Meet Finn
Hi, I’m Finn.Always on. Always have your back.
Your AI accountant. Most AI tools answer questions. I answer them, then take the action: filing, posting, invoicing, chasing. Every write needs your approval first.
Free for 14 days. No credit card. Your first conversation takes 30 seconds.
Answers, then action
Finn doesn’t just talk.Finn does.
Say it in plain English. Finn does the work and shows you what changed. Nothing is written to your books without your confirmation.
Categorise last week's transactions
Posts 47 transactions to GL codes. Flags 2 for review. Done in 6 seconds.
Pay Sarah's £340 expense claim
Confirms with you, books it to Salaries, marks it reimbursed, logs the audit trail.
What's my VAT this quarter?
Pulls the 9-box, flags 3 reverse-charge entries, drafts the return for your approval.
Chase Acme Ltd for last month's invoice
Drafts the email, shows it to you, sends it once you confirm.
Just spoke to Acme, they want a Q3 retainer for £15k
Creates the deal, logs the call, moves the stage to Pitched, reminds you in 5 days if there's no follow-up.
Every write action asks first. Every change is logged, reversible, and shows its source.
A screenshot of Finn in AccountsOS. The user asks Finn to pay Sarah’s £340 expense claim. Finn finds expense claim EC-1184, then shows an approval card listing the amount, the category, the account it will be paid from and the VAT treatment, with Approve and Edit buttons. Finn cites the expense claim and the attached receipt as its source.
Write-confirm
Finn asks beforetouching your books.
Every create, update and delete arrives as a card you approve. Finn shows the amount, the category, the account it’s coming from and the document it read.
- Nothing posts silently, ever
- Every fact cites the document it came from
- Low confidence means Finn asks, not guesses
- Full audit trail, every action reversible
Wherever you are
Six ways to reach the same accountant.
Same Finn, same books, same memory of your last conversation, whichever one you pick.
Voice
Talk to Finn while you're driving. Hands-free, no app to open.
Photograph a receipt at dinner. Finn extracts, categorises and posts it.
Slack
DM Finn from your workspace. Approvals, queries and reports in-channel.
Telegram
Forward receipts, ask about your books, send voice messages.
Forward anything to finn@accounts-os.com: receipts, proposals, contracts, questions.
Web & mobile
Everything Finn can do, plus voice and file upload, in the browser.
Face to face
Book a video callwith your accountant.
Not a chatbot, an accountant you can actually talk to. Pick a fifteen-minute slot, click the link, ask anything. No signup, no card.
Pick a slot
Finn
Slots available in the next 48 hours
- 1Pick a fifteen-minute slot in the next 48 hours
- 2Get a confirmation email with your call link
- 3At your slot, click the link
- 4Finn appears on video and asks what you'd like to discuss
- 5Have a real conversation. Ask anything.
Your data stays in London
AES-256 at rest, TLS 1.3 in transit, UK data residency. Never used to train models.
Files direct to HMRC
MTD for VAT and Companies House connections built in, after you approve the return.
Honest about uncertainty
When confidence is low Finn says so and asks. Complex edge cases get referred to a human.
- Is Finn actually an accountant?
- Finn is an AI accountant. Trained on tax law, accounting standards, and HMRC rules. Finn does the day-to-day work a human bookkeeper or accountant would do, available 24/7. For complex edge cases, like negotiating with HMRC over a penalty, we recommend a qualified accountant. Finn is built to do 95% of the job and tell you when the other 5% needs a human.
- Can Finn take actions, or just answer questions?
- Finn takes actions. Creates transactions, raises invoices, marks things as paid, logs expenses, sets deadlines, files returns. Every write action requires your confirmation. Every action is logged in an audit trail you can review.
- How does Finn know about my company?
- Finn has full context: your transactions, invoices, deadlines, VAT status, filing history, contacts, and historical conversations. Every reply is personalised to your actual situation, not generic tax advice.
- What if Finn gets something wrong?
- Finn is honest about uncertainty. When confidence is low, Finn will say so and ask for clarification rather than guess. Every action is reversible, every change is logged, and you have a full audit trail.
- Is my data safe with Finn?
- Yes. Encrypted at rest and in transit. Stored in a UK data centre in London. Never used to train AI models. Finn only ever sees your own data.
Say hello to Finn.
Fourteen days free, no card, and nothing files without your approval.