Clerk Raises $6.2M in Seed Funding


Clerk, a San Francisco, CA-based provider of drop-in authentication and user management solution, raised $6.2M in Seed funding.

The round was led by Andreessen Horowitz, with participation from S28 Capital, Fathom Capital, and South Park Commons.

The company intends to use the funds to expand its suite of authentication and user management tools, and create new tools to help B2B SaaS companies manage both user accounts and business accounts.

Founded by Colin Sidoti (CEO) and Braden Sidoti, Clerk offers drop-in authentication and user management solutions for React developers. The company empowers React developers to build sign-up and sign-in flows as well as user profiles without the assistance of backend developers. The solution comes complete with security essentials like multi-factor authentication and active device management. The React components can be customized to match any company’s branding.

While Clerk is intended for React frontends, the authentication solution works with any framework, programming language, or API gateway on the backend.

Notable startups using Clerk include database company Grafbase, women’s shapewear company Honeylove, and apartment rental company Blueground.