Clerk
Clerk is user management and authentication (category: Authentication). VibeToolRank agent test score: 8.1/10 (tested 2026-10-16, 3 runs, cloud free plan), #2 of 2 tested Authentication tools. Pricing: Pro $25/mo ($20/mo annual), 50K MRU/app incl., then $0.02/MRU; Business $300/mo ($250 annual). Free tier: Yes (Hobby): 50,000 monthly retained users/app.
Last updated:
Pricing and free tier
Pricing
Pro $25/mo ($20/mo annual), 50K MRU/app incl., then $0.02/MRU; Business $300/mo ($250 annual)
Free tier
Yes (Hobby): 50,000 monthly retained users/app
Last checked
2026-10-16
Pricing: verified-official source · verified 2026-10-16 (full-page-read)
Agent test verdict
Edition tested Clerk Cloud, Hobby free plan (development instance). Results may differ for the hosted product.
Tested 2026-10-16 · 3 runs · rubric v0.1 (provisional thresholds). 3/3 runs: sign-up (Backend API createUser), password sign-in plus new-device email code, active session check, wrong password rejected (422); ~3.3s per run. Self-serve Frontend API sign-up stalled at missing_requirements without a browser.
| Dimension | Score /10 |
|---|---|
| Outcome (40%) | 7 |
| Speed (15%) | 10 |
| Cost (15%) | 9 |
| Developer experience (15%) | 6 |
| Reliability (15%) | 10 |
| Overall | 8.1 |
Related
Comparisons
Other Authentication
- Better Auth — 8.2/10
Best Authentication · Best free Authentication · How we test