Index Ventures’ Jahanvi Sardana shares the truth about TAM and what founders should focus on instead

Index Ventures partner Jahanvi Sardana advises early-stage founders to prioritize product-market fit and market creation, rather than solely focusing on pre-defined Total Addressable Market (TAM). She highlights that significant opportunities exist in developing "invisible" markets, citing examples like Google and Airbnb, and categorizes TAM into known, emerging, and new markets. Sardana emphasizes that investors prioritize a founder's deep market understanding, unique insights, and ability to unlock supply and change consumer behavior, ultimately evaluating the founder's ambition and customer comprehension over rigid market metrics.

Analysis

A perspective from Index Ventures partner Jahanvi Sardana suggests a strategic shift for evaluating early-stage companies, prioritizing founder insight and market creation over traditional Total Addressable Market (TAM) analysis. Sardana posits that many of the most successful technology firms, including Google (GOOGL), Microsoft (MSFT), and Amazon (AMZN), emerged by creating 'invisible markets' that were non-existent at their inception. This framework categorizes opportunities into known, emerging, and invisible markets, with the latter presenting the highest risk but also the most significant potential for disruption. The case of Airbnb (ABNB), which Index Ventures initially passed on due to a perceived small TAM, serves as a key cautionary example; Airbnb succeeded by unlocking new inventory and fundamentally altering consumer travel behavior. The current major technological wave identified is artificial intelligence, where the emphasis for founders and investors should be on achieving product-market fit to capitalize on this shift. Ultimately, the view presented is that a founder's unique understanding of their customer and their ambition, as reflected in their market narrative, are more critical evaluation metrics than static, third-party industry reports.

Key Decisions for Investors

• When evaluating early-stage ventures, especially in emerging fields like AI, prioritize the qualitative assessment of the founding team's unique insights and ambition over rigid adherence to pre-defined TAM metrics.
• For investments in platform or marketplace models, valuation frameworks should incorporate the potential for creating new supply and inducing behavioral change, using the Airbnb case as a historical precedent for under-appreciated market expansion.