Daniela Amodei shares her test for finding a cofounder: 'Go on vacation together'

In the world of startups, the strength of the cofounder relationship can be as crucial as the business idea itself. Daniela Amodei, cofounder of Anthropic, emphasizes this point, having transitioned from OpenAI alongside her brother, Dario, to create a highly sought-after AI enterprise. During a recent session at the Stanford Graduate School of Business, Amodei shared her unconventional approach to selecting a cofounder. "If you can't share a hotel room, that's a red flag," she remarked, highlighting the importance of interpersonal dynamics in startup success. Her own experience with her brother, who she playfully noted she used to steal toys from, reflects a long history of navigating conflicts and collaboration. Amodei's standout advice is to take a vacation together before embarking on a business journey. This experience can expose various relationship dynamics, from coordinating travel plans to sharing living space. She suggests that if, after the trip, both parties still enjoy each other's company, it’s a positive sign for their potential partnership. Conversely, if one finds themselves needing a break from the trip, Amodei warns that it might indicate a mismatch. Clear alignment on visions and principles is essential. She challenged attendees to visualize their startup's mission independently; if both cofounders end up with drastically different drawings, it could signal deeper issues. "If you're imagining a unicorn and your partner sees a platypus, it’s a recipe for disaster," she cautioned, underscoring the necessity of shared goals in a successful partnership.