AI accounting software
The AI reads the paperwork. The numbers stay exact.
DecaBooks uses AI to read every document, choose the accounts and explain the books. It never does the sums: the AI reads and suggests, and the accounting engine calculates and checks.
14 days free. No card required.
- SupplierCyta
- Invoice date28/02/2026
- Net amount208.89
- VAT 19%39.69
- AccountTelephone, learned from earlier bills
- Total248.58
Sample document.
Reads any document
Receipts, supplier bills, sales invoices, bank statements, trial balances, customer and supplier balance lists and employment contracts. Photo, PDF or CSV. Each field is read with a confidence, and an unclear date is never quietly set to today.
Learns how you code
When you change an account, DecaBooks remembers it: for that supplier, for that company, across your firm and for you as an accountant. The next bill from the same supplier arrives already coded.
Ask AI about the books
Ask in plain words: what did we spend on fuel this quarter, who owes us money, why did profit fall. Ask AI reads the books and answers. If it suggests a change, nothing happens until you confirm it.
It never does the arithmetic
VAT, totals, balances and payroll are calculated by code, not by the AI. Card payouts only post when gross minus fees equals the net to the cent. If the numbers do not agree, nothing posts.
Reports explained in words
Each report can come with a short written summary of what changed and why, ready to send to a client.
Finds what you missed
It sweeps expenses for purchases that should be fixed assets, and explains the difference when a bank reconciliation does not agree.
Questions
Which AI does DecaBooks use?
Google's Gemini models, on a paid plan whose terms say your data is not used to train them. Our Privacy Policy lists every provider.
Can the AI post entries on its own?
It prepares them. Documents you upload are posted after you review them, and any change suggested in Ask AI needs your confirmation.
What if it reads something wrong?
Change the field. The correction is remembered, so the same supplier is read correctly next time.
Does the AI calculate VAT?
No. The AI reads the amounts on the document. VAT, totals and balances are calculated by the accounting engine.
See it on your own books.
Start a free 14-day trial, or book a demo and we will set it up with you.