The No.1 reason startups fail in the first two years, according to a VC

A venture capitalist says one of the biggest reasons startups fail hinges on the relationship between co-founders.

Reece Chowdhry, founding partner of Concept Ventures, said early teams often split within two years because their co-founders clash or lack a shared vision. His venture capital firm, founded in 2018, says it is Europe’s largest pre-seed fund, which focuses on startups at the ideation stage. It recently announced it had raised $88 million for its newest fund.

Chowdhry told CNBC Make It that he invests based on founders’ personalities and traits before they even have a product. There are four to five key traits he looks for in a startup before going all-in, Chowdhry explained.

“I think 80% of our decision is on founders and we are typically the first investor in every company we invest in,” Chowdhry said in the interview.

“The number one reason companies typically fail in the first 18 to 24 months is that founders fall out with each other or don’t get along, don’t have the same vision alignment, purpose, and so that is something that we think is really important,” he said.

In the initial meeting with founders, Chowdhry emphasized that co-founder chemistry is one of the key characteristics he looks for.

“One of the things we’re very obsessed with is ‘How well do you know each other? Have you gone through something meaningful in life? If I interview you both separately, will the answers also match? What will that person’s strengths be? What will that person’s weaknesses be? And do you intimately know each other?

“If I gave the New York Times’ dating questions, would they match up to a level where you would really intimately know people at their core?”

Other core traits that Chowdhry looks for in founders include an obsession with a specific field or industry, relentlessness and grit, a growth mindset, and evidence of exceptionalism in something outside of work, such as sports or chess.

Concept Ventures was an early backer of $3 billion voice AI company Eleven Labs, co-founded in 2022 by Mati Staniszewski and Piotr Dąbkowski. Chowdhry said two key traits in his meeting with Eleven Labs’ co-founders stood out and persuaded him to invest.

“The two things that stood out were domain obsession, so literally thinking about that problem for a long time and the team dynamics. They were like childhood friends. They knew each other super well. They complemented each other really well,” he added.

Y-Combinator co-founder and startup guru Paul Graham shared similar wisdom in a blog. He warned that solo founders faced an uphill climb, noting that most successful startups have at least two or three founders.

In one post, Graham wrote that a startup with only one founder is “a vote of no confidence” because it suggests they couldn’t convince any of their friends to join. However, failure is possible, even with multiple founders.

“The…