Overview
Rex is an AI operations partner for enterprise order-to-cash. Its agents carry out collections, dispute and cash-application workflows with oversight from finance operators.
What Rex does
Rex works across the systems and communication channels used to collect customer payments. Its agents can follow up accounts, handle disputes, work customer portals and update the ERP or CRM as the process progresses.
The deployment combines the customer’s procedures with expert finance operators who oversee the agents. Account-level activity is visible as work happens, with a record of actions and operational measures such as response times and resolution rates.
The model is intended for finance teams that want an operating partner rather than another application requiring the same manual work. Rex takes on repeatable execution while the team can retain control over the business rules and matters needing escalation.
Differentiation
Compared with a collections dashboard
Rex’s agents act on accounts and update the surrounding systems, rather than only prioritizing a list for a person to work.
Compared with staffing an O2C team
Its model combines automated execution with finance-operator oversight, providing a configured operation instead of headcount alone.
Track record
Rex publishes a named Synthesia customer story describing the use of agents across the company’s order-to-cash operation.
Company details
- Founded
- 2026
- Team size
- 2 (YC listing)
Founders & leadership
Investors & backers
Y Combinator







