Investors used to evaluate a startup on three things: the team, the market, and the traction. Security wasn't part of the conversation unless the company was explicitly building a security product. That's no longer true. Technical and security due diligence has become a standard part of how venture capital evaluates a deal, and startups walking into a raise without anything to show for it are increasingly finding that out mid-process, at exactly the moment it's most disruptive to fix.
Why investors started asking
The shift has a clear cause. Roughly two-thirds of VCs now say they conduct some form of cybersecurity due diligence before committing capital, and for good reason: more than half of startups experience a cyber incident within their first two years of operation . A security gap discovered after a check clears isn't a minor annoyance for an investor, it's a direct threat to the thing they just bought equity in. A breach post-close can trigger regulatory exposure, destroy customer trust in a company that was supposed to be scaling that trust, and materially damage the valuation the investor just underwrote. Cyber risk found during diligence, or worse, found after the round closes, can reduce a startup's valuation, delay the round entirely, or in the more serious cases, kill the deal outright .
This mirrors exactly what's already happened in M&A, where cybersecurity has gone from an afterthought to a genuine valuation driver over the past several years. Fundraising is simply catching up to the same reality: capital increasingly assumes a baseline of technical diligence, and startups that can't produce evidence of it are negotiating from a weaker position before the term sheet conversation even starts.
What investors actually ask for
Security due diligence during a raise typically shows up in one of a few forms, and knowing which one you're likely to face helps you prepare the right materials instead of scrambling generically.
A security questionnaire is the most common entry point, especially at earlier stages, covering how you handle customer data, what infrastructure you run on, whether you've had any prior incidents, and what access controls exist around your systems and codebase. For larger rounds, especially Series A and beyond, or for startups handling any kind of sensitive data, that questionnaire frequently escalates into a request for actual evidence: a recent vulnerability assessment or penetration test report, documented compliance posture like SOC 2 or ISO 27001, and in some cases, a technical interview with your engineering lead covering architecture and access management directly.
The specific categories that come up consistently: infrastructure and cloud architecture, how authentication and access control are structured across your team and your product, what third-party vendors and integrations touch your systems, how sensitive data is stored and who can access it, whether you have an incident response plan and any incident history to disclose, and increasingly, for startups building with AI coding tools, whether generated code has actually been independently reviewed for the kind of vulnerabilities those tools are known to introduce.
What startups should actually have ready
A recent, dated vulnerability assessment. This is the single highest-leverage document you can walk into diligence with. A vulnerability assessment covering your core web application, API, and cloud account, dated within the last several months, answers the most basic version of an investor's question directly: has an independent third party looked at this, and what did they find. A clean or resolved report is concrete evidence, not a verbal assurance that "security is a priority."
A penetration test report, for larger or later-stage raises. If you're raising a Series A or beyond, handling regulated data, or selling into enterprise customers who themselves require evidence of security testing, expect the bar to move past a vulnerability assessment toward a full penetration test, one that includes authenticated testing across identity and access controls, not just external scanning. Investors doing diligence on a company that's about to sell into finance, healthcare, or other regulated verticals will specifically look for this depth, because they know your future customers will ask for it too.
Documented remediation history. Having a report that shows findings from six months ago is only half the story if there's no evidence those findings were actually fixed. A retest confirming that previously identified vulnerabilities were resolved is exactly what turns a report from "here's what was wrong" into "here's proof it's handled," and it's a materially stronger position to negotiate from than a report with open items nobody's followed up on.
A current asset inventory. Investors doing deeper technical diligence sometimes probe specifically for this: do you actually know what you're running. A startup that can clearly account for every domain, subdomain, and externally hosted service tied to its product signals operational maturity. One that can't, or that discovers forgotten staging environments and abandoned campaign sites mid-diligence, signals exactly the kind of disorganization that makes investors nervous about what else hasn't been tracked.
Compliance posture, even before formal certification. You don't need a completed SOC 2 report to raise a seed round, but you should be able to articulate where you stand: what controls are already in place, what your roadmap toward formal compliance looks like, and why that timeline makes sense given your stage. Investors aren't expecting a pre-seed company to have ISO 27001 certification. They are expecting founders to know what's required and have a credible plan.
Data handling and privacy documentation. A clear, written account of what customer data you actually collect, where it's stored, who has access to it internally, and what safeguards exist around it. This matters even for startups that don't think of themselves as handling "sensitive" data, because investors are evaluating downside risk broadly, not just headline-grabbing breach categories.
An honest incident history. If something has happened, a security incident, a close call, an exposed credential that got caught and rotated, disclosing it with a clear account of what happened and what changed afterward is a stronger position than having it surface independently during diligence. Investors are generally less concerned with whether an incident ever happened than with whether the team handled it competently and learned from it.
Access control practices, especially for AI-built products. If your product was built partly or entirely using AI coding tools, and for a growing share of early-stage startups, it was, be ready to speak specifically to how you've verified the generated code doesn't carry the access control and authentication issues those tools are known to introduce by default. This is an increasingly specific line of questioning from technically sophisticated investors, and "we used Cursor and reviewed it ourselves" is a materially weaker answer than "we had an independent assessment specifically scoped to check for it."
Timing this correctly
The mistake most founders make isn't failing to eventually produce this material, it's producing it reactively, after an investor's diligence team specifically asks, under whatever timeline that request imposes on an already-moving deal. Fundraising timelines are notoriously compressed and unpredictable. A term sheet can arrive faster than expected, and a technical diligence request that lands mid-negotiation with a two-week turnaround expectation is a bad time to be starting your first-ever security assessment from zero.
The better model is having this ready before you're in a room asking for money, not after. That means running a vulnerability assessment as part of your standard pre-raise preparation, alongside cleaning up your data room and finalizing your financial model, rather than treating it as a diligence-triggered scramble. For seed and early Series A rounds, a scoped vulnerability assessment covering your core application and cloud infrastructure is usually sufficient to answer what most investors at that stage will actually ask. For later rounds, or for startups in regulated spaces, building in time for a deeper penetration test before you start fundraising conversations, not after a term sheet arrives, keeps you from negotiating from behind.
Why a stale report is almost as bad as no report
An assessment from eighteen months ago doesn't hold the same weight it did when it was fresh, and a sharp technical diligence process will ask for the date before it asks for anything else. Between then and now, your codebase has changed, your infrastructure has probably grown, and any startup moving fast enough to be worth investing in has almost certainly shipped enough since then that the original assessment no longer reflects current reality.
This is exactly why the startups that never get caught flat-footed on this front are the ones running assessments on a recurring cadence rather than treating it as a one-time, pre-raise checkbox. Fundraising timing is genuinely hard to predict, a round can open up faster than planned, an inbound investor conversation can accelerate unexpectedly, and the only reliable way to always have a current, credible report on hand is to already be running one. A quarterly vulnerability assessment cadence means that whenever the raise conversation actually starts, you're not starting your security posture from zero, you're pulling a report that's current within the last few months and handing over evidence instead of promises.
Building this into your raise preparation
The practical sequence: scope a vulnerability assessment covering your web application, API, and cloud account well before you start actively fundraising, not after a term sheet triggers a diligence request. Ceron's core audit is built for exactly this timing, a fixed $1,500 engagement that starts the same day scope is agreed and runs on a no findings, no fee model, fast enough to fit into pre-raise preparation without becoming its own bottleneck. If your raise involves regulated data, enterprise customers, or investors likely to request deeper technical diligence, layer in an extended audit with authenticated penetration testing across identity and access controls, scoped and quoted around your specific environment rather than sold as a flat product.
And once that first assessment is done, don't let it go stale waiting for the next round. Rolling into a recurring quarterly cadence means that whenever your next raise actually happens, on whatever timeline it actually moves on, you're walking into diligence with a current, evidence-backed report instead of scrambling to produce one under deal pressure. Investors are increasingly going to ask this question regardless of what stage you're at. The founders who've already answered it before the question gets asked are the ones who keep the leverage in the room.
