Auth.js vs SuperTokens

Side-by-side — pricing, strengths, tradeoffs, and fit.

Auth.js

Open-source authentication for the web (formerly NextAuth.js), free and framework-native.

SuperTokens

Open-source authentication you can self-host, with prebuilt UI and session management.

At a glance

Open SourceFree Tier
● Established·From $0
Open SourceFree TierEnterprise
● Established·From $0 self-hosted

Overview

One-liner

Open-source authentication for the web (formerly NextAuth.js), free and framework-native.

One-liner

Open-source authentication you can self-host, with prebuilt UI and session management.

Maturity

Established

Maturity

Established

Open source

✓ Yes

Open source

✓ Yes

Pricing

Free tier

✓ Available

Fully free and open source

Free tier

✓ Available

Self-hosted is free; managed has a free tier to 5,000 MAU

Starts at

$0

Starts at

$0 self-hosted

Model

Flat rate

Model

Flat rate

Enterprise

✕ None

Enterprise

✓ Available

Best for

✓ Best for

Next.js apps wanting free, self-hosted authNative integration, no per-user cost
Developers comfortable owning auth plumbingFull control over sessions and providers

✓ Best for

Teams wanting open-source, self-hosted authNo vendor lock-in or per-user fees
Data-residency / privacy-sensitive appsKeep user data in your own infrastructure

Not ideal for

✕ Not for

—

✕ Not for

—

Strengths

↑ Strengths

Free and open source
First-class Next.js integration
Many OAuth providers built in

↑ Strengths

Open source and self-hostable
Prebuilt UI + session management
Transparent pricing

Weaknesses

↓ Weaknesses

Token rotation is broken, causing new tokens from external IDPs to be lost and old tokens to be reused indefinitely.
The v5 release is in beta with unclear stability and security implications for production use.
Session state is not updated on the client side after sign-out, requiring manual page reloads.
JWT modification for refreshing access tokens is not possible after initial login.

↓ Weaknesses

Smaller ecosystem than Auth0/Clerk
Self-hosting adds ops burden
Full Auth.js profile →Full SuperTokens profile →