Full Stack Authentication in 2026 with Better Auth, Drizzle, Neon, Shadcn UI, and Next.js

Authentication has changed a lot in the last few years.

There was a time when building auth meant spending hours configuring Passport.js, manually hashing passwords, creating session tables, dealing with OAuth providers, and debugging cookies at 2 AM because nothing worked in production. Then came solutions like NextAuth which made things easier, but modern full stack apps now demand something cleaner, faster, and more developer-friendly.

In 2026, the stack many developers are starting to love looks something like this:

Next.js for the frontend and backend
Better Auth for authentication
Drizzle ORM for database management
Neon for serverless PostgreSQL
Shadcn UI for beautiful components

This stack feels modern in the best possible way. Minimal boilerplate, type safety everywhere, clean developer experience, and performance that actually scales.

In this article, we are going to build and understand a modern authentication system using all of these technologies together.

Not just “copy-paste this code and pray” type auth.

We will understand how the entire flow works from frontend to database.

Why This Stack Makes Sense

Before jumping into code, let’s understand why developers are moving toward this stack.

Next.js

Next.js has become the default framework for React developers. App Router, Server Actions, Route Handlers, Streaming, and React Server Components make it extremely powerful for full stack applications.

Instead of maintaining separate frontend and backend projects, you can build everything in one place.

Better Auth

Better Auth is becoming popular because it feels like authentication designed for modern TypeScript applications.

It gives you:

Email/password authentication
OAuth providers
Session handling
Type safety
Better developer experience
First-class support for modern frameworks

The biggest advantage is simplicity.

You spend less time configuring authentication and more time building your product.

Drizzle ORM

Drizzle ORM is probably one of the cleanest ORMs in the JavaScript ecosystem right now.

Instead of hiding SQL from you, it embraces SQL while still giving type safety.

A lot of developers are moving away from overly abstract ORMs because eventually you still need to understand SQL anyway.

Drizzle feels lightweight, predictable, and fast.

Neon Database

Neon is a serverless PostgreSQL platform.

What makes Neon interesting is that it separates compute and storage, which means your database can scale dynamically and work extremely well with serverless deployments like Vercel.

You get PostgreSQL without managing infrastructure headaches.

Shadcn UI

Shadcn UI changed how developers think about UI libraries.

Instead of installing a giant component package, you copy components directly into your project and fully own them.

This means:

Easier customization
Cleaner codebase
Better control
No fighting component libraries

For authentication pages, this becomes incredibly useful.

Setting Up the Project

First create a Next.js application.

npx create-next-app@latest

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During setup:

✔ TypeScript → Yes
✔ ESLint → Yes
✔ Tailwind CSS → Yes
✔ App Router → Yes
✔ src directory → Yes

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Now install the required dependencies.

npm install better-auth drizzle-orm drizzle-kit postgres

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For Shadcn UI:

npx shadcn@latest init

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Then install components you need:

npx shadcn@latest add button input card form label

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Creating the Neon Database

Go to:

https://neon.tech

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Create a PostgreSQL database.

After creating the project, Neon will give you a database connection string.

It looks something like this:

DATABASE_URL="postgresql://user:password@host/dbname?sslmode=require"

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Add this inside your .env file.

DATABASE_URL=""
BETTER_AUTH_SECRET=""
BETTER_AUTH_URL="http://localhost:3000"

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Generate a secure secret:

openssl rand -base64 32

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Configuring Drizzle ORM

Create a drizzle.config.ts file.

import type { Config } from "drizzle-kit"

export default {
  schema: "./src/db/schema.ts",
  out: "./drizzle",
  dialect: "postgresql",
  dbCredentials: {
    url: process.env.DATABASE_URL!,
  },
} satisfies Config

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Creating Database Schema

Now create your schema.

src/db/schema.ts

import {
  pgTable,
  text,
  timestamp,
} from "drizzle-orm/pg-core"

export const users = pgTable("users", {
  id: text("id").primaryKey(),
  name: text("name").notNull(),
  email: text("email").notNull().unique(),
  password: text("password").notNull(),
  createdAt: timestamp("created_at")
    .defaultNow()
    .notNull(),
})

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This creates a strongly typed users table.

One of the best things about Drizzle is that your database schema becomes fully integrated with TypeScript.

Creating the Database Client

src/db/index.ts

import { drizzle } from "drizzle-orm/postgres-js"
import postgres from "postgres"

const queryClient = postgres(process.env.DATABASE_URL!)

export const db = drizzle(queryClient)

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Running Migrations

Generate migration files.

npx drizzle-kit generate

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Push schema to Neon.

npx drizzle-kit migrate

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Now your PostgreSQL database is ready.

Setting Up Better Auth

Create:

src/lib/auth.ts

import { betterAuth } from "better-auth"
import { drizzleAdapter } from "better-auth/adapters/drizzle"
import { db } from "@/db"

export const auth = betterAuth({
  database: drizzleAdapter(db),

  emailAndPassword: {
    enabled: true,
  },
})

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This is where Better Auth starts feeling refreshing.

The setup is surprisingly small compared to older authentication solutions.

Creating the API Route

Inside App Router:

src/app/api/auth/[...all]/route.ts

import { auth } from "@/lib/auth"
import { toNextJsHandler } from "better-auth/next-js"

export const { GET, POST } = toNextJsHandler(auth)

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And that’s basically your authentication backend ready.

No massive configuration files.

No complex setup.

No endless middleware confusion.

Creating the Auth Client

src/lib/auth-client.ts

import { createAuthClient } from "better-auth/react"

export const authClient = createAuthClient({
  baseURL: "http://localhost:3000",
})

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Building the Signup Page

Now let’s create a clean signup form using Shadcn UI.

src/app/signup/page.tsx

"use client"

import { useState } from "react"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Card, CardContent } from "@/components/ui/card"
import { authClient } from "@/lib/auth-client"

export default function SignupPage() {
  const [loading, setLoading] = useState(false)

  async function handleSignup(
    e: React.FormEvent<HTMLFormElement>
  ) {
    e.preventDefault()

    setLoading(true)

    const formData = new FormData(e.currentTarget)

    const name = formData.get("name") as string
    const email = formData.get("email") as string
    const password = formData.get("password") as string

    await authClient.signUp.email({
      name,
      email,
      password,
    })

    setLoading(false)
  }

  return (
    <div className="flex min-h-screen items-center justify-center">
      <Card className="w-[400px]">
        <CardContent className="space-y-4 pt-6">
          <form
            onSubmit={handleSignup}
            className="space-y-4"
          >
            <Input
              name="name"
              placeholder="Name"
            />

            <Input
              name="email"
              type="email"
              placeholder="Email"
            />

            <Input
              name="password"
              type="password"
              placeholder="Password"
            />

            <Button
              className="w-full"
              disabled={loading}
            >
              {loading
                ? "Creating account..."
                : "Create Account"}
            </Button>
          </form>
        </CardContent>
      </Card>
    </div>
  )
}

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This is where Shadcn UI shines.

The components look modern immediately, but you still fully control the code.

You are not trapped inside somebody else’s design system.

Adding Login Functionality

await authClient.signIn.email({
  email,
  password,
})

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That’s it.

Sessions are automatically handled by Better Auth.

Getting the Current User

Inside a server component:

import { auth } from "@/lib/auth"

const session = await auth.api.getSession({
  headers: headers(),
})

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Now you can protect routes, show user dashboards, or create authenticated APIs.

Protecting Routes

Example:

if (!session) {
  redirect("/login")
}

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Simple and clean.

This is one of the biggest advantages of modern Next.js authentication.

Authentication logic can live directly on the server.

Why This Stack Feels Different

After using this stack for a while, you start noticing something.

You spend less time fighting tooling.

That sounds small, but it changes everything.

A lot of older authentication systems felt like layers of hacks built on top of each other. You constantly searched documentation, patched issues, and debugged strange edge cases.

This stack feels more aligned with how modern TypeScript applications are actually built.

Everything connects naturally:

Next.js handles the application architecture
Better Auth handles authentication
Drizzle handles the database layer
Neon handles infrastructure
Shadcn handles UI

Each tool does one thing well.

That creates a development experience that feels surprisingly smooth.

Things You Should Add in Production

The tutorial above is the foundation, but production applications usually need more.

OAuth Providers

You can add:

Google Login
GitHub Login
Discord Login

Example:

socialProviders: {
  github: {
    clientId: process.env.GITHUB_CLIENT_ID!,
    clientSecret: process.env.GITHUB_CLIENT_SECRET!,
  },
}

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Email Verification

Never trust unverified emails in real applications.

Implement:

Email verification
Password reset
Magic links

Rate Limiting

Authentication routes are common attack targets.

Use:

Arcjet
Upstash Redis
Middleware rate limiting

Better Password Security

Always ensure:

Strong password validation
Secure session management
HTTPS in production
Environment variable protection

Final Thoughts

The modern web development ecosystem is finally becoming enjoyable again.

For a long time, full stack authentication felt unnecessarily complicated. Developers accepted complexity because there were no better alternatives.

But stacks like Next.js + Better Auth + Drizzle + Neon + Shadcn UI show that things are changing.

You can now build production-ready authentication systems that are:

Type-safe
Fast
Clean
Scalable
Developer-friendly

And maybe the best part is this:

The stack stays out of your way.

You focus more on building products and less on wrestling with infrastructure.

That is probably the biggest upgrade modern development has brought.