The AI auditor that works alongside you.
Punchcard collapses substantive testing into minutes. Plain English in, audit workpapers with citations out — every judgment call still in human hands.
Up to 10× efficiency on substantive testing. SOC 2 certified. GDPR-aligned.
Trusted by audit teams at
How Co-audit works
An AI co-auditor for the work that doesn't require judgment.
Punchcard collapses the mechanical work — document matching, detail testing, tick-marking — so auditors spend their time on risk, judgment, and the client conversations that actually require professional expertise.
1. Structured client intake
Clients upload evidence into a per-selection checklist. AI validates on upload — flagging an AR aging that doesn't tie to the TB in 30 seconds, not a week later.
- Invoice — Selection #042
- Bank statement — Selection #042
- AR aging — doesn’t tie to TB
- Shipping doc — Selection #042
2. Linguistic formulas, run at scale
Start from battle-tested templates. Write prompts in plain English — the agent populates every cell, generates tick marks, and cites every value back to source.
3. Review and export to Excel
Every cell carries a reasoning trace and clickable citation. Export to standardized Excel workpapers — one click opens the source evidence without leaving the spreadsheet.
What auditors are saying about Co-audit
In her first day using Co-audit, a senior at Richey May completed revenue testing across 41 selections and 123 supporting documents in 30 minutes — work that would normally take days to do manually.
Co-audit gives our auditors back the hours that don't require professional judgment, so they can spend more time where the risk actually lives.
Steve Checketts
Partner, Richey May
For a new classification standard on insurance investment bonds, I had Co-audit scan 12,750 pages of offering memos across 15 selections and quote the sections supporting each classification, against a flowchart I wrote. That isn't a procedure we would have attempted manually.
Co-audit didn't just make the work faster — it let us do work we wouldn't have done at all.
Paige Bassoli
Associate, JLK Rosenberger
Cleaner engagements. Faster review.
Join audit teams cutting testing time by up to 10×. Get a personalized walkthrough — every judgment call still in human hands.
Trusted by RSM, Richey May, JLK Rosenberger, and more.