Accounting is 5,000years old. It has beenautomated for about40 of them.

We build the environments that finish the job.

Five thousand years, abridged

The oldest information system on earth. Every time it changed.

c. 3300 BC
Writing is invented to keep accounts.
85% of the earliest known tablets are inventories.
1494
The textbook is printed in Venice.
Pacioli invented nothing. He wrote down what merchants already did.
1826 · 1834
England stops keeping its national accounts on notched sticks.
Eight years later the leftovers burn, and take the Palace of Westminster with them.
1985
Excel ships, on a Macintosh.
The last time the tooling fundamentally changed.
2002
Eight firms become four.
Nobody has entered since.
2019
The audit report is revised.
The SEC: it had "generally remained unchanged since the 1940s."
2026 · the close
5,326Years elapsed

The median company still waits this long after the month ends to find out what happened in it.

2026 · the audit
4,734Auditor hours

Then the year ends and the audit starts. Two and a half person-years of it, on one engagement, one company.

Listed companies, KOSPI main board, averaged 2024. The only market that publishes the figure.
Chapter 01

The oldest information system on earth. Every time it changed.

c. 3300 BC

Writing is invented to keep accounts.85% of the earliest known tablets are inventories.

1494

The textbook is printed in Venice.Pacioli invented nothing. He wrote down what merchants already did.

1826 · 1834

England stops keeping its national accounts on notched sticks.Eight years later the leftovers burn, and take the Palace of Westminster with them.

1985

Excel ships, on a Macintosh.The last time the tooling fundamentally changed.

2002

Eight firms become four.Nobody has entered since.

2019

The audit report is revised.The SEC: it had "generally remained unchanged since the 1940s."

2026

6 days.That is how long the median company still waits, after the month ends, to find out what happened in it.

2026

4,734 hours.Auditor time on a single annual engagement. Two and a half person-years. Listed companies, KOSPI main board, averaged 2024. The only market that publishes the figure.

What is at stake

The largest verification workload on earth, done by hand.

$220B
Four audit firms. 1.5 million people.
$135B
Investment banking fees. One year.
$477B
American tax compliance. Seven billion hours.
>$1T
Every year, to check work that has a right answer.
None of it buys insight. It buys assurance.
Even then

The regulator found a deficiency in 46% of the audits it inspected.

Environments

We build worlds, not datasets.

A dataset says what someone once did. An environment makes the model do the work, in a real ledger, against a real answer.

Ledgers that run a year. Subledgers that have to tie. And somewhere inside, the error a good accountant finds on the third pass.

I

Real state, real order

Month six inherits month five.

II

Deterministic verifiers

Six invariants. Arithmetic decides, not a panel.

III

Authored answer keys

Never in a pretraining corpus. Never will be.

Accounting
Investment banking
Private equity
Insurance
Who builds them

Built by people who did the work.

Bank of America
Citi
OneMain Financial
Deloitte
Google
Honeywell
HP
Verita AI

Our team has come from these companies, among others.

Research

So we ran it.

Every model in the field fails at least one task outright.

26 runs balanced the ledger and still got it wrong.

Read the benchmark
Strict passes36 / 105
Verifier only62 / 105
Looked right26
RL-trainable cells11 / 35

Finance needs to enter the modern era.