Log in
One tool, not a stack

One tool to run your business. Not five subscriptions.

AccountsOS is your AI accountant. And because Finn runs your books, everything that feeds them lives in the same place: your contacts, your sales pipeline, quotes, contracts, invoices and chasing. One tool, £20 a month, instead of £100+ of apps that don't talk to each other.

Start free See everything Finn does

Your books are the hub. Everything else feeds them.

Most businesses run a CRM that doesn't know about the invoices, an invoicing tool that doesn't know about the books, and a bookkeeping tool that knows about none of it. You end up the integration, copying the same client and the same numbers between four apps.

AccountsOS turns that around. The accounts sit at the centre, and the things that create the accounts — the deal, the quote, the contract, the invoice — live in the same place and share the same data. Finn works across all of it, so nothing gets typed twice.

From won deal to reconciled, in one thread

Finn doesn't just record the work. It helps you win it, then bills for it.

  1. 1

    Win the deal

    A lead moves through your pipeline. Finn drafts the follow-up email or WhatsApp and flags it when it's going cold.

  2. 2

    Quote and sign

    Turn the won deal into a quote and a contract. The client details are already there from the pipeline.

  3. 3

    Invoice and chase

    One tap turns the contract into an invoice. Finn chases it if it goes late.

  4. 4

    Booked to your accounts

    The payment lands, Finn reconciles it, and it's in your P&L. No re-keying, no second tool.

Stop paying for five tools to run one business

A typical separate stack, with the kind of tool the ICP actually reaches for:

Accounting software

Xero, QuickBooks

£14–30/mo

Receipt capture

Dext

£20/mo

CRM & contacts

HubSpot, Pipedrive

£15–45/mo

Quotes & proposals

a proposal tool

£15/mo

Invoicing & chasing

FreshBooks, Chaser

£15–25/mo

Contracts & e-sign

DocuSign

£10/mo

A typical stack

£100+/mo

AccountsOS

All of the above, run by Finn, in one place.

£20/mo

Typical published starting prices, June 2026. Most businesses pay for several at once, and prices rise with users and add-ons. Your stack will vary.

Everything in one place

Bookkeeping & receipts

Bank feeds, receipts and bills land in one place and Finn categorises them. Your books keep themselves.

Receipt capture

Contacts & CRM

Every client, supplier and lead with full history, in the same place as the money they owe you.

Contacts & CRM

Sales pipeline

Track deals from lead to won on a board. Finn nudges the ones going cold and drafts the follow-up.

Pipeline & projects

Quotes, estimates & contracts

Turn a won deal into a quote, a contract and an invoice without re-typing a thing.

Estimates & quotes

Invoicing & chasing

Send invoices, set recurring ones, and let Finn chase the late payers so you don't have to.

Invoicing

Talk to all of it

Ask Finn anything across your books, clients and pipeline, on WhatsApp, Slack, Telegram, email or a phone call.

Messaging channels

One bill, one login, one source of truth

  • One set of data: your client, your deal, your invoice and your books all share it. No re-keying.
  • Finn works across all of it: chases the late invoice, nudges the cold deal, files the VAT.
  • £20/month flat, everything included. No per-seat CRM pricing, no per-feature add-ons.
  • Proper accounting underneath: double-entry ledger, P&L, Balance Sheet, VAT filed to HMRC. On HMRC's list of MTD VAT software (opens gov.uk in a new tab)
  • Cancel the other five subscriptions.

Frequently asked questions

What does AccountsOS replace?

Your bookkeeping and accounting tool, your receipt-capture app, your contacts and CRM, your sales pipeline, your quoting and contracts tool, and your invoicing and payment-chasing tool. Finn runs all of it from one set of data, for £20 a month.

Isn't a single all-in-one tool worse than best-of-breed apps?

The usual problem with all-in-one tools is that the modules are bolted together and you still re-key data between them. AccountsOS is different because everything sits on one set of records and Finn, your AI accountant, works across all of it. Win a deal in the pipeline and the contact, quote, contract and invoice already share that data. Nothing gets typed twice.

How much does it cost?

£20 a month, flat, with everything included and a 14-day free trial. A typical separate stack of accounting software, a CRM, a quoting tool and an invoice chaser adds up to well over £100 a month.

Does it still do proper accounting?

Yes. The books are the core. AccountsOS is HMRC-recognised MTD software, keeps a full double-entry general ledger, produces your P&L and Balance Sheet, and files your VAT directly to HMRC. The CRM, pipeline and invoicing are built around that core, not bolted on beside it.

Run the whole thing from one place

Your books, your clients, your pipeline and your invoicing, with Finn across all of it. 14-day free trial, no card.

Start free