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.


Cleantech Open Alumni Make an Impact in 2015

by Jane Richards

As we approach the end of 2015, its time to reflect on the successes over the past year for our Cleantech Open West alumni. It's certainly been a good one!

Two of our...

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More Cleantech Winners in the Pacific Northwest

by Chris Bradbury

The Pacific Northwest Regional Showcase, which is the final local event, was held in Seattle this year. Congratulations to all our Semi-finalists! Months of hard...

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Cleantech Innovation Awarded at our 2015 Western Region Showcase

by Jane Richards

Congratulations to all our Western Region Semi-finalists! After their hard work in our accelerator program, it was time to showcase their innovations and celebrate...

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Green Build in Pleasanton

by Kim Chase

A day after Earth Day, the planet was still on the minds of sustainable startup hopefuls attending the Cleantech Open West's Green Build event hosted by Zoho...

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