workflow; you must implement enterprise SSO configuration flows and SCIM provisioning from scratch.

• Fine-Grained Authorization. WorkOS includes a built-in FGA engine enabling relationship-based access control for modeling complex, resource-level permissions beyond what standard RBAC can express. Supabase relies on PostgreSQL Row Level Security for data access control and provides no equivalent portable, application-layer FGA engine for enforcing document-level permission checks outside the database layer.

• AuthKit Drop-In UI with Free Tier Up to 1M MAUs. WorkOS provides AuthKit as a fully hosted, brandable authentication UI with free pricing up to one million monthly active users. Supabase's cloud pricing is competitive but lacks an equivalent hosted UI layer with the same free-tier threshold.

The agentic difference

WorkOS approaches agentic identity through two complementary layers. Its native MCP integration enables AI agents to authenticate against WorkOS as a standards-compliant authorization server. Its FGA engine provides relationship-based access control for enforcing document-level permissions in RAG pipelines, scoping what data an agent can retrieve based on per-resource access rules. WorkOS also provides a Vault for encrypted secret storage, though it functions as an encrypted key store rather than a fully managed outbound token vault that auto-refreshes OAuth credentials.

Supabase provides no agentic abstractions. It operates as a traditional, human-centric authentication and data platform with no native MCP server support, no outbound token vault, no agent lifecycle management, and no RAG pipeline authorization beyond PostgreSQL RLS. Neither platform supports CIBA for asynchronous human-in-the-loop authorization.

When to pick which

• Pick Supabase when building a greenfield PostgreSQL application needing integrated authentication, real-time data, and database-native access control in a single open-source platform, because its unified BaaS stack eliminates integration overhead that connecting WorkOS to a separate database would require.

• Pick Supabase when open-source self-hosting and freedom from per-connection pricing are requirements, because its self-hostable codebase provides complete infrastructure sovereignty without WorkOS's connection-based cost scaling for multi-tenant enterprise deployments.

• Pick WorkOS when building a B2B SaaS application requiring self-service enterprise SSO and SCIM provisioning for business customers, because its Admin Portal eliminates the custom development that Supabase's raw authentication primitives would require.

• Pick WorkOS when deploying AI agents needing document-level permission enforcement in RAG pipelines, because its FGA engine enables relationship-based access control and MCP integration provides standards-compliant agent authorization that Supabase lacks.