Stuut’s $52.5M Series B Shows Microsoft Betting the Agent Economy’s Revenue Layer Is Already Here

For the past year, the conversation around AI in the enterprise has been dominated by the idea of the co-pilot — a digital assistant helping humans work faster. But a new $52.5 million Series B round for Stuut, announced October 7, 2026, suggests we are moving into a different phase. This isn't about helping people work faster. It's about agents doing the work themselves. Stuut builds AI agents that handle the entire order-to-cash lifecycle — order management, credit, collections, cash application, payments, disputes, deductions. Not a co-pilot that organizes work for humans. An autonomous system that executes it. The company reports that 81.