Rex
AI agents run accounts receivable work such as collections, cash application and reconciliation for enterprise finance teams.
Company basics
- HQ
- United Kingdom
- Delivery model
- Managed (they run it for you)
- Pricing model
- Outcome-based
Scope
- Industries
- Workflow Automation
- Regions
- United Kingdom, United States
- Languages
- unstated
About Rex
Rex describes itself as an AI operations partner for order-to-cash. Its AI agents run accounts receivable workflows for enterprise finance teams, including collections, invoice portal uploads, cash application, payment reconciliation and AR inbox management.
According to the site, agents handle routine work such as customer follow-ups, portal submissions, reconciliation and inbox triage, while people keep control of exceptions, approvals and higher-risk decisions. Rex connects to existing systems rather than replacing them, and the site lists ERPs and CRMs such as Oracle NetSuite, SAP, Microsoft Dynamics and Salesforce, as well as Slack, Microsoft Teams and Google Drive, with no data migration required. The engagement is described as scoping, onboarding led by a finance expert, continuous agent execution and improvement cycles. The company states that implementation is typically live in under two weeks.
Rex states that it prices on outcomes rather than seats, with fees tied to the work its agents complete. The site states that customer data is never used to train models and that it is GDPR compliant with EU data residency.
Rex was founded by Merlin Kafka and Lewis Blackwood, and the team works from London and San Francisco.
What they do
- End-to-end delivery (you don't operate the tools)Source · checked 2026-09-29Positions itself as AI operations partner whose agents run AR workflows for finance teams.
- Human review includedSource · checked 2026-09-29Security page says system actions can be surfaced for review before execution.
- Works inside your existing systemsSource · checked 2026-09-29Connects to ERPs (NetSuite, SAP, Dynamics, Workday) plus email and collaboration tools.
Pricing
- Pricing model
- Outcome-based
- Published starting price
- Not published
- Pricing page
- View pricing
Evidence of outcomes
BOutcomes reported by the company or its investors.Self-reported metrics (response time, DSO improvement) and a named customer on the company homepage https://rex.inc; no independent confirmation seen.
A: third-party verifiable outcomes · B: outcomes reported by the company or its investors · C: no publicly verifiable outcomes yet. Demos, forecasts and slogans do not count.
FAQ
Does Rex replace an ERP or existing AR systems?
No. The site states Rex connects to existing systems such as ERPs, CRMs, email and Microsoft Teams, and that no data migration is required. (Source: https://www.rex.inc/)
How is Rex priced?
The company states it prices on outcomes, not seats, with fees tied to the work its agents complete and benchmarked against the cost of operating receivables. (Source: https://www.rex.inc/pricing)
How does a customer get started with Rex?
Customers contact the team or book a walkthrough, then scope a workspace with Rex. The company states implementation is typically live in under two weeks. (Source: https://www.rex.inc/pricing)
Is customer data used to train models?
The site states that customer data is never used to train models, and that Rex is GDPR compliant with EU data residency. (Source: https://rex.inc)
Our read
Editorial view based on public information — not an endorsement.
Capabilities
| Check | Status | Source |
|---|---|---|
| End-to-end delivery (you don't operate the tools) | Confirmed | Source · checked 2026-09-29Positions itself as AI operations partner whose agents run AR workflows for finance teams. |
| Human review included | Confirmed | Source · checked 2026-09-29Security page says system actions can be surfaced for review before execution. |
| Signed off by licensed professionals (CPA, attorney…) | Not stated | — |
| Works inside your existing systems | Confirmed | Source · checked 2026-09-29Connects to ERPs (NetSuite, SAP, Dynamics, Workday) plus email and collaboration tools. |
| Private / on-prem deployment available | Not stated | — |
| API or data export | Not stated | — |
| Multilingual delivery | Not stated | — |
Commitments
| Check | Status | Source |
|---|---|---|
| Public delivery SLA | Not stated | — |
| Outcome-based pricing | Confirmed | Source · checked 2026-09-29States it is priced around outcomes rather than seats. |
| Refund / satisfaction guarantee | Not stated | — |
| Customer data not used for training | Confirmed | Source · checked 2026-09-29States customer data is not used to train or fine-tune models. |
| SOC 2 | Not stated | — |
| ISO 27001 | Not stated | — |
| HIPAA | Not stated | — |
| GDPR | Confirmed | Source · checked 2026-09-29Privacy policy says a DPA is available for GDPR needs; homepage also lists GDPR compliance with EU data residency. |
| Named party responsible for outcomes | Not stated | — |
Funding
Y Combinator S26 batch; Vercel Ventures and angels from Stripe, Coinbase, McKinsey, Browserbase, Braintrust, Cursor (per company page); amount not statedAnnouncement
How we check
Every check below links to its source and shows when we checked it. "Not stated" means we found no public statement — it does not mean "no".
Other routes
Use a tool yourself
Get it implemented
Sources
- Company website: https://rex.inc/
- End-to-end delivery (you don't operate the tools): https://www.rex.inc/
- Human review included: https://www.rex.inc/ai-security
- GDPR: https://www.rex.inc/privacy-policy
- Pricing page: https://www.rex.inc/pricing
- Funding announcement: https://www.rex.inc/company
Change history
- 2026-09-29 · Listed on Toolsfine