Supabase: Open-Source Backend in Minutes
Auth, Postgres database, and storage — all in one platform.
Lesson Notes
Supabase is an open-source alternative to Firebase — it gives you a Postgres database, authentication, file storage, and auto-generated REST/GraphQL APIs. The most important feature for security is Row Level Security (RLS): SQL policies that run on every query and enforce who can read or write which rows. Always enable RLS on every table before you go live. Supabase pairs natively with Lovable, Cursor, and most AI builders — it's the backend of choice for the modern AI app stack.
Your Challenge
+15 XPCreate a Supabase project. Enable email/password authentication. Create a "profiles" table with columns: id (uuid, references auth.users), username (text), created_at. Enable Row Level Security and add a policy: "Users can only read and update their own profile." Test signup and profile creation.