Lin starts with the list everyone already knows. A very strong team, a really important problem, a large future market, and a business model different enough that you can charge more than the competition. He says every founder and every investor looks for those four. Then he says what is wrong with them: they do not limit the set. Many companies meet all four conditions, and he cannot invest in every one, so he needs a narrower test.
He gives three examples. Tony Xu grew up in the restaurant industry before he started DoorDash. Brian Chesky had thought about travel for a long time before Airbnb. The founder of Found was an accountant who ran a small business on the side and wanted to help other small businesses. For each one, Lin asks the same question: why do they fit in this market?
In a pitch, he hears fit as depth. The founder has taken the industry apart and cannot stop thinking about the problem, often because they or someone in their family felt the pain.
Deep founders also know where to stop. In an industry built on a hundred assumptions, Lin says, the founder he backs attacks about five of them.
In March 2026 he described a second question. Sequoia looks at the founder's journey, how they got here and what makes them tick. Then it asks for your spike, the thing that sets you apart:
His advice to founders is to make the spike bigger and keep their weaknesses from turning into liabilities.