Clerk
An authentication and user management platform
Stack Auth
Open-source Auth0/Clerk Alternative
Updated February 2026
| Clerk | Stack Auth | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 76 | 4 |
| Pros | 19 | 0 |
| FactScore™ | 94.3 | 34.9 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Clerk — Pros
Easy integration Comprehensive solution Free tier Fast setup Flexible auth Prebuilt UI components Developer APIs Secure login flows Beautiful components Generous free tier OAuth support Admin dashboard B2B use cases Customer support Excellent documentation Next.js integration Seamless integration Social logins Web 3.0 integrationBoth tools — Pros
—Only in Stack Auth — Pros
No unique pros listedOnly in Clerk — Cons
Native-app hiccupsBoth tools — Cons
—Only in Stack Auth — Cons
—Details
| Clerk | Stack Auth | |
|---|---|---|
| Categories | Authentication & identity tools | Authentication & identity tools |
| Platforms | Web | Web |
| Became Popular | April 22, 2021 | August 2, 2024 |
| Website | go.clerk.com | stack-auth.com |
Who Should Pick Which?
Choose Clerk if...
- Easy integration
- Comprehensive solution
- Free tier
Choose Stack Auth if...
- No unique pros listed
With a FactScore™ of 94.3 vs 34.9, Clerk leads in community reception. Clerk uniquely offers Easy integration and Comprehensive solution, while Stack Auth stands out for No unique pros listed.
What Users Say
Clerk
We initially began building user management in-house but quickly realized that creating a secure and seamless user experience involved more complexity than anticipated. It was clear that continuing...
Clerk makes authentication effortless, with a developer-friendly API and prebuilt UI components that save time. Unlike Auth0 or Firebase Auth, Clerk provides first-class support for modern framewor...
We needed production-ready authentication without slowing the team down. Clerk let us ship securely from day one and stay focused on core product work. Setup was fast, UX is polished out of the box...
Stack Auth
I love Stack for being open source and making it super easy to add auth. Love the team and love the product!
Related Comparisons
Frequently Asked Questions
Which is better, Clerk or Stack Auth?
Based on FactScore™, Clerk leads with a score of 94.3 vs 34.9. Clerk has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Clerk compared to Stack Auth?
Clerk uniquely offers: Easy integration, Comprehensive solution, Free tier, Fast setup, Flexible auth.
What are the pros of Stack Auth compared to Clerk?
Stack Auth uniquely offers: No unique pros listed.
Is Clerk better rated than Stack Auth?
Clerk is rated 5.0★ from 76 reviews. Stack Auth is rated 5.0★ from 4 reviews.
What is the FactScore™ of Clerk and Stack Auth?
FactScore™ weighs rating and review volume together. Clerk scores 94.3 and Stack Auth scores 34.9.
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