By the time an investor says they want to move forward with a deal, the real evaluation is only beginning. Due diligence is the process of verifying that what a founder said in the pitch actually holds up once someone looks closely at the documents, the numbers, and the people behind the company.
Corporate and Legal Standing
Investors confirm that the company is properly incorporated, that all shares and options were issued correctly and are reflected accurately on the cap table, and that there are no undisclosed liabilities, disputes, or litigation risks. A messy cap table, missing signatures on old founder agreements, or unresolved IP assignment from a co-founder who left years ago are common findings that can slow or kill a deal even when the business itself is strong.
Financial Health and Accuracy
Investors want to see that the financial statements and metrics presented in the pitch match what is actually in the company's books. This includes revenue recognition practices, burn rate, runway, outstanding debt, and any related-party transactions. Discrepancies between the pitch deck's numbers and the underlying financials are one of the fastest ways to lose investor trust, even when the discrepancy turns out to be an honest mistake rather than a deliberate misrepresentation.
The Team and Its Commitment
Investors look closely at the founding team's equity ownership, vesting status, and any side commitments, such as other jobs, other companies, or unusual personal financial arrangements, that could compete for a founder's time or attention. Reference checks with former colleagues, co-founders, and early customers are standard practice, not a formality.
Product, Technology, and IP
For technical products, investors evaluate whether the technology actually does what is claimed, how defensible it is, and whether the company owns the intellectual property outright, including confirming that all contributors, employees, contractors, and any co-founders, have properly assigned their IP to the company. Any code, patents, or trademarks built by a contractor without a clear IP assignment agreement is a real risk that diligence is specifically designed to catch.
Customer and Market Validation
Investors verify customer claims directly where possible, checking contract terms, actual usage or retention data, and customer concentration risk, meaning how much of revenue comes from just one or two customers. A business that looks strong in aggregate can look fragile once diligence reveals that most of its revenue depends on a single customer relationship that could end at any time.
Regulatory and Compliance Exposure
Depending on the sector, this can include data privacy compliance, industry-specific licensing, employment law compliance, and tax filings. Regulatory gaps discovered during diligence do not necessarily kill a deal, but they often result in specific conditions or holdbacks written into the final term sheet to address the risk before or after closing.
The Two Phases of Diligence
Diligence usually happens in two stages. A lighter, faster round of soft diligence typically happens before a term sheet is signed, focused on confirming the basics the pitch relied on: headline metrics, market size assumptions, and a general sense of the team and product. The deeper, more exhaustive round of confirmatory diligence happens after a term sheet is signed, once both sides have agreed on price and terms in principle, and is where investors and their legal counsel work through the detailed document review described above. A deal falling apart during confirmatory diligence, after a term sheet was already signed, is more damaging to a company's momentum and reputation than one that never gets a term sheet at all, which is why founders should treat even the earlier soft diligence conversations with real seriousness.
Common Findings That Slow Deals Down
Certain issues come up often enough across diligence processes that they are worth anticipating rather than discovering under time pressure: a cap table that does not reconcile against actual signed documents, option grants issued verbally or by email without a formal signed agreement, IP contributed by a contractor or advisor who never signed an assignment agreement, revenue or user metrics defined inconsistently between different pitch materials, and related-party transactions that were not clearly disclosed upfront. None of these are necessarily deal-breakers on their own, but each one adds time, and time is the resource that erodes deal momentum fastest.
How This Shows Up in the Data Room
Almost everything diligence teams ask for eventually gets organized into a single data room, a structured set of documents the company shares with the investor under confidentiality. Founders who assemble a clean, complete data room before diligence starts, rather than scrambling to produce documents on request, tend to move through the process noticeably faster and with fewer surprises on either side.
Working With Advisors During the Process
Experienced startup counsel and, where relevant, an accountant familiar with venture-backed companies can catch issues in the company's own records before an investor's team does. This is particularly valuable for cap table reconciliation and IP assignment review, since both require comparing a large number of documents against each other for consistency, work that is easy to get wrong under time pressure and hard to catch without deliberately setting aside time to do it properly before diligence starts, not during it.
What Founders Can Do to Prepare
The most useful preparation is treating the company's own records the way an outside investor eventually will: reconcile the cap table against actual signed documents, confirm every option grant has a signed agreement, make sure IP assignment is complete for every contributor, and keep financial statements consistent with whatever numbers appear in fundraising materials. None of this is glamorous work, but it is exactly what determines whether diligence is a quick formality or a drawn-out process that erodes deal momentum. Treating this as ongoing housekeeping rather than a pre-raise scramble means the company is always effectively diligence-ready, which matters because a strong investor relationship can move quickly once both sides are aligned, and a messy set of records is the most common reason that speed gets lost.