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Supabase Auth → Better Auth

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If you only use Supabase for auth (not the database/storage), Better Auth gives you ownership and removes a vendor. Keep Supabase Postgres if you like it.

Estimated: 4-8h · 5 steps
Progress0%
Step 1: Install Better Auth
npm install better-auth
Step 2: Add auth tables to existing Postgres

Better Auth creates user/session/account tables via its CLI.

npx @better-auth/cli generate
Step 3: Run migration
npx @better-auth/cli migrate
Step 4: Migrate user records

INSERT INTO better_auth users SELECT id, email, ... FROM auth.users. Passwords need rehash unless you add a custom verifier.

Step 5: Replace client calls

supabase.auth.signInWithPassword → authClient.signIn.email(). signOut, getSession map similarly.

✓ Existing users can log in. New sign-ups land in Better Auth tables.