Tim Trefren is an angel investor who previously co-founded and served as CEO of Mixpanel. See sector focus and contact routes.
Tim Trefren is an angel investor who previously co-founded and served as CEO of Mixpanel, a leading product analytics company he built after Y Combinator in 2009, and currently leads Recheck, a climate tech startup focused on solar sales transparency[2][3]. His investment thesis targets early-stage startups addressing climate change, food security, and economic development, with a focus on climate innovation[3]. While specific check sizes and lead/follow behavior are not publicly documented, his background as a founder who raised over $277 million suggests experience with significant capital deployment[3]. Notable portfolio companies include Mixpanel, which achieved over $100 million in annual revenue and a $1.05 billion valuation, and Recheck, his current venture in residential solar verification[3][6]. Trefren holds a computer science degree from Arizona State University and served as a Climate Tech Fellow at On Deck, reflecting his distinctive point of view on climate tech accountability[3][4]. He has not published public writing on investing, but his operational focus on transparency in solar sales distinguishes his approach[3][4].
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