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Cleantech Open
runs the largest clean technology accelerator program in the world.
2,100+
Technology Startups
4000+
Entrepreneurs Trained
$3B+
Total Dollars Raised
76%
Teams w/BIPOC and/or Women (2024)
business accelerator
Since 2005 Cleantech Open (CTO) has trained over 4,000 entrepreneurs from 2,100+ early-stage clean technology startups through its annual business accelerator.
A majority of CTO alumni surveyed have survived the merciless technology startup “valley of death” and gone on to raise over $3 billion equity, and in recent cohorts, 75%+ of Teams contain members who identify as BIPOC and/or women.
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CTO’s one-of-a-kind innovation ecosystem built over the last decade and a half of programming spans key cleantech innovation hubs in the U.S. and globally.
As a non-profit organization run largely by volunteers, there are many ways to contribute. Join our global network of innovation and together let’s forge a clean and sustainable future.
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