Managed Better Auth provides a Supabase-compatible API, and Neon Data API provides PostgreSQL database access. This guide shows how to migrate from Supabase to Neon.

#### About user migration

Existing password-based users cannot migrate due to different hashing algorithms. They'll need to create new accounts or re-authenticate via OAuth. This guide works best for new projects, early development, or rebuilding your app.

## Prerequisites

- A Neon project ([create one here](https://console.neon.tech/))

- Data API enabled (Managed Better Auth is enabled by default when you enable Data API):

  - Go to **Postgres database** > **Data API** in the Neon Console and enable it
  - In **Data API → Configuration**, verify it's configured with **Managed Better Auth**
  - Copy your Neon connection host and database name from **Connect** in the Console. The SDK derives both the Auth and Data API URLs from this single base URL. See [Initialize the client](/guides/postgres-reference-javascript-sdk#initialize-the-client) for the derivation rules, or use the separate Auth and Data API base URLs instead if you'd rather configure them explicitly

::::steps
:::step{title="Install Neon SDK"}
Replace the Supabase SDK with Neon's:

```bash
npm uninstall @supabase/supabase-js
npm install @neondatabase/neon-js@latest
```
:::

:::step{title="Update environment variables"}
Replace your Supabase credentials with a single Neon base URL. `createClient()` derives both the Auth and Data API URLs from it automatically:

```bash title=".env"
# Remove these:
# VITE_SUPABASE_URL=https://your-project.supabase.co
# VITE_SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...

# Add this:
VITE_NEON_URL=https://ep-xxx.c-2.us-east-2.aws.neon.build/dbname
```

**Get your URL:**

Your Neon base URL is the host and database name from your Neon connection string, served over `https://`. Find these values under **Connect** in the Neon Console.

#### note

The `VITE_` prefix is for Vite. Use `NEXT_PUBLIC_` for Next.js, or no prefix for Node.js.

#### tip

If you already copied separate Auth and Data API base URLs from the Console (for example, from an earlier setup), you can still pass them explicitly with the object form. See [Initialize the client](/guides/postgres-reference-javascript-sdk#initialize-the-client) for both forms.
:::

:::step{title="Update client initialization"}
Find your Supabase client file, typically `src/supabase.ts` or `src/lib/supabase.ts`, and update it:

**Before (Supabase):**

```typescript title="src/supabase.ts"
import { createClient } from '@supabase/supabase-js';

export const supabase = createClient(
  process.env.VITE_SUPABASE_URL!,
  process.env.VITE_SUPABASE_ANON_KEY!
);
```

**After (Neon):**

```typescript title="src/auth.ts"
import { createClient, SupabaseAuthAdapter } from '@neondatabase/neon-js';

export const client = createClient(import.meta.env.VITE_NEON_URL, {
  auth: { adapter: SupabaseAuthAdapter() },
});
```

This example renames the file to `auth.ts` and the variable to `client` for a provider-agnostic setup. You can use any naming, just stay consistent throughout your codebase.

Find **all files that import this client** and update them:

```typescript
// Before
import { supabase } from './supabase';

// After
import { client } from './auth';
```
:::

:::step{title="Your auth code stays the same"}
After updating imports, use find/replace to change all instances throughout your codebase:

**`supabase.` → `client.`**

Your authentication methods, parameters, and responses work identically. Your components, hooks, and auth flows don't change.

```typescript title="Auth methods"
// Sign up
await client.auth.signUp({ email, password });

// Sign in with password
await client.auth.signInWithPassword({ email, password });

// OAuth sign in
await client.auth.signInWithOAuth({ provider: 'google' });

// Get current user
const {
  data: { user },
} = await client.auth.getUser();

// Get session
const {
  data: { session },
} = await client.auth.getSession();

// Sign out
await client.auth.signOut();
```
:::

:::step{title="Your database queries stay the same"}
Your existing `client.from()` queries work without any code changes:

```typescript
// Same as Supabase - no changes needed
const { data: posts } = await client.from('posts').select('*');
const { data: user } = await client.from('users').select('*').eq('id', userId).single();
```

#### note

For production apps, use Row Level Security (RLS) to secure your data. See our [RLS with Drizzle guide](/guides/postgres-guides-rls-drizzle) for the recommended setup.
:::

:::step{title="Test the migration"}
Run your app:

```bash
npm run dev
```

**Test your app:**

1. Sign up a new user
2. Sign in with that user
3. Verify the session persists across page reloads
4. If you enabled Data API: Test user actions that involve database queries (creating posts, loading lists, etc.)

Your authentication and database queries should work the same as they did with Supabase.

**Verify users in Neon Console:**

Go to **Auth → Users** in the Neon Console to see your newly created users, or query directly:

```sql title="SQL Editor"
SELECT id, email, "createdAt"
FROM neon_auth.user
ORDER BY "createdAt" DESC;
```
:::
::::

## What changed?

| Feature                   | Supabase                            | Neon                                                |
| ------------------------- | ----------------------------------- | --------------------------------------------------- |
| **User ID type**          | `UUID`                              | `UUID`                                              |
| **Client config**         | URL + anon key                      | Single base URL (auto-derives Auth + Data API URLs) |
| **Environment variables** | `SUPABASE_URL`, `SUPABASE_ANON_KEY` | `NEON_URL`                                          |
| **SDK package**           | `@supabase/supabase-js`             | `@neondatabase/neon-js`                             |

## API compatibility

Managed Better Auth supports most Supabase Auth methods including sign up, sign in (password and OAuth), session management, user updates, and email verification. See the [Neon TypeScript SDK](/guides/postgres-reference-javascript-sdk) for the complete API.

**Not supported:**

| Method              | Details                             |
| ------------------- | ----------------------------------- |
| `signInWithPhone()` | Phone authentication (SMS/WhatsApp) |
| SAML SSO methods    | Enterprise SAML authentication      |
| Web3 authentication | Blockchain wallet sign-in           |

**Different behavior:**

| Method             | Notes                                                                                                                                                                                                                  |
| ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `updateUser()`     | Does not support `password` or `email` parameters                                                                                                                                                                      |
| Email verification | Unlike Supabase's automatic verification flow, Managed Better Auth requires you to build the verification UI in your app. See [Email Verification](/guides/auth-guides-email-verification) for implementation details. |

If you're using any unsupported methods or verification flows, you'll need to adjust your implementation.

## Need help?

Join our [Discord Server](https://neon.com/discord) to ask questions or see what others are doing with Neon. For paid plan support options, see [Support](/guides/postgres-introduction-support).

## Related pages

- [From Auth SDK v0.1](./auth-migrate-from-auth-v0-1.md)
- [Migrate to Managed Better Auth](./auth-migrate-from-legacy-auth.md)

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