Technical due diligence used to run on the same clock as a consulting engagement, because it was one: find a firm, negotiate a statement of work, wait for a team to be staffed, then wait two or three weeks for a manual code review and a written report. None of that timeline was about the codebase — it was entirely about the logistics of hiring humans to look at it. That's the piece that changed.
What actually consumed the old timeline
A traditional engagement's calendar time was almost never spent on analysis. It was spent on scheduling calls with the target's engineering lead to request repository access, waiting for legal to clear an NDA broad enough to cover code review, waiting for a consultant bench to free up, and then waiting again for that consultant to manually read through a codebase they'd never seen before. The actual technical assessment — once someone was finally looking at the code — often took a fraction of the total elapsed time.
What software-based diligence removes from that clock
An automated scan doesn't wait for a consultant's calendar to open up, and it doesn't need weeks to get oriented in an unfamiliar codebase — dependency graphing, dead-code detection, secret scanning, and license-compliance checks run in the same amount of time on day one of an engagement as they would in week three of a manual one. What's left to determine the timeline is read-only repository access and an NDA, both of which can be turned around in a day when the target is motivated to close.
Why a report still takes more than an hour
Read-only access and a fast engine don't compress the timeline to zero, and it's worth being specific about why. A scan surfaces raw findings — vulnerabilities, dependency risk, coverage gaps, ownership concentration — but a report an investment committee can act on needs those findings triaged, prioritized, and translated into a risk rating and a remediation cost estimate a non-engineer can read. That synthesis step is where a fast-screening engagement spends its 3-5 business days, and where a full diligence engagement spends its 1-2 weeks digging into the findings that actually matter for the deal.
Why the tier you choose changes the timeline, not just the price
An investment-screening pass is fast because it's scoped to answer one question — is there anything here that should stop this deal or change the offer — not to produce an exhaustive inventory of every finding in the codebase. A full technical diligence engagement takes longer because it goes deeper on exactly the findings a screening pass would only flag: verifying whether a security exposure is actually exploitable in production, confirming whether a bus-factor risk is as concentrated as the commit history suggests, and pricing remediation in engineer-days rather than a risk-rating label. Choosing the tier is choosing how much certainty the timeline needs to buy.
What this means for a deal team weighing whether to skip diligence entirely
The traditional 2-3 week timeline and $50,000+ price tag are exactly why mid-market and smaller deals have historically skipped technical review altogether — the diligence cost and calendar time didn't make sense relative to deal size. A multi-day, five-figure engagement changes that math for a much larger share of the deals a fund or acquirer actually looks at, which is the more significant shift than the timeline number on its own.
See how Audit Bench Ai's technical due diligence engagements are scoped →