Greentown Labs Member Milestones — November 2023

Our impressive group of 200+ startups is always hard at work scaling its climatetech solutions! Check out their latest accomplishments below.

Interested in engaging with or joining our community of climatetech startups? Learn about how you can take action with our members or apply for startup membership!


  • rStream received a $1.25M grant from the U.S. Department of Energy to continue its work developing an artificial intelligence program to sort discarded materials.
  • Aeromine received a $1.1M grant from the Danish Energy Agency’s Energy Technology Development and Demonstration Program to test its bladeless wind-harvesting tech.
  • Sublime Systems was approved for five-year tax increment financing valued at $351K by the City of Holyoke, MA, and the state Economic Assistance Coordinating Council approved tax credits of $1M+ for the startup to open a low-carbon cement plant that would bring about 70 jobs to the region.