The Real Startup Killer: Co-Founder Conflict
Reece Chowdhry, founder of Concept Ventures the largest pre-seed venture capital firm in Europe has pinpointed the primary reason most startups collapse within their first 18 to 24 months: a breakdown in co-founder relationships. While product-market fit and financial runway are often cited as leading causes of startup failure, Chowdhry argues that internal dynamics are far more decisive. In his view, if co-founders clash or lack alignment on vision, purpose, and values, the startup is likely to unravel long before product issues even emerge.
This insight is rooted in Chowdhry’s investment philosophy. His firm, which just closed an $88 million fund, typically backs startups at the ideation stage before any product exists. For that reason, Chowdhry allocates 80% of his investment decision-making process to evaluating the founding team. Rather than focusing on technical capabilities or business plans, he examines the chemistry between co-founders.
Team Dynamics Over Product Features
Chowdhry’s investment approach centers around behavioral and relational assessments. He often interviews co-founders separately to determine whether their responses align and whether they know each other deeply beyond surface-level collaboration. Drawing a metaphor from the New York Times’ dating questionnaire, he measures whether co-founders have the emotional and cognitive understanding necessary to endure the intense startup journey.
For Chowdhry, ideal teams are not just technically compatible they must complement each other in temperament, decision-making pace, and social magnetism. One founder might be the visionary, while the other ensures execution. One may be fast-thinking and instinctive, while the other is deliberate and analytical. The goal is not just to find harmony but to detect whether the team can evolve together under pressure.
This was evident in Concept Ventures’ early bet on voice AI unicorn Eleven Labs, co-founded by Mati Staniszewski and Piotr Dąbkowski. Chowdhry noted that two key factors influenced his decision to invest: the co-founders’ deep, long-standing relationship and their domain obsession. Their complementary skill sets and history as childhood friends offered a strong foundation for trust, resilience, and long-term alignment.
Beyond the CEO: VCs Must Evaluate the Whole Founding Team
In contrast to traditional venture capital models that often focus heavily on the CEO, Chowdhry stresses that early-stage investment must evaluate the entire founding team. He challenges the bias many investors have in weighing their confidence solely on the CEO when 50% or more of the business may depend on the contributions of other co-founders. In Europe especially, where many startups have technically focused founders, Chowdhry seeks teams with strategic diversity not just in coding skills, but in personality, persuasion, and leadership balance.
He emphasizes qualities such as grit, a growth mindset, and evidence of exceptionalism in non-professional fields (such as competitive sports or chess) as predictors of founder resilience. These traits suggest the psychological fortitude required to endure the volatility of startup life.
Y Combinator’s Paul Graham Echoes the Warning
Chowdhry’s warning echoes the perspective of Paul Graham, co-founder of Y Combinator, who has long cautioned against the risks of solo founders. Graham argues that the absence of co-founders reflects a lack of validation and support essential elements in navigating startup challenges. Even with co-founders, however, Graham underscores that relational strength is non-negotiable. The startup process, he famously noted, “does to the relationship between the founders what a dog does to a sock: if it can be pulled apart, it will be.”
This analogy reinforces the idea that co-founder cohesion is not merely advantageous it is essential to survival.
The Intangible Foundation of Success
While many investors focus on market timing, scalability, or proprietary technology, Chowdhry believes that the real early-stage differentiator is the human equation at the core of a startup. Team dynamics, emotional compatibility, and shared vision are not just soft skills they are structural foundations that determine whether a startup can weather the brutal early years.
Concept Ventures’ track record, including early investments in unicorns like Eleven Labs, underscores the importance of prioritizing people over products in pre-seed investing. For founders and investors alike, the message is clear: the biggest risk isn’t the market it’s the team.
Source: CNBC