Supabase Auth vs Clerk vs NextAuth (2026 Comparison)

Three auth approaches for Next.js. Supabase Auth comes free with your database. Clerk is the premium managed option. NextAuth (Auth.js) is open-source and self-hosted. Here's which to pick.

Quick Verdict

• Supabase Auth — Best value. Free auth bundled with database, storage, and real-time.
• Clerk — Best DX. Pre-built components. Fastest to production.
• NextAuth (Auth.js) — Best control. Free, open source, no vendor lock-in.

Pricing

	Supabase Auth	Clerk	NextAuth
Free tier	50,000 MAU	10,000 MAU	Unlimited
Paid	Included in Supabase Pro ($25/mo)	$0.02/MAU	Free forever
At 50K MAU	$25/mo (total)	$800/mo	$0
At 100K MAU	$25/mo (total)	$1,800/mo	$0

Supabase Auth is dramatically cheaper — 50K MAU free, and auth stays free on paid Supabase plans. NextAuth is free forever. Clerk is expensive at scale.

Setup Time

Supabase Auth (~15 minutes)

import { createClient } from '@supabase/supabase-js'

const supabase = createClient(url, anonKey)

// Sign up
await supabase.auth.signUp({ email, password })

// Sign in
await supabase.auth.signInWithPassword({ email, password })

// OAuth
await supabase.auth.signInWithOAuth({ provider: 'google' })

// Get user
const { data: { user } } = await supabase.auth.getUser()

Clerk (~5 minutes)

import { SignIn, UserButton } from '@clerk/nextjs'

// Drop-in components
<SignIn />
<UserButton />

// Server-side
const { userId } = auth()

NextAuth (~30 minutes)

// app/api/auth/[...nextauth]/route.ts
import NextAuth from 'next-auth'
import Google from 'next-auth/providers/google'
import Credentials from 'next-auth/providers/credentials'

export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [
    Google({ clientId: '...', clientSecret: '...' }),
    Credentials({
      credentials: { email: {}, password: {} },
      authorize: async (credentials) => {
        const user = await verifyUser(credentials)
        return user
      },
    }),
  ],
  adapter: DrizzleAdapter(db),
})

Clerk is fastest. Supabase is quick. NextAuth requires the most setup.

Features

Feature	Supabase Auth	Clerk	NextAuth
Email/password	✅	✅	✅
OAuth	✅ (20+ providers)	✅ (20+ providers)	✅ (80+ providers, most)
Magic links	✅	✅	✅
Phone/SMS auth	✅	✅	❌
MFA	✅	✅	❌ (DIY)
Pre-built UI	❌ (use @supabase/auth-ui-react)	✅ Best	❌ (DIY)
Organizations	❌	✅ Built-in	❌ (DIY)
User management dashboard	✅ (Supabase dashboard)	✅ (dedicated)	❌
RLS integration	✅ (native)	❌	❌
Self-hosting	✅	❌	✅
Webhooks	✅	✅	Callbacks
Session strategy	JWT + cookie	JWT	JWT or database

The Key Differentiators

Supabase Auth: Database Integration

Auth is tightly integrated with your Supabase database. Row-Level Security (RLS) policies use auth.uid() directly:

CREATE POLICY "Users can only see their own data"
ON todos FOR SELECT
USING (auth.uid() = user_id);

No middleware needed. The database enforces access control.

Clerk: Pre-Built Everything

Organizations, user profiles, and session management — all pre-built React components. Fastest to production for B2B SaaS.

NextAuth: Maximum Flexibility

80+ OAuth providers. Database adapters for any database. Full control over session handling, callbacks, and auth flow. No vendor lock-in.

When to Use Each

Choose Supabase Auth When

• Already using Supabase for database
• Want auth + database + storage in one platform
• Budget-conscious (cheapest option at scale)
• Need RLS integration
• Don't need organizations/teams feature

Choose Clerk When

• Need organizations and team management
• Want the fastest setup with pre-built UI
• B2B SaaS with user management needs
• Budget allows per-MAU pricing
• DX is the top priority

Choose NextAuth When

• Want zero vendor lock-in
• Need maximum OAuth provider support
• Self-hosting is required
• Budget is zero
• Want full control over auth flow

FAQ

Can I use Supabase Auth without the rest of Supabase?

Technically yes, but it doesn't make sense. Supabase Auth's value is integration with the database and RLS.

Is NextAuth secure?

Yes, when configured correctly. It's widely used in production. You're responsible for proper session management and secret rotation.

Can I migrate between these?

Supabase → Clerk: possible but passwords can't migrate. NextAuth → anything: easier since you own the data. Clerk → anything: hardest due to vendor lock-in.

Bottom Line

Supabase Auth if you're using Supabase (free, integrated, RLS). Clerk if you need pre-built UI and organizations (premium DX). NextAuth if you want free, flexible, no-vendor-lock-in auth. For most Next.js startups: Supabase Auth (best value) or Clerk (best DX).