Rex

Rex is an AI-native operations platform that automates order-to-cash (O2C) workflows for mid-to-large enterprises. It ingests data from ERPs, CRMs, inboxes, and supplier portals to create a live model of your receivables process, then dispatches supervised AI agents to handle tasks like invoice follow-ups, payment reconciliation, portal uploads, and dispute triage. Finance teams at companies like Synthesia use Rex to reduce DSO, cut manual AR work, and get real-time visibility across thousands of customers and invoices. The platform maps your actual operational workflow—not an idealised version—showing exactly where cash gets delayed. Supervised agents execute routine work autonomously (e.g., emailing customers, checking PO status on Ariba, applying cash) while escalating exceptions, VIP accounts, and policy deviations to humans with full context and a recommended next step. Rex is designed to be live in one week with no data migration, learning from historical emails, contracts, and ERP data during onboarding. What sets Rex apart is its combination of process discovery, autonomous execution, and auditable agent activity. Every action is logged in a time-stamped feed, so finance leaders can see exactly what was done, when, and by which agent. The platform also provides proactive risk monitoring (e.g., detecting payment cadence drift, flagging accounts nearing 60+ days) and supports natural-language queries like 'Who broke a payment promise this month?' or 'Summarize this week in AR.' Rex is backed by Y Combinator (S26), won the Vercel AI Accelerator, and is part of the Deloitte & NVIDIA Adopt 100 program. It is particularly suited for mid-to-large enterprises, though pricing requires a sales conversation. Unlike traditional outsourcing or consulting, Rex offers continuous coverage with outcome-based pricing.