Beyond filing.
Built for decisions.
Acorn 9 is a tax & accounting firm built for startups. We pair AI-native workflow with licensed CPAs so founders get the speed of software and the accountability of a real accounting firm — not one at the expense of the other.
Why we exist
Most startups outgrow their first bookkeeper the moment things get interesting — a priced round, a second entity, equity to track, R&D credits to capture, multi-state exposure. That is exactly the point where the spreadsheet-and-email accounting firm starts to slow them down, and where mistakes get expensive.
We think the answer is not more humans doing manual work, and not software pretending it can sign a return. It is both, in the right order: AI does the mechanical work, and a licensed CPA owns the judgment.
How we work
Every engagement runs through three stages — Collect, Prepare, Deliver. AI agents handle the work that does not need a human: gathering documents, preparing the ledger, cross-validating against prior years and source documents, assembling filings. A licensed CPA on our team reviews, makes the judgment calls, and signs off before anything leaves the firm.
The result is the turnaround founders expect from a product and the standard of care they need from a tax & accounting firm — bookkeeping, corporate tax, filings, and the financial picture behind the next decision.
What we believe
- A CPA signs the work. Automation drafts; a licensed professional is accountable for what gets filed.
- Speed is a feature of correctness, not a trade against it. Faster books are only useful if they are right.
- Founders should see the decision, not just the filing. The numbers exist to inform the next move — runway, hiring, the next raise.
A note on our CPAs
Tax content on this site is reviewed by licensed CPAs on our team. We do not publish the names of individual team members. Where a post carries the "Reviewed by a licensed CPA on the Acorn 9 team" line, that review has happened.