Why “How Long Does This Take” Has No Clean Answer
Ask ten SaaS founders how long a buyer’s security review adds to a deal and you will get ten different guesses, none of them sourced to anything more solid than one bad experience. That is not a research gap this guide can close with a better search query: no vendor or research house publishes a benchmarked average review duration in weeks or days. What gets tracked instead is perception data, spend-priority data, and questionnaire scale, real numbers, just not the one number founders actually want.
That honesty matters more than a tidy answer would. A guessed number, repeated confidently enough, becomes the wrong planning assumption for every deal that follows it.
The Question-Count Math Behind the Time Cost
A single Standardized Information Gathering questionnaire, the document most enterprise buyers use as their baseline vendor security assessment, can run past 800 questions, per Vanta’s own guide to security reviews. That is the real, physical scale of the task a compliance-immature vendor suddenly faces, often on a deadline, often without a single person whose job is answering it.
This is reasoning, not a cited hours figure: answering hundreds of detailed security and compliance questions honestly means pulling documentation that may not exist yet in one place, looping in whoever actually owns each control, network access, data retention, incident response, and getting sign-off before anything gets submitted. None of that happens in an afternoon, and none of it is work a sales team can do on the buyer’s behalf.
What an 81% Faster Claim Tells You About the Unautomated Default
Vanta’s own Questionnaire Automation product claims to complete security reviews 81% faster, automatically answering more than 80% of security questions with up to a 95% acceptance rate on its AI-generated answers. A vendor only builds and markets a product around cutting time out of a process that genuinely wastes a lot of it. Treat the 81% figure as indirect but real evidence of how slow the manual default runs, not as a duration statistic in its own right, since Vanta does not publish what the unautomated baseline actually was in absolute time.
This Is a Budgeted Line Item, Not a Favor Someone Is Doing You
It is tempting to read a stalled review as one overcautious IT person slowing your deal down out of habit. KPMG’s 2026 Global Third-Party Risk Management Survey, an 851-organization study, says otherwise: 52% of organizations name risk assessment and due diligence their single largest area of third-party risk spending, ahead of tooling, cybersecurity, and audits combined. That is a formally resourced, prioritized function competing for its own budget inside a buyer’s organization, not an individual’s personal caution.
Why the Gate Is Getting Slower to Clear, Not Faster
The same KPMG survey found only 18% of organizations have achieved full integration between third-party risk management and enterprise risk management, with 53% reporting their programs are mostly integrated, and 71% planning further integration over the next three years. A process that most organizations are actively investing to formalize further is not a temporary bottleneck working itself out. It is a structural, growing part of how enterprise SaaS deals close, which argues for planning around it rather than waiting for it to loosen.
Pricing the Delay Into Your Own Forecast Instead of Guessing
Since no external benchmark exists to import, the honest fix is internal: track how long each deal that triggers a formal review actually takes from the moment the questionnaire lands to the moment it clears, deal by deal, and use that real number in forecasting instead of a borrowed industry average that may not describe your buyers at all. This pairs directly with the wider statistics behind why security review is intensifying industry-wide, not just at your company.
Where a Sales Team Can Actually Save Time in This Process
None of the numbers above are inside a sales team’s control. What is inside its control is when the review enters the conversation. A team that only learns a formal review exists after pitching a demo loses weeks it could have spent preparing an answer set in parallel with the rest of the sales cycle. A team that asks early, does your company run a formal vendor security review, and if so, who owns it, turns a mid-deal surprise into a known, planned-for stage.
Human + AI SDRs can carry that exact question into a first SMS conversation, flagging a likely review before a demo even gets booked instead of after a deal has already stalled inside one.
What this means for you
- A single SIG questionnaire can run past 800 questions, and Vanta’s own automation product markets an 81% faster completion claim, indirect evidence of how slow the manual default runs.
- 52% of organizations name risk assessment and due diligence their single largest area of third-party risk spending, per KPMG’s 851-organization survey, evidence this is a budgeted function, not one cautious stakeholder.
- Only 18% of organizations report full integration between vendor risk management and enterprise risk management, and 71% plan further integration over the next three years, meaning this gate is getting more formal, not less.
Sources
The external data in this guide draws on the sources below. Figures described in the text as estimates or industry triangulations are directional and are not attributed to a single dataset.