Clerk
Drop-in auth with prebuilt UI components — sign in, MFA, organizations, user management. Used by Vercel, Linear, and Browser Company.
- Location
- San Francisco, United States
- Raised
- $30M+
- Stage
- Series A
- Founded
- 2019
- Category
- Dev Tools
- Funding
- VC-backed
- Team
- 11-50
Funding figures as of Jul 2025 · not independently verified
Founders of Clerk
- Colin Sidoti
- Braden Sidoti
- Sukh Singh
Investors backing Clerk
- Madrona
- Stripe
Frequently asked questions
What does Clerk do?
Drop-in auth with prebuilt UI components — sign in, MFA, organizations, user management. Used by Vercel, Linear, and Browser Company.
Where is Clerk based?
Clerk is based in San Francisco, United States.
When was Clerk founded?
Clerk was founded in 2019.
How much has Clerk raised?
Clerk has raised $30M+ in their Series A round as of Jul 2025.
Who founded Clerk?
Clerk was founded by Colin Sidoti, Braden Sidoti, Sukh Singh.
Who has invested in Clerk?
Clerk is backed by Madrona, Stripe.
How Clerk would pitch themselves
○ Auto-generated01Target customer
Modern apps — the core audience Clerk's product is built around.
02Problem they solve
Drop-in auth with prebuilt UI components — sign in, MFA, organizations, user management. Used by Vercel, Linear, and Browser Company. The category has historically been served by tools that miss the modern workflow this product is built around.
03Key differentiator
Clerk differentiates on authentication and user management for modern apps. Backed by Madrona + Stripe, $30M+ raised — the company has resources + validation to compound this thesis. Founded by Colin Sidoti + team.
04Go-to-market strategy
Series-A scaling stage — building outbound sales motion, hiring first AEs, layering on customer success. Mix of PLG (where the product allows) + direct sales for higher-ACV deals.