Founded in 2011, it has grown into the world's largest climatetech and energy incubator, with locations in Somerville, Massachusetts and Houston, Texas. The scale is impressive: 200+ current startups, 625+ supported since founding, with members collectively creating 16,500+ jobs and raising $9.6B+. Over 100 startups joined in 2025 alone.
Greentown operates on a membership model — providing space,...
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