Numbers Game

Numbers Game turns Claude into a working assistant on client ledgers. Instead of exporting reports and pasting them into a chat, an accountant connects each client's Xero or QuickBooks Online file and asks Claude to reconcile, review, draft adjusting entries or build a board pack, with every change held for approval.

What it does well. It covers both ledgers UK practices use most, Xero and QuickBooks Online, and the scope is broad: reports, reconciliations, close checklists, classification and branded PDF deliverables. The audit-on-connection check for miscategorisations, missed depreciation and duplicates is a useful first look at a new client. The approval step before any write is the right control. Pricing is published and per connection with unlimited seats, and AI usage runs on the firm's own subscription, so there is no hidden usage bill. A 14-day trial is long enough to test on real clients.

Where it falls short. The cost per client is high for small books: 149 US dollars for three connections works out at about 50 dollars per client per month on Starter, falling with volume. The firm also needs paid Claude or ChatGPT seats on top. On security, the vendor is open about where it stands: it lists TLS 1.3 in transit, AES-256 at rest, scoped OAuth access, MFA and no training on client data, but holds no certification such as SOC 2 yet and its first independent penetration test is still in planning. Data is held in the EU by default, with US residency only on Enterprise, which US firms should note. Independent evidence is still limited: the public proof is two vendor case studies, a five-year QuickBooks Online clean-up for a California app developer completed in seven days, and PrismEdge, a fractional CFO practice whose operating expense audit across three entities fell from a few days to under two hours. For UK clients the vendor describes a VAT evidence workflow: bills are created from uploaded supplier invoices with the document attached and the VAT treatment proposed for review, and it says UK clients already use it. We found no VAT return filing or Making Tax Digital submission on its site, so firms still need separate software for that. Results depend on how well staff write prompts and review output, so training matters.

Best for. Small practices, solo accountants and fractional CFOs already using Claude who want to do reconciliation, review and reporting on Xero and QuickBooks Online clients from one place. It also connects to bank and credit card accounts and uses Claude to suggest categories from a client's historical coding and the transaction context, with the accountant making the final decision, so it suits practices that want help with coding but keep a person in control.

Verdict. A capable, well-controlled way to put Claude to work on client ledgers, with clear pricing and both major cloud ledgers covered, but it is a tool for staff comfortable with AI, not autopilot. Use the trial on three clients, and compare one month-end against your normal process.