“I’ll run the books. You run the business.” — Finn
Your AI CFO.
Meet Finn.
Finn does the lot: books, taxes, VAT, and the admin nobody owns, free while we’re in Early Access. No reports to chase, no deadlines to track. Talk to her wherever you already work: chat, voice, email, WhatsApp, Slack, Telegram.
Free during Early Access, then $12/month · No credit card required
Ask Finn anything
One Finn. However you talk to her.
- Built secure
- Two-factor authentication
- Bank-level encryption
- Read-only bank access
- Row-level data isolation
- AI never trains on your data
The shift
AI-native, not AI-bolted-on.
Every other accounting tool is a 2010-era ledger with a chat box stapled to the side. AccountsOS was built the other way around: AI first, every screen second.
The old way
- —£100-300/month accountant who responds in 2 days.
- —£20-35/month software that needs a 6-hour onboarding call.
- —You enter every transaction. You categorise every receipt.
- —One country, one currency. One entity at a time.
- —Tax advice arrives a month after you needed it.
With Finn
- An AI CFO that answers in 4 seconds, 24/7.
- One sign-up, no setup call, no training. Talk to it.
- Forward an email. Drop a CSV. Snap a receipt. Done.
- 21 countries today, multiple entities under one login.
- Tax savings flagged the moment they appear.
Capabilities
What Finn actually does for your business.
Bookkeeping
Your books just happen.
Forward a receipt, drop a CSV from any bank, or snap a photo. Finn extracts it, categorises it, reconciles it against your invoices and bills, and posts it to a proper double-entry ledger. You review the exceptions, not every line.
Tax & compliance
Tax, handled before it's due.
Finn tracks every deadline from Companies House, calculates your VAT and Corporation Tax as you go, and files VAT straight to HMRC. It flags savings while you can still act on them: claimable expenses, the right salary and dividend split, an overdrawn director's loan before it costs you.
Cash flow
Money in, money out.
Send branded invoices in any currency, set them to recur, and let Finn chase the late ones for you. Track your bills and what you owe, run payroll with the right deductions, and handle expense claims with approvals and one batched payout.
Reporting
Know your numbers, without a spreadsheet.
Profit and loss, balance sheet, VAT summary and cash-flow forecast, live from your ledger. Ask Finn “how much did I spend on software last quarter?” and get the number back, with the transactions behind it.
AI-native
Finn works the way you do.
Chat, talk, or forward an email. Finn answers in your browser, by voice, on WhatsApp, Slack and Telegram, even from inside Claude Desktop and ChatGPT. And Finn does not just answer: with your say-so, it creates the invoice, logs the expense, files the return.
Why Finn
Three things no other accounting tool can say.
Finn acts, it does not just answer.
Most AI tools talk. With your approval, Finn creates the invoice, files the VAT return, pays the bill, chases the late payer. A colleague, not a chatbot.
Your books, inside Claude and ChatGPT.
Ask about your numbers from Claude Desktop or ChatGPT over MCP, not just our app. Almost no other accounting platform lets you do this.
Ten real tax engines, not a translation.
CT600 and VAT MTD in the UK, 12.5% corporation tax in Ireland, free zones in the UAE, 10% flat in Bulgaria. Every country has its own rules, deadlines and registry.
Real activity on AccountsOS today
Multi-country
One CFO. Every jurisdiction.
Live in 21 countries across 4 continents. Each one with its own tax engine, registry sync, and currency — not a generic translation.
Up and running in minutes
Three steps. No migration headaches.
Sign up
Create your account and connect your company via Companies House. Takes 2 minutes.
Connect your books
Upload bank statements, forward receipts, or import from your existing tool. We handle the rest.
Finn takes it from here
Your AI CFO categorises transactions, tracks deadlines, files taxes, and tells you what to do next.
Everything included
One platform. One price. The whole finance stack.
75+ features, no add-ons, no per-seat fees. A sample of what is in the box:
AI & assistant
- Finn on every page
- Voice that acts
- Document intelligence
- Persistent memory
- Support mode
Bookkeeping & banking
- Any-bank CSV/PDF import
- Auto-categorisation
- Bank rules
- Reconciliation
- Double-entry ledger
Tax & filing
- VAT MTD to HMRC
- Corporation Tax + marginal relief
- Annual accounts wizard
- Deadline reminders
- Self assessment
Invoicing & money
- Multi-currency invoices
- Recurring + auto-chasers
- Bills & payments
- Estimates & quotes
- Dividends & vouchers
Payroll & expenses
- Payroll with RTI
- Expense claims
- Approval workflow
- Mileage & home office
- Batched reimbursement
Reports
- Profit & loss
- Balance sheet
- VAT summary
- Cash-flow forecast
- Trial balance
Integrations
- Claude Desktop & ChatGPT
- WhatsApp, Slack, Telegram
- Companies House
- Plaid, Stripe, Wise, Mercury
- Deel
Security
- Two-factor auth
- Bank-level encryption
- Row-level isolation
- Audit trail
- AI never trains on your data
A CFO for $12/month.
Founders typically spend hundreds a month on accountant + bookkeeping software + receipt scanning + payroll + invoicing. Finn replaces all of it.
| What you're replacing | Typical cost |
|---|---|
| Accountant | £100-300/month |
| Bookkeeping software | £20-35/month |
| Receipt scanning | £15-30/month |
| Payroll software | £10-20/month |
| Invoicing tool | £10-20/month |
| Traditional total | £155-405/month |
| AccountsOS | Free* |
*Free during Early Access — then just $12/month
Sign up now to lock in $12/month forever when paid plans launch (standard price $24/month)