If you have any questions, please check out our application FAQs here.


We don't limit ourselves by location. Our accelerator operates across the US and the globe.

All 50 states are represented in our accelerator.

As the country's largest cleantech-specific accelerator, we work with startups across the United States. We represent a variety of industries and geographies through our annual US-based program.

Think local, work global.

In 2013 through 2018, Cleantech Open formed a partnership with the United Nations International Development Organization (UNIDO), the Global Environment Facility (GEF) to form the Global Cleantech Innovation Programme (GCIP). This program is focused on enhancing both emerging cleantech startups in each country and the local entrepreneurial ecosystem and policy framework.

Read the latest updates on our blog!