Clerk | Authentication and User Management

More than APIs. The complete user layer for modern apps.
Auth that keeps evolving
Ever feel like authentication requirements change with the season? Clerk keeps up with the latest trends and security best practices.
Everything your B2B SaaS needs
Clerk has all the features you need to onboard and manage the users and organizations of your multi-tenant SaaS application.
Clerk’s architecture is built with agents in mind. Thinner SDKs and integrations mean fewer AI tokens are required to build and leverage our secure infrastructure.
Let your agent configure your Clerk app’s settings, users, and domains.
No prompts to get stuck on, and results come back as JSON.
Claude Code, Codex, Cursor, and more set up Clerk from a single prompt.
Build with SDKs for modern frameworks
Clerk keeps developer experience front-and-center by providing helpful SDKs for most modern frameworks on web and mobile.
Integrate with the tools you love
Leverage Clerk as the source of truth for your user data and integrate with the tools that you already depend on.
Trusted around the world
Join the customers and champions who trust Clerk. Free for your first 50,000 monthly retained users and 100 monthly retained orgs.
Clerk's integration gives Supabase developers another incredible option for handling authentication. And the Clerk team are a pleasure to work with.
The best practices built-in to their <SignIn /> and <UserButton /> components would take months to implement in-house, yet no sacrifice is made in terms of Enterprise extensibility or customization to your brand.
We're big admirers of what the @clerk team are building and looking forward to working more closely with them.
This is why I like using an auth service like Clerk.
I rolled my own auth and this is the amount of code I needed just to setup 2 OAuth providers, magic link, credential login, account joining. I haven't even added forgot password flow yet, and my code is probably filled with vulnerabilities.
btw, you don't need to remind me that Laravel has all of this out of the box, we all know already.
The @clerk CLI is really good
Authentication used to be such a nightmare, but the CLI makes things very easy
Setting up authentication has always been a pain, even with agentic coding (plz never ask your agent to spin up your own custom auth).
I really gotta give it to @clerk for providing the best/easiest integration to automatically set up auth for our users building applications on @predotdev .
Shout out to @brkalow and the team for making this a seamless experience for our users.
Both pre.dev and clerk.com are free to get started!
Best auth solution for startups?
1) Clerk2) Firebase Auth3) Supabase4) Custom auth (💀)
Stop copy-pasting tutorials and pick one. Stick with it.
What's the best auth for SaaS?
1. Clerk2. Auth03. Supabase Auth4. Custom Auth
Stop copy-pasting tutorials and pick one. Stick with it.
Before moving to @clerk, we had working auth
After moving to Clerk, we also have:- Mobile support- Auth on Vercel preview domains- OAuth tokens that actually refresh- Middleware-level auth validation (no more "sign in" button flash!)- Organizations with built-in UI for adding users- Google OAuth UI compliance (we were rejected for this for months, obnoxious)...