---
title: "Frequently asked questions | Rex"
description: "Answers about Rex, the AI operations partner for order-to-cash."
canonical: https://www.rex.inc/faq
last-updated: 2026-08-21
---

# Frequently asked questions | Rex

Answers about Rex, the AI operations partner for order-to-cash.

### What is Rex?

Rex is an AI operations partner for order-to-cash. Rex agents run accounts receivable workflows for enterprise finance teams, including collections, invoice portal uploads, cash application, payment reconciliation, and AR inbox management.

Rex connects to the systems you already use, including your ERP, CRM, email, and Microsoft Teams.

### Who is Rex for?

Rex is built for enterprise finance and accounts receivable teams with resource-intensive order-to-cash operations. That typically means large customer bases, multiple systems, high transaction volumes, and manual work across collections, cash application, billing, disputes, and customer portals.

### How is Rex different from accounts receivable software?

Most accounts receivable software helps teams organize, prioritize, or automate parts of the AR process. Rex is designed to do the underlying work.

Rex agents can follow up with customers, upload invoices to supplier portals, reconcile payments, process remittances, update systems, and handle routine requests. Your team stays in control of exceptions, approvals, and higher-risk decisions.

### Does Rex replace my ERP or existing AR systems?

No. Rex works with your existing finance stack rather than replacing it.

Rex connects to ERP, CRM, email, collaboration tools, customer portals, and existing AR systems, then operates workflows across them. There is no ERP migration or rip-and-replace project.

### How long does Rex take to implement?

Most teams can go live with Rex in under two weeks.

Rex connects to your existing systems and learns the procedures your team already follows. There is no data migration or lengthy software implementation required.

### How is Rex priced?

Rex is priced around outcomes, not seats.

Pricing reflects the scope and volume of finance operations Rex takes on, and is benchmarked against the cost of running those processes with internal teams, shared service centers, or BPO providers rather than traditional software licenses.

### What ROI can I expect from Rex?

Rex improves accounts receivable performance in two ways: it reduces the manual work required to run AR and helps invoices turn into cash faster.

Customers typically see DSO improve by around 12 days and save more than 20 hours of manual work per AR operator each week. Results can begin within weeks of deployment.

### How does Rex handle complex accounts receivable scenarios?

Rex follows your procedures, policies, approval rules, and authority limits. Every action is recorded with a full audit trail.

When a case requires human judgment or falls outside its authority, Rex escalates it to the right person with the relevant customer, invoice, payment, and communication context already assembled.

See also [contact](https://www.rex.inc/contact) and [learn more](https://www.rex.inc/learn-more).