WorkOS Raises $100M Series C at a $2B Valuation to Expand Enterprise Identity and Permissions APIs
When software wants to sell to the enterprise, it does not need another motivational poster. It needs a passport. WorkOS just raised a $100M Series C and stamped that passport in gold ink, landing at a $2B valuation. The round was led by Meritech Capital and Sapphire Ventures, with Audacious Ventures, Craft Ventures, Abstract, Greenoaks, and others joining the table. That is not a cap table, that is a vote of confidence from people who read balance sheets the way most folks read bedtime stories.
Congratulations to Michael Grinich, Founder and CEO of WorkOS, for building the quiet infrastructure that makes loud growth possible. And respect to the technical leadership driving 99.999% uptime across thousands of customers and billions of API requests each month. Reliability at that scale is not a feature. It is a promise kept under pressure.
WorkOS sits in San Francisco, founded in 2019, but its real headquarters is inside the codebases of modern SaaS. The company delivers APIs and SDKs for User Management, Single Sign-On, Directory Sync, and Audit Logs, the enterprise essentials that turn a scrappy product into something procurement will actually sign. SAML, OIDC, SCIM, permissions, logging. The alphabet soup that decides whether your deal closes or quietly dies in legal.
And here is where the timing gets interesting. We are in what Michael Grinich calls a golden era for builders. AI companies are shipping at warp speed. More code is written in a month than some industries produced in a decade. But every action, human or agent, still has to be authenticated, authorized, and auditable. Intelligence without identity is chaos in a hoodie. WorkOS understood that early.
The platform has expanded beyond authentication into granular permissions, integrations, encryption, abuse detection, feature flags, and support for Model Context Protocol. Translation: if software is going to act on behalf of users or agents inside serious organizations, WorkOS wants to be the layer that keeps it honest. Secure by default. Enterprise ready without a year of custom engineering.
Look at the customer list Michael Grinich shared: OpenAI, Anthropic, xAI, Cursor, Perplexity, Sierra, Baseten, fal, Replit, Vercel, Synthesia, Temporal Technologies, Gamma, Clay, Exa, Parallel Web Systems, Serval. That is not random logo collecting. That is a cross section of the companies defining the AI cycle. When the fastest builders choose your infrastructure, the market is telling you something.
For founders watching this round, the lesson is not just raise big. It is solve the unsexy problem that everyone else postpones. Make compliance, identity, and permissions so seamless that product teams can focus on magic while you handle the mechanics. In a world obsessed with front-end flash, WorkOS built the backstage rigging that keeps the show from collapsing mid-performance, and investors just doubled down on that thesis.