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Home / Migrations / Supabase Auth → Better Auth

Supabase Auth → Better Auth

medium

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.

What this migration involves

Moving from Supabase Auth to Better Auth is rated medium and takes about 4-8h on a typical project. The guide breaks it into 5 steps, 3 of which ship with runnable commands and 1 with a verification check.

Better Auth data →

Related migrations

Auth0 → Clerk — easy, 2-4h Auth0 → Better Auth — medium, 4-8h Clerk → Better Auth — medium, 4-8h NextAuth.js v4 → Auth.js v5 — medium, 2-4h Firebase Auth → Supabase Auth — medium, 4-8h NextAuth.js / Auth.js → Better Auth — medium, 3-6h

FAQ

How long does migrating from Supabase Auth to Better Auth take?

Around 4-8h for a typical project — 5 steps, difficulty rated medium, 3 of them with copy-paste commands.

Is moving from Supabase Auth to Better Auth reversible?

No reverse guide is tracked yet, so treat this as a one-way move and keep a full export of your Supabase Auth data before you start.

What does Better Auth cost compared to Supabase Auth?

Better Auth: open-source from $0/mo, free plan available.