Early-stage science-based ventures (SBVs) require a wide range of intellectual resources and practical know-how to successfully commercialize their technologies. Often SBV founders actively gain this knowledge through advisory relationships providing business and technology guidance. We explore the effects of both business and technology advisors in combination with the founder’s entrepreneurial and technology experience. We measure early-stage success in an SBV using application readiness, a novel concept that encompasses progress in both technology discovery and validation as well as market identification and application. Using hand-collected longitudinal data from 112 emerging science-based ventures associated with American universities, we find that business advisors have a positive impact on application readiness, while technology advisors delay it; and these effects are moderated by the founder’s experience. Remarkably, a small number of advisors can have the same impact as decades of experience. Our article unpacks underexplored mechanisms through which advisors—an often-used policy tool supporting entrepreneurship—are implemented in emerging science-based ventures and makes academic contributions to the literatures on technology commercialization, advisors and human capital.