Capstone Software, England
Software that shows its working.
Tools for UK accountants, their clients, and a few other obsessions. Every AI answer is cited from official guidance, confidence-scored, or refused. Every price is on the page. No demo calls, ever.
The software
Screens from Footnote, AccountFlow, Boardroom and Graft, and stills from the short films.
The accountancy suite
One client relationship, one standard of evidence. Win them, run them, answer them, decode their post, tell their story.
Footnote
Tax answers for UK accountants, with the source.
Ask a UK tax question. Footnote answers from HMRC, GOV.UK and legislation, links the source, and shows a confidence score. If the guidance does not cover it, it says so.
Engage
Proposals and signed letters for accountants.
For accountants and bookkeepers. Look a company up at Companies House, send a priced proposal, get the engagement letter signed, and collect the fee on Stripe. AML checks are in the same flow.
AccountFlow
Deadlines and chasing for accountancy practices.
For UK accountancy practices. Every client's VAT, payroll, CIS, P11D, confirmation statement and MTD deadlines sit in one place. Chasing emails wait until someone in the practice approves them, and the price stays flat when you hire.
Narrative
Management accounts for accountancy practices.
For UK accountancy practices. Put a trial balance in. Narrative builds a branded pack, runs the statutory checks, and writes commentary for the practice to approve before a client sees it.
Envelope
HMRC letters, read for accountancy firms.
For UK accountancy firms, in early access. Upload an HMRC or Companies House letter. Envelope names the letter type, works out the statutory deadline with date rules, and drafts a reply for the firm to review.
Footnote Property
Practice guide answers for conveyancers.
For UK conveyancers. Ask a conveyancing question. Answers come from Land Registry practice guides and GOV.UK, with the source, a confidence score, and a PDF for the file. If the guidance does not cover it, it says so. Email the team for access.
Beyond the desk
Graft is for trades on CIS. Boardroom is for a decision in a small company. Hold The Fort answers when you can't pick up. Ring 01327 228522 to try it.
Graft
Mileage, receipts and CIS invoices for trades.
For UK trades on CIS. Graft records miles and receipts, builds CIS invoices, and files Making Tax Digital, so you can see the tax already taken and what you can claim back. Your accountant sees the same figures.
Boardroom
A board for people running a small company.
For owner-managers. Put a real decision to finance, marketing, operations and strategy. Each one argues its own side, then the chair recommends.
Hold The Fort
Answers your calls, says it's an AI, and texts you.
When you can't pick up, Hold The Fort answers the call, tells the caller it's an AI, takes a message, and texts the owner's mobile.
Students and sellers
C.A.T. is Q2022 practice for AAT Levels 2, 3 and 4. Am I Reported is a free check for people who sold on Vinted, eBay, Etsy or Depop.
C.A.T.
The free check names the topic that's costing you marks.
For AAT students on Levels 2, 3 and 4. A ten-minute check, with no account, names the topic that's costing you marks. Practice then shows which figure was wrong, and written answers are marked point by point.
Am I Reported?
Were you reported, and do you owe tax?
For people who sold on Vinted, eBay, Etsy or Depop. Answer a few questions. It says whether the platform would normally have reported you to HMRC, and whether tax would normally be due.
One client, end to end
Capstone follows the whole client relationship, from the proposal through to the management accounts.
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Win the work
Engage
Look the company up at Companies House, send a priced proposal, get the engagement letter signed, and collect the fee on Stripe.
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Run the practice
AccountFlow
Every client and every HMRC deadline in one place. Chasing emails wait until someone in the practice approves them, and the price stays flat when you hire.
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Answer anything
Footnote
A tax question gets an answer from HMRC guidance, with the source and a confidence score. If the guidance does not cover it, Footnote says so.
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Decode the post
Envelope
Upload the HMRC or Companies House letter. Envelope names the type, works out the deadline from date rules, and drafts a reply for the firm to review.
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Tell the story
Narrative
A trial balance goes in. A branded management accounts pack comes out, with the statutory checks and commentary the practice approves.
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Reach the field
Graft
CIS clients keep miles, receipts and their tax position on the phone, and their accountant can see the same figures.
Answers you can put in the file
Every AI answer is grounded in official guidance, cited and confidence-scored, or refused. When the guidance does not cover the question, Athena refuses and says why.
Tax, deadlines and projections are computed by deterministic, tested code. Athena writes the explanation.
How we sell
- Published pricing. No demo call to see the price
- Free, product-shaped trials
- Monthly. Cancel anytime, no five-year lock-in
- On your side. We never open a firm that competes with our customers
There are about 29,600 UK accounting and audit businesses, most of them small practices. Around 1.75 million taxpayers are due to enter MTD quarterly filing by April 2027. About 5,904 UK conveyancing firms are left out of enterprise legal-tech.
Useful before you spend a penny
MTD Repricing Calculator
See the revenue you're losing to unpriced MTD quarterly work.
Open the toolPer-Seat Tax Calculator
See what per-user practice software costs you over 3 years vs flat pricing.
Open the toolProposal-to-Cash Checklist
The 14-point checklist for getting from proposal to money in the bank.
Open the toolThe same evidence gate, for property law
Footnote Property answers conveyancing questions from Land Registry practice guides and GOV.UK, cited and confidence-scored. Around 5,904 UK conveyancing firms get ignored by enterprise legal-tech. We built for them instead.
Who builds this
The team
Capstone Software Ltd is an independent English company. The team builds the accountancy suite around citations, deadlines and audit trails.
Capstone Software Ltd
England and Wales, company no. 17074228
Ship weekly, publish prices, refuse to guess
Recently out the door
- 2026-08-22 C.A.T. and Am I Reported listed on the company site
- 2026-07-25 Graft accountant portal live at app.graft.capstonesoftware.co.uk
- 2026-07-22 Graft lands on the iOS App Store
- 2026-07-12 Narrative launches: management accounts with the story told
- 2026-07-10 Footnote on sale. Cited tax answers, or a refusal
Talk to a person
Questions, larger firms, partnerships, or a point of tax you want to talk through. Email lands with William Massey.
sales@capstonesoftware.co.uk