Built by accountants and engineers who got tired of the gap between the sophistication of modern finance and the spreadsheets holding it together.
The accounting profession is responsible for the financial integrity of the global economy. Yet the tools it relies on — spreadsheets, fragmented ERPs, manual checklists — have barely changed in thirty years.
"A single misclassified lease or overlooked disclosure can wipe millions from a balance sheet. We built Arithimatic so that never has to happen again."
We started with lease accounting because it's one of the most error-prone, standard-heavy, and consequential areas of corporate finance. ASC 842 and IFRS 16 changed the landscape — but the tooling didn't catch up. We fixed that.
Then we went deeper. Every accounting workflow has the same problem: too much manual judgment, too little traceability, and too many ways for errors to compound silently until audit time. Arithimatic replaces that fragility with AI that reasons over your standards, your documents, and your policies — and shows its work.
Our mission isn't to replace accountants. It's to give every accountant the leverage of a team ten times their size, with the confidence that every number is defensible.
These aren't just product principles — they're the philosophy that shapes how we hire, build, and serve our customers.
Every number Arithimatic produces is traceable to its source — the exact clause, section, or policy that justifies it. We don't ask you to trust our AI. We make it impossible not to verify it.
Our AI doesn't learn accounting from web data. It reasons from authoritative standards — FASB, IASB, PCAOB — loaded into a live knowledge layer that updates as standards evolve.
We automate the tedious — extraction, calculation, validation, formatting. But every automated step can be inspected, overridden, and re-explained. Humans stay in control of the judgment calls.
Our values aren't aspirational — they're operational. They show up in our code, our customer calls, and how we treat each other when things get hard.
Former Big Four auditors, FAANG engineers, and accounting standards experts — all under one roof.
We're a small, senior team. Every person here ships code, talks to customers, or does both. We're looking for people who care as much about the problem as the craft.