Here's the counterintuitive part: the best-known name in cash application no longer exists, and people still search for it every month. If you shortlisted cash application software any time in the last decade, you met Rimilia, the specialist that matched incoming customer payments to open invoices with AI years before that was a normal claim. Then BlackLine bought it, folded it into an enterprise suite, and the brand quietly disappeared. The search traffic didn't. Plenty of the people still typing the name run their business on Xero or QuickBooks Online, not SAP, and they're the ones the acquisition quietly stranded.
What Rimilia was, and why AR teams rated it
Rimilia was a UK-built software company that did one job unusually well: cash application. Its platform read incoming payments and remittance data, used machine learning to work out which invoices each payment covered, and applied the cash automatically, flagging only the exceptions for a person. For accounts receivable teams drowning in unapplied cash, it was the first credible proof that the matching step, the genuinely expensive part of AR, could be handed to software.
It mattered because cash application had always been the unglamorous bottleneck. Collections gets the attention, but a payment that's arrived and not been applied is arguably worse than one that hasn't arrived: your bank balance looks healthy while your ledger chases customers for money they already sent. Rimilia built a business on closing that gap, and it built it for large organizations: corporates with dedicated AR departments, bank keying services delivering payment files, and ERP systems as the ledger of record.
The BlackLine acquisition, and the move upstream
In October 2020, BlackLine acquired Rimilia for about $150 million ($120 million at close, with up to $30 million more in earnouts). The logic was clean: BlackLine dominates financial close automation for enterprises, Rimilia extended that into accounts receivable, and the two sell to the same buyer, the office of the controller at a large company.
What used to be Rimilia now lives on as BlackLine Cash Application, one module inside BlackLine's invoice-to-cash suite alongside collections, credit, and dispute management. The technology didn't get worse. It got repackaged for an even more enterprise motion: sold as part of a platform, implemented as a program, and aimed at global businesses consolidating payment data across regions, banks, and multiple ERPs.
None of this is a criticism. For a global enterprise on SAP or Oracle, BlackLine's suite is a sensible shortlist, as are HighRadius and Billtrust. The point is what the acquisition did to the market below that line: the one dedicated cash application specialist got absorbed upstream, and nothing in that world moved downstream to replace it.
The gap the acquisition left
Here's the awkward truth the enterprise consolidation skated past. Cash application scales with remittance complexity, not company size, and complexity lands on small firms too. A wholesaler with eight people gets the same hundred-line supermarket remittance as a listed company. An NDIS provider gets bulk government remittances with more line items than most corporates ever see. The pain has never respected headcount.
But the tooling consolidated above the ERP line. Every serious cash application product assumed bank payment files arriving from a remittance processing service, an ERP as the system of record, six-figure implementations, and an AR operations team to feed the engine. Below that line, teams running cloud ledgers were left with exactly three options: match by hand, build brittle spreadsheet macros, or throw offshore headcount at it. We've written before about when the offshore AR maths stops working, and the short version is that it stops scaling right around the volume where the problem starts to hurt.
The search data shows the split. Some of the people typing the name are enterprise buyers who end up at BlackLine, which is where they belong. Plenty aren't: they're finance managers and bookkeepers who heard the name, have the exact problem it solved, and never had an ERP for the enterprise suites to plug into. The name outlived the product because the need did.
Cash application when your ledger is Xero or QuickBooks Online
What actually divides this market is the ledger, not the company's size. We work with two-person bookkeeping operations and with multi-entity groups reconciling remittances across eight Xero organizations, and they have more in common with each other than either has with an SAP shop. No bank keying service in the middle: remittances arrive straight from customers as PDFs, spreadsheets, and email bodies. No middleware: the cloud ledger is the system of record. No AR operations department: the person doing the matching has four other jobs.
For that world, the requirements list looks different from an enterprise RFP:
- Native ledger connection. The tool has to read your open invoices from Xero or QuickBooks Online directly and post the payment back applied across every invoice it covers, so the bank feed still reconciles cleanly. No integration project, no file exports.
- Remittance-driven matching. The remittance advice is the source of truth, in whatever shape it arrives. That means reading any layout without templates, because your customers will never standardize their formats for you.
- Exception-only review. The clean lines, 99 percent of a standard remittance, should apply without a human touch, and the deductions, short-pays, and mystery references should surface as a short worklist, not hide inside a hundred matched lines.
- Priced like SaaS, live in days. If the implementation is measured in months, the economics only work above the ERP line. Below it, connecting your ledger should take minutes and the first matched remittance should happen on day one.
We wrote a fuller definition of the discipline for smaller teams, including the unapplied-cash and DSO metrics worth tracking, in cash application for a small Xero AR team.
Where RemitClear fits
RemitClear is a deliberate answer to that gap: the cash application specialist for the cloud-ledger world. It reads every remittance advice, PDF, Word, Excel, CSV, or plain email text, matches each line against your open invoices, and posts the payment straight into Xero or QuickBooks Online with the original document kept for audit. It's honest about being narrower than an enterprise suite: no collections module, no credit management, no dispute workflow. The narrowness is the point. It's the matching layer without an implementation program bolted around it, rated 5.0 on the Xero App Store, certified by Xero, and running in production for teams from single-ledger businesses to multi-entity groups.
The category overview lives on our cash application automation page, including how the same engine behaves on each ledger.
Summary
This stops being your problem the moment you quit shopping in the enterprise aisle. If your ledger is SAP or Oracle, BlackLine and HighRadius are the right shortlist and always were. If it's Xero or QuickBooks Online, the capability Rimilia made its name on now runs natively on your own stack, priced and shaped for it. The name you searched for is retired; the job it did is not, and on a cloud ledger you can finally stop doing that job by hand.