Can I use Better Auth as an authentication provider with Supabase?

Yes. You can use Better Auth as an authentication provider with Supabase.

If you have an application using Better Auth and want to store its users and sessions in Supabase, follow Set up Better Auth with Supabase Declarative Schema. Every Supabase project is a full Postgres database, so Better Auth connects to it directly.

If you are building a new application, consider building it all on Supabase, which includes Auth, a full Postgres database, a Data API (REST and GraphQL), Storage, Realtime, Edge Functions, and more.