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Better-Auth vs NextAuth vs Clerk: The Auth Showdown for SaaS Builders

By Aziz Ali••
authenticationsaasbetter-authnextauthclerk
Better-Auth vs NextAuth vs Clerk: The Auth Showdown for SaaS Builders

I've rebuilt authentication from scratch more times than I care to admit. Every new SaaS project starts the same way: "I'll just wire up auth real quick." Three days later you're deep in OAuth callback hell, debugging session token edge cases at midnight, and your actual product hasn't seen a single line of code.

That frustration is exactly what pushed me to go deep on every major auth option before building BetterStarter. I needed to pick one and commit — and I wanted to make sure it was the right call for indie hackers and startup founders, not just the trendy choice.

Here's the honest breakdown of Better-Auth vs NextAuth vs Clerk — what each is actually like to use, where each one burns you, and why I landed on Better-Auth as the foundation for BetterStarter.

The Three Contenders

Before we get into the details, here's the quick character sketch:

  • NextAuth (Auth.js) — The OG. Free, open-source, battle-tested. But the DX in complex setups ranges from "fine" to "genuinely painful."
  • Clerk — Beautiful UI, zero-config magic, hosted everything. The monthly bill at scale will make your eye twitch.
  • Better-Auth — The new kid. Open-source, TypeScript-first, self-hosted, surprisingly full-featured. This is what I chose.

The Comparison Table You Came Here For

Better-Auth NextAuth (Auth.js) Clerk
Price Free (self-hosted) Free (self-hosted) Free up to 10k MAU, then $0.02–$0.05/user
Setup complexity Low-Medium Medium-High Low
TypeScript DX Excellent Okay Good
Database ownership ✅ Full ✅ Full ❌ Clerk-hosted
OAuth providers 30+ 50+ 20+
Magic links ✅ Built-in ✅ Via email provider ✅ Built-in
MFA / 2FA ✅ Built-in ⚠️ Plugin/manual ✅ Built-in
Passkeys ✅ Built-in ❌ ✅ Built-in
Session strategy JWT or DB JWT or DB Managed (JWT)
Custom UI ✅ Full control ✅ Full control ⚠️ Customizable but limited
Self-hosted ✅ Yes ✅ Yes ❌ No
Edge-compatible ✅ Yes ✅ Yes ✅ Yes
Active maintenance ✅ Very active ✅ Active ✅ Active
Best for Indie hackers, full-stack SaaS Quick prototypes Enterprise / funded startups

NextAuth: Free, Powerful, and Occasionally Maddening

NextAuth (now rebranded as Auth.js) has been the default choice for years. And it earns that status — it's stable, has a massive community, and supports every OAuth provider under the sun.

But using it for a production SaaS is a different story.

The Good

  • Free forever, no usage-based pricing surprises
  • Huge ecosystem and tons of StackOverflow answers
  • Works with any database via adapters (Drizzle, Prisma, etc.)
  • You own all user data completely

The Reality

Setting up NextAuth for anything beyond "login with GitHub" gets messy fast. Here's what a real credentials + OAuth + email magic link setup looks like:

// next-auth.config.ts (the trimmed version — real one is much longer)
import NextAuth from "next-auth"
import GitHub from "next-auth/providers/github"
import Credentials from "next-auth/providers/credentials"
import { DrizzleAdapter } from "@auth/drizzle-adapter"
import { db } from "@/db"

export const { handlers, auth, signIn, signOut } = NextAuth({
  adapter: DrizzleAdapter(db),
  providers: [
    GitHub,
    Credentials({
      credentials: {
        email: {},
        password: {},
      },
      authorize: async (credentials) => {
        // manual password hashing, user lookup, etc.
        const user = await getUserByEmail(credentials.email as string)
        if (!user) return null
        const valid = await bcrypt.compare(credentials.password as string, user.passwordHash)
        return valid ? user : null
      },
    }),
  ],
  callbacks: {
    session: ({ session, token }) => ({
      ...session,
      user: { ...session.user, id: token.sub },
    }),
  },
})

That's the simplified version. Add MFA, role-based access, organization/team support, and you're writing a ton of custom logic yourself. NextAuth won't hold your hand here.

The TypeScript types are also notoriously weak. Augmenting the Session type requires module declaration hacks that feel like fighting the library rather than using it.

The verdict on NextAuth: Solid for simple cases. Gets unwieldy fast when you need production-grade features. I used it on two projects before giving up.

Clerk: The Fastest Path to a Working Auth Screen

Clerk is genuinely impressive to demo. You drop in a <SignIn /> component, add two environment variables, and you have a beautiful, mobile-responsive auth UI with Google, GitHub, magic links, and MFA — all working in under 10 minutes.

I get why funded startups love it. Your UI team doesn't have to build login screens. Your backend team doesn't configure OAuth apps. It just works.

The Good

  • Zero config to get production-quality auth flows
  • Hosted user management dashboard (great for non-technical founders)
  • Built-in MFA, passkeys, device tracking
  • Excellent SDKs for React, Next.js, and more

The Pricing Reality Check

This is where I have to be straight with you. Clerk's free tier gives you 10,000 monthly active users (MAU). That sounds like a lot until it isn't.

At 10k MAU, you start paying $0.02/MAU on the Pro plan. That's $200/month for 10k users. At 50k MAU? You're at $1,000/month or more — just for auth. For a bootstrapped SaaS charging $29/month, that pricing structure can kill your margins.

And here's the other thing: your user data lives on Clerk's servers, not yours. You don't own the auth data directly. If Clerk has an outage, your users can't log in. If they change their pricing (they have, multiple times), you're in a renegotiation. If you ever want to migrate off, you're exporting CSVs and hoping for the best.

For enterprise companies with healthy ARR and dedicated engineering teams? Clerk is a no-brainer. For a solo founder building their second SaaS? The math doesn't work.

// Clerk setup (deceptively simple)
import { ClerkProvider } from "@clerk/nextjs"

export default function RootLayout({ children }) {
  return (
    <ClerkProvider>
      <html>
        <body>{children}</body>
      </html>
    </ClerkProvider>
  )
}

// Then in any component:
import { SignIn } from "@clerk/nextjs"
export default function Page() {
  return <SignIn />
}

It's beautiful. It's fast. And it'll cost you real money when you start getting traction.

The verdict on Clerk: Best-in-class DX, but the pricing model and data ownership make it a risky long-term bet for indie hackers. Great choice if you raise a seed round. Dangerous if you're bootstrapping.

Better-Auth: The One I Actually Chose

Better-Auth is newer than the other two, but don't let that fool you. The team has clearly done their homework — it's TypeScript-first from day one, ships with a ton of features out of the box, and the configuration model is one of the cleanest I've used.

Why Better-Auth Won Me Over

First: the TypeScript DX is genuinely excellent. Everything is typed end-to-end. The client and server share types automatically. You don't fight the type system — it actually helps you.

// better-auth setup (from BetterStarter's actual config)
import { betterAuth } from "better-auth"
import { drizzleAdapter } from "better-auth/adapters/drizzle"
import { twoFactor, magicLink, passkey } from "better-auth/plugins"
import { db } from "./db"

export const auth = betterAuth({
  database: drizzleAdapter(db, {
    provider: "pg",
  }),
  emailAndPassword: {
    enabled: true,
    requireEmailVerification: true,
  },
  socialProviders: {
    github: {
      clientId: process.env.GITHUB_CLIENT_ID!,
      clientSecret: process.env.GITHUB_CLIENT_SECRET!,
    },
    google: {
      clientId: process.env.GOOGLE_CLIENT_ID!,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET!,
    },
  },
  plugins: [
    twoFactor(),
    magicLink({
      sendMagicLink: async ({ email, url }) => {
        await sendEmail({ to: email, subject: "Your magic link", body: url })
      },
    }),
    passkey(),
  ],
})

That single config gives you: email/password auth with verification, GitHub OAuth, Google OAuth, TOTP-based 2FA, magic links, and passkeys. All typed. All your data, in your database.

Second: you own everything. User data is in your Drizzle (or Prisma) database, period. No external service holds your user records hostage. If Better-Auth disappeared tomorrow, your users would still exist in your DB and you'd migrate to something else with full control.

Third: the plugin system is additive, not a hack. MFA, magic links, passkeys, API keys, organization/team support — these are all first-class plugins that compose cleanly. You add them to the config, and the types update automatically across your whole app.

Fourth: it's free. Not "free tier with a gotcha". Free. Open-source. Self-hosted. Always.

The One Catch

Better-Auth is newer, so the community is smaller than NextAuth's. There are fewer StackOverflow answers and community tutorials. The official docs are solid, but if you run into a weird edge case, you might have to read source code.

That's a real tradeoff. But for an indie hacker who values ownership, TypeScript quality, and predictable costs, it's absolutely the right call.

The Indie Hacker's Actual Decision Framework

Here's the honest decision tree:

Use Clerk if:

  • You've raised funding and have engineering budget
  • Your team has no time to manage auth infrastructure
  • You're building enterprise B2B and need features like SAML/SSO fast
  • You don't care about data portability

Use NextAuth if:

  • You're building a quick prototype and have no time to learn something new
  • Your auth needs are simple (social login + maybe email/password)
  • You want maximum community resources

Use Better-Auth if:

  • You're an indie hacker or bootstrapped founder
  • You value owning your user data
  • You want a modern TypeScript DX without fighting the library
  • You need real features (MFA, magic links, passkeys) without paying per user
  • You're building on Drizzle ORM (the integration is seamless)

I chose Better-Auth because it's the choice I'd want someone to have made for me. When you're solo founding, every dollar and every hour matters. You can't afford $1k/month auth at 50k users. You can't afford to spend a week fighting NextAuth's type system. Better-Auth threads that needle.

How BetterStarter Ships Better-Auth Pre-Configured

When I built BetterStarter, I didn't just add Better-Auth as a dependency — I set it up the way I'd want it on a real project:

  • Email/password + Google + GitHub all wired up out of the box
  • Email verification on signup (with Resend integration)
  • TOTP-based 2FA ready to enable
  • Magic link support with one config change
  • Full Drizzle schema for auth tables included
  • Session helpers for both server components and API routes
  • Auth middleware protecting routes with a single import

This is weeks of configuration you get on day one. I've been through the auth setup dance enough times to know exactly what every production SaaS needs — and it's all pre-built in BetterStarter.

If you're curious about why BetterStarter uses TanStack Start rather than Next.js as the framework layer, I wrote about that decision in depth here: Why I Switched from Next.js to TanStack Start.

And if you're still deciding between boilerplates, here's an honest breakdown of the differences: BetterStarter vs ShipFast: Which SaaS Boilerplate Is Right for You?.

FAQ: Auth Library Comparisons for SaaS

Is Better-Auth production-ready in 2025?

Yes. Better-Auth is actively maintained, used in production by multiple teams, and ships with the features a real SaaS needs: MFA, magic links, OAuth, passkeys, and organization support. It's newer than NextAuth but moves faster and has better TypeScript support.

How much does Clerk cost for a growing SaaS?

Clerk's free tier covers 10,000 MAU. Beyond that, pricing starts at roughly $0.02/MAU on the Pro plan, meaning 50,000 MAU costs around $1,000/month — just for authentication. This is affordable for funded startups but often prohibitive for bootstrapped founders.

What's the difference between NextAuth and Auth.js?

They're the same project. Auth.js is the framework-agnostic rebrand of NextAuth v5, supporting Next.js, SvelteKit, SolidStart, and others. The API changed slightly in v5, so if you're migrating, read the upgrade guide carefully.

Can I migrate from Clerk to Better-Auth?

Yes, but it takes effort. Clerk hosts user data including hashed passwords (which they won't export in usable form), so you'll need to trigger password resets for existing users. OAuth users migrate more cleanly. It's doable, but better to start with Better-Auth from day one.

Does Better-Auth work with Drizzle ORM?

Yes — Better-Auth has a first-class Drizzle adapter that works with PostgreSQL, MySQL, and SQLite. It generates the auth tables automatically and integrates cleanly with your existing Drizzle schema. This is one of the main reasons I chose it for BetterStarter, which uses Drizzle as its default ORM.

Which auth library is best for indie hackers?

Better-Auth. It's free (no per-user pricing), open-source, self-hosted, TypeScript-first, and ships the features you actually need. Clerk is better for teams with budget. NextAuth works but shows its age in complex setups.

The Bottom Line

Auth is infrastructure. It's not your product. The goal is to get it right once, not to keep revisiting it every project.

  • NextAuth: Good enough, but you'll hit its ceilings.
  • Clerk: Best DX, but you'll pay dearly for scale and surrender data ownership.
  • Better-Auth: The right choice for indie hackers — modern DX, full ownership, free, and feature-complete.

I evaluated all three seriously before choosing Better-Auth for BetterStarter, and I haven't second-guessed it once. If you want to skip the evaluation entirely and just ship, BetterStarter has Better-Auth fully configured with email, OAuth, 2FA, and magic links — ready to deploy for a one-time $99.

Stop rewriting auth. Start shipping product.