A reference check is diligence through third parties who know the subject professionally — validating claims in the pitch, surfacing risks decks omit, and testing culture fit.

How it works

Investors ask founders for five to ten names — former investors, co-founders, direct reports, customers — then also run back-channel calls outside that list. Questions target decision quality, capital efficiency, honesty under stress, and how they treat people when plans fail. Executive hires and board additions get the same treatment. References are weighted by relationship: a peer who shipped product with the founder beats a casual advisor intro.

Founders should brief references on stage and thesis so answers stay concrete, not generic praise.

Why it matters

• Founders: Prepare references with permission; surprise calls to old employers without heads-up damage trust.
• Investors: Reference patterns separate repeatable operators from storytellers.
• Candidates: Negative references are not automatic kills — context and multiple data points matter.

Common mistake

Listing references who only know the founder socially. Investors discount them and dig harder elsewhere.

Related ideas

Due diligence, back-channel references, customer calls, and executive recruiting.