Arjun Sethi

Arjun Sethi is best known as a co-founder of Tribe Capital, a venture firm that distinguishes itself by using quantitative, data-driven frameworks to assess product-market fit and make early-stage investment decisions. Within the AdTech and MarTech ecosystem, Tribe Capital has backed companies operating across programmatic infrastructure, identity resolution, measurement, and commerce media — areas that sit at the convergence of data science and advertising technology. Prior to founding Tribe Capital, Sethi held operating and investing roles that gave him hands-on experience scaling consumer and enterprise technology products. He was a partner at Social Capital, the venture firm founded by Chamath Palihapitiya, where he helped develop the firm's analytical investment methodology. Before that, he had operator experience at companies including Yahoo and MessageMe, giving him a product-level understanding of how data flows through digital media systems. Sethi is recognized in venture and AdTech circles for championing a rigorous, metrics-first approach to evaluating startups — particularly around concepts like 'product-market fit score' derived from engagement and retention data. This methodology has influenced how a generation of investors and founders think about growth in data-intensive sectors like programmatic advertising, identity, and measurement.

• B.S., University of Southern California

• Co-founded Tribe Capital, raising multiple funds and establishing a data-driven investment framework influential in Silicon Valley
• Developed and published a quantitative 'product-market fit' scoring methodology widely cited by investors and founders
• Led or participated in investments in multiple AdTech and data infrastructure companies through Tribe Capital
• Previously helped scale investment operations at Social Capital under Chamath Palihapitiya

• Product-Market Fit: A Quantitative Approach (Tribe Capital blog/essay series)