Manifest OS Closes $60M Series A at $750M Valuation to Build AI-Native Law Firms With Fixed Fees

Manifest OS, building an AI-native law firm operating system starting in business immigration, closed a $60 million Series A at a $750 million valuation backed by Menlo Ventures and Kleiner Perkins — the single largest Series A ever recorded in legal technology. The company's model treats fixed-fee pricing and AI-native delivery as inseparable: the platform handles every non-courtroom function of a law firm, and the business model prices by outcome rather than the hour. Immigration is a high-volume, process-intensive practice area well-suited to productization, making Manifest OS's beachhead credible as proof of concept before expansion. At a $750 million valuation, the market is pricing in the possibility that this model replicates across practice areas — and that the firm enabling it captures platform economics rather than service margins.