The problem
Developers waste weeks building secure login, user accounts and org permissions instead of shipping their product
What they do
Drop-in sign-in, user management, multi-tenancy and billing for web and mobile apps
Traction 200M+ users across 15,000+ apps (Oct 2025); #4 fastest-growing vendor by new customers on Ramp (Dec 2025)
Hiring trend
- Open roles
- 2
- Headcount
- ~210-310
Flat: ~311 staff, -0.4% YoY (Revelio, Mar 2026); careers page 8 → 4 → 1 → 3 roles Oct 2025 → Oct 2026
Hiring in
- in San Francisco
- Remote
Latest news
Oct 2026
Launched MCP server that lets AI agents manage Clerk apps, after accountless CLI setup ↗Funding
- Last round
- $50M
- Stage
- Series C
- Date
- Oct 2025
Led by Menlo Ventures, Anthropic's Anthology Fund
- Hiring+0.52 open roles on the live job board (1–2 roles = +0.5)
- Funding recency+1Series C · $50M, Oct 2025 (12 months ago): 6–12 months = +1
- Traction0No growth signal counted: 200M+ users across 15,000+ apps (Oct 2025); #4 fastest-growing vendor by new customers on Ramp (Dec 2025)
- Red flags0Watch-outs noted below, none scored as a significant flag
- Total1.50.5 + 1 + 0 − 0 = 1.5 → Steady (1.5–3.49)
Distance (Half) is a separate read on how long the lead can last. It doesn't change the score.
Distance
Half · edge: hard to leave
Default auth for React/Next.js and AI-native startups (200M+ users, 15,000+ apps, top-4 on Ramp's growth list) and hard to rip out once user data lives there, but Auth0/Okta is far bigger, WorkOS, Stytch and open-source Better Auth compete, and 2026 outages and CVEs pushed some customers away.
Sources: Clerk: $50M Series C, 200M users across 15,000 apps (Oct 2025) ↗ · Clerk: #4 fastest-growing software vendor on Ramp, Dec 2025 ↗ · DEV Community: Clerk vs Better Auth migration math (Aug 2026) ↗
Watch-outs
Reliability and security crisis in 2026: repeated outages (Feb 10, Feb 19, Mar 10) took customer logins down, Clerk shifted most engineering to reliability, and some customers (Val Town) left; two serious auth-bypass CVEs (9.1 critical Apr 2026, 8.1 high May 2026). Minor, not scored: job postings cooled from 8 to 1-3 and headcount is flat.
Sources: Clerk: Postmortem of Mar 10, 2026 outage ('frustration is rightfully mounting', engineering shifted to reliability) ↗ · Clerk on X: 'we have not lived up to that responsibility' (Mar 2026) ↗ · DEV Community: Clerk vs Better Auth, Val Town left after outages (Aug 2026) ↗ · OpenCVE: Clerk CVE-2026-41248 (9.1 critical) and CVE-2026-42349 (8.1 high) ↗ · Clerk: Middleware route protection bypass advisory (Apr 2026) ↗ · Revelio Labs: Clerk headcount 311, -0.4% YoY (Mar 2026) ↗
Open ops roles
No ops roles open right now
Last checked Oct 25, 2026