Committing to Agent Identity: Clerk raises $50m Series C from Menlo and Anthropic’s Anthology Fund

We’re excited to share that Clerk has raised a $50 million Series C, led by Menlo and Anthropic’s Anthology Fund, alongside Georgian and previous investors.

Clerk started with a simple vision: offer best-practice authentication with spectacularly easy developer experience. Since then, we’ve become the user management solution of choice, and scaled to manage over 200 million users for over 15,000 applications.

A key reason developers choose Clerk is because authentication is always evolving, and Clerk helps them stay on the cutting edge. In our short history, we’ve already helped our customers navigate the introduction of both passkeys and crypto wallets on sign-in pages.

Today, everyone’s attention is on AI. It’s clear that “agents” need a new authentication solution: one that lets them act on behalf of humans with fine-grained permissions, and is easily auditable by both their operating human and application administrators.

The path to secure agent identity won’t come from Clerk alone, but we’re eager to help bring it to life. As the IETF works to extend OAuth with agent identity specifications, we’re laying the groundwork to adopt those standards as soon as they’re ready.

Once formalized, Clerk will bring support to our signature <SignUp /> and <SignIn /> components, and make agent identity available to our customers with just a few clicks.

Beyond agent identity, this capital will also be used for:

• Doubling down on developer experience: maintaining our emphasis on spectacular DX with deeper integrations, improved documentation, and expanded support for vibe coding and agentic workflows
• Expanding our product surface: improving our existing products for multi-tenancy and billing, and adding new products to support other business primitives
• Investing in reliability: making sure that the infrastructure powering your users is always there when you need it

Of course, this Series C would not have been possible without our customers, partners, and the incredible team at Clerk. We’re endlessly grateful for your support, and look forward to collaborating on this next chapter of both Clerk and authentication itself.