Since 2005 Cleantech Open (CTO) has trained over 1200 early-stage clean technology startup entrepreneurs through its annual business accelerator. A majority of CTO alumni have survived the merciless technology startup "valley of death" and gone on to raise $1.2 billion and create over 3,000 clean economy jobs.

CTO's one-of-a-kind innovation ecosystem built over the last 11 years 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.


CTO 2010 Alumnus Arcimoto First to Go Public Using JOBS Act’s Regulation A-IPO

by Emily Lundberg

Since participating in the 2010 Cleantech Open accelerator and ranking as a Western Regional Finalist, Eugene, Oregon-based Arcimoto has spent a decade and millions...

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Cleantech Open 2017 Start-up Accelerator Launches on U.S. East and West coasts

by Cleantech Open

As founder and CEO, Dan Shugar developed NEXTracker into one of the fastest growing cleantech companies in the U.S. Here, at CTO's National Academy West launch at...

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Three Cleantech Trends: Corporate-funded Incubators, Partnerships, and Bold New Investment Models

by Cleantech Open







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Accelerator application deadline extended to May 15 for all regions but the Northeast

by Cleantech Open




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