Mike Greenfield is the Co-Founder and CEO of Change Research, a data-driven research firm. See portfolio and contact routes.
Mike Greenfield is the Co-Founder and CEO of Change Research, a data-driven research firm, and previously served as the first data scientist at PayPal and LinkedIn before founding four companies including TeamRankings[2][6]. As an angel investor with 24 recorded investments, he focuses on pre-seed and seed stages in sectors such as parenting, local services, analytics, and AI, primarily within the San Francisco Bay Area[2][4]. His typical check sizes vary across funding rounds, and he frequently co-invests alongside partners like James Currier and Jeff Clavier rather than acting solely as a lead[2][4]. Notable portfolio companies include Literably, CareGuide, Babylist, and Fieldbook, which reflect his interest in data-enabled solutions for families and education[3][4]. Greenfield distinguishes himself as a “data geek” and entrepreneur who leverages his statistical background to evaluate startups, though no specific public writing or distinctive investment manifesto is cited in available sources[1][2].
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