Due diligence is the verification process that occurs between a term sheet and a closed investment. The investor is confirming that what the startup represented in the pitch process is accurate and complete. At seed stage, due diligence is typically light: reference calls on the founding team, financial model review, key contract review, and cap table verification. At Series A and beyond, it becomes a comprehensive process involving legal, technical, financial, and commercial diligence tracks.
The purpose of due diligence is asymmetry reduction. Founders know far more about their business than investors do at the point of receiving a term sheet. Due diligence is the investor's mechanism for narrowing that information gap before committing capital. Areas that commonly reveal problems include: inconsistent financial representations (the model doesn't match the bank statements), key-person dependency on a co-founder who has already departed, undisclosed IP disputes, and customer concentration that wasn't apparent in the high-level pitch.
From a founder's perspective, the best way to manage due diligence is to have a clean, well-organised data room before it begins. Investors conducting diligence on a chaotic cap table with missing legal documents will lose confidence — not because the problems are necessarily fatal, but because the disorganisation signals something about how the founders run their business. Preparing for diligence as a discipline, even before any investor has expressed interest, is a mark of operational maturity.