The Importance of Interpersonal Chemistry
Daniela Amodei, the cofounder and president of Anthropic, suggests that prospective founders should test their compatibility by spending extended time together outside of a professional setting. Speaking during a talk at the Stanford Graduate School of Business, Amodei advised that instead of immediately starting a business venture, individuals should first take a trip together and share accommodation. She noted that a successful partnership requires genuine emotional connection, suggesting that if a person is eager to spend time with their potential cofounder, the partnership has strong potential.
Conversely, Amodei warned that if the shared experience leaves one person needing a vacation just to recover from the trip, it may signal that the pairing is unsuitable. She emphasized that building a company requires founders to be perfectly synchronized regarding the overarching mission, company structure, and fundraising strategy.
Building on Strong Foundations
Amodei highlighted that her own success at Anthropic was partly due to the deep, pre-existing relationships among the core group. She stated that she was “extremely lucky” to work with a cohort of founders who had long-standing professional and personal ties, such as her brother, CEO Dario Amodei, and other cofounders she had known for 15 years. These relationships provided an established mechanism for giving constructive feedback and a shared understanding of their individual personalities.
Furthermore, Amodei stressed that all founding members must maintain absolute alignment on the business’s core purpose. She illustrated this by advising founders to write down or draw a picture of their shared vision; if one person envisions a “unicorn” while the other draws a “platypus,” the founders might believe they are aligned when, in fact, their goals are fundamentally different.
Broader Advice on Partnership Selection
The emphasis on character and rigorous vetting is echoed by other industry leaders. Paul Graham, cofounder of Y Combinator, advised entrepreneurs to prioritize character and commitment over raw ability when selecting a partner. In a 2009 essay, Graham cautioned that the most critical lesson learned from failed startups is to avoid choosing cofounders who might abandon the venture.
Andy Dunn, cofounder and former CEO of Bonobos, detailed five specific tests for potential partners before committing to a company. These tests include: 1) A stress test, involving difficult conversations; 2) A time test, which requires spending significant time together to build a bond; 3) A role exercise, defining who handles specific tasks and how decisions will scale; 4) A “when things go south” test to create a departure plan; and 5) Critically, examining differences, noting that “very divergent skill sets” are essential.
Dunn recommended treating the vetting process like a marriage, suggesting that candidates should spend enough time socializing and getting to know each other’s friends and families. Complementing this advice, Jeff Rosenthal and his business partner, Patrick Maloney, cofounders of the investment platform CIV, conducted a written exercise before launching their company. The pair exchanged detailed notes, acting “like pen pals,” outlining their corporate vision, office schedules, and mutual expectations to ensure that their strategic ideas were fully aligned.
