Corbel

Corbel is aimed at products that sell to companies with procurement checklists. It ships SAML and OIDC single sign-on, SCIM user provisioning, an audit log with CSV export, domain verification, per-seat Stripe billing with invoices, and a role editor so customers can define their own permissions. The admin area tracks accounts, contract dates and seat usage.

The kit is opinionated about multi-tenancy with a tenant ID on every table and a query helper that refuses to run without one. That rule is annoying for an hour and then saves you from the worst kind of data leak. The limitation: it is heavy for an early MVP. If you have no customers asking for SSO yet, most of this is code you will maintain without using.