In the nullish app, the assistant is asked three questions about the company's books: how much a client paid this year, what is left on the bank account, and how much VAT is owed for 2026. It answers each one with figures taken from the accounting: the client's paid invoices, the bank balance with money in and out since the start of the year, and the VAT due under the net rate method.

// the fun part

Accounting isn’t exactly exciting. So we added a few twists.

• No dashboard. Just ask.

  “Which invoices are still open?” or “Mark invoice 42 as paid.” In the app or from your own AI agent.

• QR-bills that don’t gossip.

  Payment references are random, so your clients can’t read how business is going.

• Hide the numbers.

  Blur the amounts when someone’s reading over your shoulder.

• Invoices that look like you.

  Customize the whole template, not just a logo and a line of text.

• Crypto? Sure.

  Every currency gets the decimals it needs, even all 18 of them for Ether.

• Open source.

  Audit every line, run it on your own servers, change what you need.

// the boring part

And of course, all the basics.

Billing

clients / invoices / Swiss QR-bill / paid, void, written off

Banking

import / reconciliation

Accounting

journal / VAT, net rate or effective / balance sheet / income statement / year-end closing

Team

invite your colleagues / an accountant / a reviewer

• Developed in Züri

  nullish is designed and built in Zürich.

• Hosted in Switzerland

  Your data stays on Swiss infrastructure.

• The AI lives in Switzerland too

  Your questions never leave the country.