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The new face of Cleantech innovation

1.2k technology startup entrepreneurs trained
1.2b Dollars Raised
3K clean economy jobs

OVERVIEW

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.

Blog

Join Us April-16-18 CTO Webinar Briefings for 2018 Accelerator

by Cleantech Open

HAVE A STARTUP IDEA THAT HAS YOU DREAMING OF THE NASDAQ? 

Join us to learn how Cleantech Open accelerates cleantech startups. Hear about our valuable mentorship...

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Cleantech Startups and Mentors Generate Excitement for 2018 Cleantech Open Accelerator

by Malayah Redmond

Greentown Labs Global Center for Cleantech Innovation, Somerville, MA---March 22, 2018


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Global Forum 2018 Highlights

by Jessica Smothermom

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Cleantech Open Announces Winners of 2017 National Accelerator, Global Ideas Competition, and Global Cleantech Innovation Programme

by Emily Lundberg

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