Since 2005 Cleantech Open (CTO) has trained over 1200 early-stage clean technology startup entrepreneurs through its annual business accelerator. Seventy percent 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 BLOG

Cleantech Week Speaker Highlights

by Cleantech Open


Register for Cleantech Week Today!

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Register for Cleantech Week Today!

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Cleantech Week SPEAKER HIGHLIGHT: Ryan Popple, Proterra President and CEO

by Cleantech Open

Popple_22a3.jpgOn Thursday, February 9th, 2017, during Cleantech Week’s anchor Global Forum award celebration, Proterra President and CEO Ryan Popple will speak about the future...

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Spotlight on Cleantech Open's Work in the Water Sector

by Cleantech Open

We’ve probably all heard stories about people, mostly women, walking miles to gather water for their daily needs—often putting themselves in danger of attack by...

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New Year Message from CTO Executive Director Ian Foraker

by Cleantech Open

Cleantech (Open) at the tipping point

By many accounts, cleantech is at the tipping point.  Wind and solar have already become the most economical source of...

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