Clerk.com
Clerk provides authentication tools for developers, offering embeddable UI components and APIs for user management. The company has raised $134M, including a Series C in October 2025, and employs 204 people.
The growth story
Clerk.com grew from 17 to 204 employees between 2021 and 2026, raising $134M along the way, most recently a Series C in October 2025.
About
Clerk sells developer tools for adding login systems and user management to applications. Its products include pre-built UI components and APIs that handle authentication flows, aimed at engineering teams building web and mobile apps.
The company has raised $134M from investors including Andreessen Horowitz and Georgian. Its Series C round closed in October 2025, though headcount growth figures are unavailable.
Founders and leadership
Engineering makes up nearly a quarter of Clerk's workforce with 49 employees. The company has a median tenure of 2 years across its 204-person team.
The Clerk.com org chart
Braden Sidoti (CTO, Co-founder) leads 20 mapped leaders with 13 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Engineering 53 (+2% YoY), Customer Success and Support 38 (+23% YoY), Administrative 26 (+13% YoY), Operations 8 (0% YoY), Legal 8 (+33% YoY), Business Development 7 (+17% YoY).
Talent flow
Clerk recruits heavily from infrastructure software companies, with 8 hires from HashiCorp and 7 from Vercel. Alumni most frequently move to Vercel (4) and newer startups like Ask Feather and Mastra.
Most common previous employers of Clerk.com staff: HashiCorp (8), Vercel (7), CARROT (5), Stream (3), Shopify (3), Auth0 (3). Former Clerk.com employees most often moved to Vercel (4), Ask Feather (2), Mastra (2), Powell (1), Quill (1), Browserbase (1).
Alumni worth knowing
The Clerk.com mafia
Four alumni-founded companies have emerged from Clerk, including Unkey (12 employees) and Quill (4 employees). These startups focus on developer tools and authentication infrastructure.
4James Perkins, was Developer Success until 2023Rishi Raman, was Head of Growth & GTM until 2023Drew Wilson, was Head of Design until 2025Colin McDonnell, was OSS Fellow until 2025Web traffic
Traffic mix: 65% direct, 23% search, 5% social, 1% paid.
What this company is made of
Most common skills at Clerk.com: JavaScript (52), React.js (42), Cascading Style Sheets (CSS) (36), SQL (35), Python (Programming Language) (35), Git (33), Node.js (32), HTML (28).
Where the team actually sits
Clerk.com people are concentrated in United States (6), Colorado, United States (5), Greece (5), California, United States (5).
Search footprint
Clerk.com attracts about 7,782 organic search visits a month, traffic worth roughly $22K a month if bought through ads. It gained 685 ranking keywords and lost 489 in the last period.
What employees say
- Compensation
- 3.50 / 5
- Career opportunities
- 4.10 / 5
- Senior management
- 3.60 / 5
- Work-life balance
- 4.50 / 5
Frequently asked
Clerk.com has 204 employees as of September 2026.
Clerk.com has raised $134M in total, most recently a Series C round in October 2025.
Clerk.com was founded in 2019 by Braden Sidoti.
Braden Sidoti (CTO, Co-founder) sits at the top of Clerk.com's reporting structure, with 13 direct reports.
The most common previous employers of current Clerk.com staff are HashiCorp (8 people), Vercel (7 people), CARROT (5 people).
Former Clerk.com employees most often move to Vercel (4), Ask Feather (2), Mastra (2).
At least 4 companies have a founder who previously worked at Clerk.com, including Unkey, Quill, Opacity.
Clerk.com attracts about 7,782 organic search visits a month, worth roughly $22K a month in equivalent ad spend.
The most common skills among Clerk.com staff are JavaScript, React.js, Cascading Style Sheets (CSS), SQL, Python (Programming Language).
Clerk.com staff are concentrated in United States (6), Colorado, United States (5), Greece (5).
Clerk.com has about 53 people in Engineering, up 2% over the past year, as of September 2026.
Clerk.com has about 38 people in Customer Success and Support, up 23% over the past year, as of September 2026.
Computed from 81 current and 92 former Clerk.com profiles, as of September 2026. Source: Crustdata.
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