platoseedplatoseed
AI Operations Partner for Enterprise Order to Cash
Rex is an AI-native service for order to cash. We replace people-heavy operations with AI agents that continuously manage invoices, customers and exceptions. Order to cash is a $60B outsourced function because the work is too messy for traditional automation. Every customer has different context, exceptions do not follow clean rules, and the next step is often buried in emails, portals, handoffs, or someone’s memory. Rex agents run continuously in the background and resolve work to SLA standards so cash keeps moving. We're live with pre-IPO tech companies, managing >$500m in receivables from F100 companies, cutting manual follow-up cycles from weeks to hours. We founded Rex after spending four years building Sequence, an a16z-backed finance ops platform, from zero to Series A — where we saw firsthand that at-scale, O2C still runs on manual labour. Rex is the #1 winner of the Vercel AI Accelerator out of 2,500 teams, selected by Guillermo Rauch and leaders from OpenAI, Anthropic, Browserbase and more.
Rex is the AI operations partner for enterprise order-to-cash, providing a continuously staffed AI-driven team of agents that cover every account, resolve exceptions, and keep cash flowing with enterprise SLAs and real-time visibility.
Rex connects to a company’s ERP, CRM, inboxes, and vendor portals to run the order-to-cash process continuously. It uses specialized agents to triage inboxes, perform portal uploads, and conduct payment follow-ups, operating across all accounts and touchpoints. The platform provides real-time visibility, exception detection, risk scoring, and recommended next steps, with escalation routing for non-routine decisions and a live activity feed with SLA status and open approvals.
Who it’s for: Global enterprises seeking AI-assisted, continuous order-to-cash operations with enterprise SLAs and real-time visibility.
mentions of enterprise SLAs, SOC 2 type II (pending), and a demo/schedule walkthrough indicate traction and ongoing enterprise engagement
Founder and CTO at Rex, building the AI partner for enterprise order to cash. Previously: - Founding engineer at Sequence (backed by a16z) - Cofounded Personably (backed by Global Founders Capital) - Early team at GoCardless (YC S11) - Economics at Cambridge
Merlin is the Founder and CEO of Rex, the AI partner for enterprise order-to-cash. He spent 4 years as CPO at Sequence (a16z-backed), an order-to-cash platform where he grew the company to millions in ARR and hundreds of customers. He has deep domain expertise in order to cash and accounts receivable workflows -- the exact space Rex is transforming with AI. Previously a PM at Tessian (Sequoia-backed, acquired in 2023). Studied Industrial Engineering in Cambridge and Product Design in Glasgow.
Autonomous Customer Operations
AI Workers for Field Services
