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.
Products
The accountancy suite
One client relationship, one standard of evidence. Win them, run them, answer them, decode their post, tell their story.
Footnote
UK tax answers you can cite.
HMRC-cited tax answers from Athena, confidence-scored, or she refuses to guess.
Engage
Win the client in five minutes.
Companies House lookup to priced proposal to signed engagement letter to money collected. One flow, with AML onboarding built in.
AccountFlow
The practice-management hub.
Every client, every HMRC deadline, automated emails, time tracking and billing in one system, at a flat price that doesn't grow when you hire.
Narrative
Management accounts, with the story told.
Trial balance in, a branded management-accounts pack out, with compliance checks nobody else runs and Athena's commentary you approve.
Envelope
The brown envelope, decoded.
Upload the HMRC or Companies House letter that just landed. Envelope classifies it, computes the statutory deadlines with date rules (never the model), and drafts the reply for your review.
Footnote Property
Every Land Registry practice guide, on call.
Athena gives conveyancers cited answers in seconds, with confidence scores and file-ready PDF reports. The same evidence gate as Footnote, for property.
Beyond the desk
The same habits, pointed at different problems: trades in the field, decisions at midnight, phones that ring themselves, and iron.
Graft
Stay legal. Get every refund you're owed.
Graft tracks your miles, reads your receipts, builds CIS-correct invoices and files Making Tax Digital, so the tax already taken off your payments comes back to you. Your accountant lives in the app.
Boardroom
An advisory board for decisions that keep you up at night.
Ask The Boardroom puts a board of AI directors around your real decision: finance, marketing, operations and strategy chairs, each arguing their corner.
CallForge
AI calls that sound human.
Outbound calling with a voice you'd swear was a colleague: researched prospects, natural conversation, and a dashboard of every call.
The Forge
Training that trains back.
An AI spine for real programming across powerlifting, bodybuilding, hybrid events, functional fitness, marathons and S&C. Your plan adapts to the sessions you actually log.
The stack
One client, end to end
Most software firms sell you a point tool and wish you luck. Capstone follows the whole relationship.
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Win the work
Engage
A Companies House lookup becomes a priced proposal, an e-signed engagement letter, and money collected. Five minutes, start to signed.
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Run the practice
AccountFlow
Every client, every HMRC deadline, every email chase. One hub, one flat price that stays put when you hire.
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Answer anything
Footnote
The tax question that used to eat your afternoon gets an answer with HMRC citations and a confidence score. Or a refusal, which is its own kind of answer.
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Decode the post
Envelope
The brown envelope lands, Envelope reads it: letter type, the deadlines it triggers, and a drafted reply waiting for your review.
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Tell the story
Narrative
Trial balance in, a branded management-accounts pack out, with compliance checks nobody else runs and commentary you approve line by line.
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Reach the field
Graft
Your CIS subcontractor clients keep their tax position, mileage and receipts straight in their pocket, with you inside the app.
The evidence gate
Cited. Scored. Or refused.
Every AI answer is grounded in official guidance, cited and confidence-scored, or refused. That refusal is the feature. It is the difference between an AI that sounds right and one you can put in the client file.
And numbers never come from the model. Tax, deadlines and projections are computed by deterministic, tested code. Athena explains; she does not arithmetic her way into your accounts.
Question
Can my client reclaim VAT on a car used partly for business?
Athena
Generally no. Input tax on a car is blocked unless it is used exclusively for business purposes, with narrow exceptions for taxis, driving schools and self-drive hire.
Question
What will HMRC's MTD penalties look like in 2029?
How we sell
Anti-enterprise, on purpose
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
UK accounting and audit businesses, most of them small practices
Taxpayers entering MTD quarterly filing by April 2027
UK conveyancing firms, ignored by enterprise legal-tech
Free tools
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 toolFor conveyancers
The 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
An accountant with a barbell habit
Capstone is built by a practising accountant, which is why the suite obsesses over citations, deadlines and audit trails rather than dashboards nobody reads. The same founder holds a WDFPF world powerlifting title, which is where The Forge comes from. Different rooms, same rule: do the reps, show your working, let the results argue for you.
Practising UK accountant
WDFPF World Powerlifting Champion
Ship weekly, publish prices, refuse to guess
Shipping log
Recently out the door
- 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 you just want to argue about tax. Email lands with the founder, not a ticket queue.
sales@capstonesoftware.co.uk