Why AI startups choose Supabase and where it falls short - Logto blog

## Supabase's limitations and considerations While Supabase is a powerful and developer-friendly backend platform, offering database, storage, authentication, and serverless functions out of the box but it has notable limitations when it comes to **enterprise-grade identity and authorization**. ### No OIDC provider support Supabase **does not support acting as an OpenID Connect (OIDC) Provider**. This means: - You cannot use Supabase to **federate identity to other systems**, i.e. it cannot serve as a central identity provider for other applications. - Supabase **cannot issue standards-compliant ID tokens** for third-party clients to consume. - It lacks support for **custom claims**, **token introspection**, **scoped access**, or fine-grained session/token management, all of which are essential for OAuth 2.1 / OIDC-compliant systems. … Especially in the AI era, if you want your product to work with AI agents or act as an MCP server, it needs to support OAuth or OIDC. Without this, your product can’t participate in the OAuth-based ecosystem that AI agents rely on, which means missing out on major integration opportunities. ### Weak authorization model (RBAC/ABAC) Supabase also lacks a built-in authorization framework: - There is no native RBAC (role-based access control) system for assigning roles to users or defining permissions. - You must manually implement authorization logic using PostgreSQL Row-Level Security (RLS): a powerful but low-level feature that’s difficult to manage as your product scales. - There is no organization/team hierarchy, no user-role mapping UI, and no ability to apply conditional access policies based on roles, tenant ownership, or permissions. - There’s no concept of access scopes or policies bound to tokens, making it hard to integrate with secure APIs or microservices. This makes Supabase less suitable for **multi-tenant SaaS products**, **B2B platforms**, or anything requiring enterprise-grade access control. … ### Summary: Where Supabase falls short |**Capability**|**Supabase Status**|**Limitation**| |--|--|--| |OIDC Provider|❌ Not supported|Cannot expose user pool to third-party apps| |Token Customization|❌ Minimal|No custom claims, scopes, or introspection| |RBAC|❌ Manual via RLS|No native roles/permissions system| |Org/Tenant Hierarchy|❌ Not supported|No built-in support for orgs, teams, or role mapping| |Visual Policy Management|❌ Missing|Must manage all logic via SQL/RLS manually| In short, Supabase excels at providing a developer-first backend experience, but when it comes to **secure identity, SSO, and advanced authorization**, it lacks the primitives and abstractions that modern applications demand. If your product involves **multi-tenant auth**, **enterprise SSO**, or **fine-grained access control**, pairing Supabase with a purpose, built identity solution is not just recommended. ### Migration path for growing companies Many AI companies view Supabase as an excellent starting point but plan eventual migration to more specialized services as they scale. This "graduate and migrate" pattern is common, where startups begin with Supabase for speed, then move to enterprise solutions for advanced features.