Remix Guide Best Authentication for Remix (2026)
Compare the best authentication solutions for Remix. We review Clerk, Auth.js, Lucia, and more with loader/action integration and session management.
Remix has a unique approach to data loading with loaders and actions. Your auth solution needs to work seamlessly with this pattern—checking sessions in loaders, handling login in actions, and protecting routes without friction. The good news: most modern auth libraries have adapted well to Remix.
Why This Matters
Remix's server-first architecture means auth happens primarily on the server. Sessions, cookies, and route protection all flow through loaders. Unlike client-heavy frameworks, you're not fighting hydration issues or flashing unauthenticated content. But you need a library that understands this model.
Key Considerations
Loader/Action Integration
Can you easily check auth in loaders and handle login/logout in actions? Libraries with built-in Remix adapters make this seamless. Generic libraries require more boilerplate.
Session Management
Remix uses cookie sessions by default. Your auth library should work with Remix's session API or provide its own that integrates well. JWT vs session cookies matters here.
Managed vs Self-Hosted
Clerk and Auth0 are managed services with great Remix support. Remix Auth (Auth.js port) and Lucia are self-hosted. Managed = faster setup, self-hosted = more control.
Social Login Support
OAuth providers like Google, GitHub, Discord. All modern libraries support these, but implementation complexity varies. Managed services handle OAuth complexity for you.
Type Safety
Remix is TypeScript-first. Your auth library should provide type-safe session data, user types, and loader helpers without type assertions everywhere.
Our Recommendations
Clerk
Best Overall Excellent Support Official SDKClerk has first-class Remix support with getAuth() in loaders and pre-built components. Handles the complexity of OAuth, MFA, and session management. Free tier (10k MAU) is generous. The fastest way to add auth to a Remix app.
npm install @clerk/remix 
Auth.js
Best Self-Hosted Good Support Official SDKAuth.js (Remix Auth) brings NextAuth.js patterns to Remix. Self-hosted, open source, full control over your user data. Requires more setup than Clerk but gives you independence. Good adapter ecosystem for different databases.
npm install remix-auth remix-auth-form 
Supabase Auth
Best with Supabase Good Support Official SDKIf you're using Supabase as your database, their auth integrates tightly. SSR helpers work with Remix loaders. Row-level security ties auth to data access. Free tier includes unlimited users.
npm install @supabase/supabase-js @supabase/ssr 
Kinde
Best Free Tier Good Support Official SDKKinde offers 10,500 MAU free with good Remix support. A solid Clerk alternative with competitive pricing. Growing quickly with good documentation. Worth considering for cost-conscious projects.
npm install @kinde-oss/kinde-remix-sdk 
Auth0
Best for Enterprise Good Support Official SDKAuth0 is enterprise-ready with SAML, LDAP, and advanced security. Remix SDK works well. More complex than Clerk but has features large organizations need. Best for B2B apps needing enterprise SSO.
npm install @auth0/remix-auth Quick Comparison
| Service | TypeScript | Edge | Free Tier | Setup Time |
|---|---|---|---|---|
| Clerk | full | ✓ | 10k MAU | 10 min |
| Auth.js | full | ✓ | Unlimited (self-hosted) | 30 min |
| Supabase Auth | full | ✓ | 50k MAU | 15 min |
| Kinde | full | ✓ | 10.5k MAU | 15 min |
| Auth0 | full | ✓ | 7k MAU | 20 min |
Quick Start
import { getAuth } from '@clerk/remix/ssr.server';
import { redirect, LoaderFunctionArgs } from '@remix-run/node';
export async function loader({ request }: LoaderFunctionArgs) {
const { userId } = await getAuth(request);
if (!userId) {
return redirect('/sign-in');
}
// User is authenticated, fetch their data
const userData = await db.user.findUnique({ where: { clerkId: userId } });
return { user: userData };
}
export default function Dashboard() {
const { user } = useLoaderData<typeof loader>();
return <div>Welcome, {user.name}!</div>;
}Common Integration Patterns
Clerk + Prisma + PostgreSQL
Clerk handles auth, sync user data to PostgreSQL via webhooks, query with Prisma. Standard full-stack pattern for Remix apps.
Remix Auth + Prisma + SQLite
Self-hosted auth with Remix Auth, SQLite database (local first), Prisma ORM. Fully open source stack, great for indie hackers.
Supabase Full Stack
Supabase for auth, database, and storage. Single provider, row-level security ties auth to data. Simplest setup for Remix.