Supabase Auth

Open source auth with PostgreSQL

Supabase Auth is the authentication module of the Supabase platform, offering a compelling combination of features and pricing. It integrates directly with your Supabase PostgreSQL database, enabling powerful Row Level Security (RLS) policies that control data access at the database level. The auth system supports all standard providers including social OAuth, magic links, phone auth, and passwords. What makes Supabase Auth unique is its open source nature - you can self-host the entire stack if needed. The generous free tier (50,000 MAU) is significantly higher than most competitors. While the pre-built UI components aren't as polished as Clerk's, the deep database integration and cost-effectiveness make it an excellent choice for projects already using Supabase.