- WorkOS closes a $100 million Series C led by Meritech and Sapphire at a $2 billion valuation.
- OpenAI, Anthropic, xAI, Cursor, Perplexity, and Vercel all use WorkOS for enterprise authentication.
- The platform processes billions of API requests monthly with five nines of uptime.
- CEO Michael Grinich says the funding will accelerate security infrastructure for agentic software.
$100 Million to Own the Enterprise Identity Layer
WorkOS has closed a $100 million Series C at a $2 billion valuation. The round was led by Meritech and Sapphire, with participation from Audacious, Craft, Abstract, Greenoaks, and others. The company provides authentication, permissions, and compliance infrastructure that lets startups sell to enterprises from day one — SSO, SCIM, audit logs, encryption, all out of the box.
The customer list reads like a directory of the AI industry’s biggest names: OpenAI, Anthropic, xAI, Cursor, Perplexity, Vercel, Replit, Sierra, and Synthesia all run on WorkOS. For fast-growing AI companies, enterprise buyers expect security and compliance immediately. WorkOS makes that possible without months of custom engineering.
Agents Need Authentication Too
The fundraise is a bet on what comes next. As AI agents begin operating autonomously inside organizations, every action they take still needs to be authenticated, authorized, and auditable. WorkOS has expanded from its authentication roots into a broader platform covering granular permissions, abuse detection, feature flags, MCP support, and more — processing billions of API requests monthly at five nines of uptime.
The timing is sharp. The marginal cost of writing software is collapsing, new products are shipping in weeks instead of years, and every one of them needs enterprise-grade identity infrastructure. WorkOS is positioning itself as the default trust layer for the agentic era — whether the builder is vibe coding a weekend project or shipping to Fortune 500 buyers.
