Capstone builds AI products for the professionals big vendors ignore. Every answer is grounded in official guidance, cited and confidence-scored — or refused. Transparent monthly pricing. Free trials. No five-year contracts, no demo-call gauntlet.
Built in the UK · For UK rules · By people who live the work
A practice management hub, a proposal engine that wins the work, and cited-answer intelligence tools — for the accountants and conveyancers big vendors ignore.
For UK accountants
UK tax answers you can cite. Grounded in HMRC and GOV.UK guidance, verified against allowed domains — or it tells you it doesn't know.
For accountants & bookkeepers
Win the client in five minutes. Proposals and engagement letters with a margin-protecting pricing engine — and MTD ITSA automation built in.
For UK accountancy practices
The practice management hub. Every client, every HMRC deadline, automated emails, time tracking and billing in one system.
For UK conveyancers
Every Land Registry practice guide, on call. Cited answers in seconds, with confidence scores and file-ready PDF reports.
The one objection that kills AI for regulated professionals is hallucination. So we engineered it out. Every Clarity answer passes four gates before it reaches you — and if it can't, it refuses instead of inventing.
Your question searches a corpus built only from official sources — HMRC, GOV.UK, Land Registry Practice Guides.
The answer is drafted strictly from what was retrieved — never from the model's general memory of the internet.
Every citation is checked against a whitelist of official domains. A source that doesn't verify doesn't ship.
Each answer carries a confidence score. Below the threshold, you get an honest "not enough evidence" instead of a guess.
Incumbents sell trust at thousands per year with multi-year lock-ins. Free AI sells speed with zero trust. We built the missing option: trustworthy, affordable and instant.
Every incumbent in every category we compete in hides pricing behind sales calls and multi-year contracts. We do the opposite — on principle, everywhere.
Every Capstone product starts with a free trial you can begin right now — no card, no call, no contract.