Rex

Rex is an AI operations partner for order to cash in the enterprise. It deploys AI agents that work finance accounts across email, ERP, CRM, voice and chat, handling collections, dispute resolution, cash application and customer portal submissions, with finance operators overseeing the work. The platform builds a finance context layer for each account from history in the customer's ERP, CRM, inbox, portals and bank feeds. Company policies are encoded as operating procedures that agents follow, and approved exceptions refine those procedures over time. A Mission Control view shows what each agent is doing account by account with every action logged, and agents can be backtested against changes before production use. Customers get KPI tracking against agreed targets such as days sales outstanding and response times, plus an assistant that answers questions about any customer, invoice or dispute from the company's own data. Response and resolution times are agreed up front as service levels. Rex is aimed at large finance teams that want to collect cash faster and improve receivables performance without adding headcount. The vendor says implementation is typically live in under two weeks. Rex prices on outcomes rather than seats. Fees are tied to the work the agents complete and benchmarked against the cost of operating receivables rather than software licenses. No fixed price list is published, and buyers contact the team or book a demo. Rex is built by a team in London and San Francisco and is backed by Y Combinator.