Clerk Has a Free Authentication Platform — Add Login, Signup, and User Management in 5 Minutes

Why Clerk?

Clerk handles auth completely — UI components, session management, OAuth providers, MFA, organizations. You write zero auth code.

npm install @clerk/nextjs

Next.js Setup (3 Steps)

1. Wrap your app:

// app/layout.tsx
import { ClerkProvider, SignedIn, SignedOut, SignInButton, UserButton } from '@clerk/nextjs'

export default function Layout({ children }) {
  return (
    <ClerkProvider>
      <SignedOut><SignInButton /></SignedOut>
      <SignedIn><UserButton /></SignedIn>
      {children}
    </ClerkProvider>
  )
}

2. Protect routes:

// middleware.ts
import { clerkMiddleware } from '@clerk/nextjs/server'
export default clerkMiddleware()
export const config = { matcher: ['/dashboard(.*)'] }

3. Use in components:

import { currentUser } from '@clerk/nextjs/server'

export default async function Dashboard() {
  const user = await currentUser()
  return <h1>Hello {user?.firstName}</h1>
}

That's it. Full auth with OAuth, email/password, MFA — no auth code written.

Pre-Built Components

import { SignIn, SignUp, UserProfile } from '@clerk/nextjs'

<SignIn />       // Full login form with OAuth buttons
<SignUp />       // Registration form
<UserProfile />  // Account settings page

Clerk vs Auth0 vs NextAuth

Feature	Clerk	Auth0	NextAuth
UI components	Yes	Hosted	No
Setup time	5 min	30 min	1 hr
Free tier	10K users	7.5K users	Unlimited
Orgs/Teams	Yes	Enterprise	No

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