definition

Due diligence is the process of carefully investigating and verifying the facts about a company before making a financial commitment, such as an investment, acquisition, or partnership.

It’s the “trust, but verify” step that ensures what’s being presented in a pitch deck or financial statement actually holds up under scrutiny.

The concept dates back to U.S. securities law in the 1930s, where underwriters were required to exercise a “due diligence defense” by thoroughly checking company disclosures before offering securities to the public.

The practice extends far beyond legal compliance. For investors, due diligence can cover financial records, market potential, technology, intellectual property, customer traction, and the strength of the founding team. The depth of the process varies by deal size.

Private equity firms often run extensive audits, while angel investors might focus more on team dynamics and growth potential.

A real-world example is Theranos, the blood-testing startup that raised hundreds of millions before collapsing. Had investors conducted deeper due diligence on the technology and clinical results, red flags might have surfaced earlier, potentially avoiding major losses.

In the startup ecosystem, due diligence is almost always the first step after an initial pitch. Venture capitalists, private equity funds, and angel investors all use it to validate assumptions, uncover risks, and ensure alignment with their portfolio strategy.

For founders, understanding this process is critical: being prepared with accurate data, transparent answers, and organized documentation can significantly increase the chances of securing funding.