Our 200+ startups never fail to impress us with their hard work and commitment to scaling their climatetech solutions! Check out their latest accomplishments below.

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Funding

• Sublime Systems received a $3M investment from Suffolk Technologies, which also pre-purchased capacity from Sublime’s upcoming low-carbon-cement manufacturing plant.
• Greentown members and alumni Loop CO2, Optigon, Osmoses, and Salient Predictions received a total of $800k from MassVentures’s START Grant Program.
• Greentown alum SparkCharge, which offers charging-as-a-service in an off-grid EV-charging network, announced $30M in funding—$15M in a Series A-1 round and $15M from a venture loan.
• Greentown Go alum InventWood, which creates enhanced wood that’s stronger than steel, raised $15M in the first close of its Series A funding round.
• Greentown Go alum Freshr, developer of sustainable active packaging, closed a seed round with an investment from Diamond Edge Ventures—the CVC arm of Mitsubishi Chemical Group, which the startup connected with via the Greentown Go program it participated in.
• Greentown Go alum Zero Homes received an investment from Exelon, and the two are now working together to integrate Zero Homes’s platform into Exelon’s utility programs.

Partnerships + Deployments

• Sublime Systems announced a purchase from Microsoft of up to 623k tons of cement products—enough to build about 31 football stadiums—marking what it says is the largest-ever advance transaction for clean cement.
• Neuralix demonstrated up to 30 percent energy savings in saltwater-disposal operations through AI-driven pump optimization, in partnership with a leading midstream operator.
• Cemvita achieved key performance milestones for two of its products, FermOil and FermNPK, which provide low-carbon alternative feedstock for Sustainable Aviation Fuel (SAF) and support regenerative agriculture, respectively.
• ACCEL participant Tato Labs partnered with Coach on a marketing activation at Bloomingdale’s featuring custom bio-based bag charms created with its potato-based process.
• Haffner Energy was selected for the first Renewable Energy Valley project, where it will partner on a bio-hydrogen plant that will produce 240 tonnes of mobility-grade hydrogen per year and avoid 2,880 tonnes of CO₂ emissions per year.
• Greentown alum Stepwise announced a strategic partnership and investment from SoPark Corporation, a U.S.-based electronics manufacturer, to manufacture Stepwise’s products in the United States, thereby avoiding tariffs.
• Greentown alum Feon Energy opened its 13,000-square-foot R&D facility in Woburn, MA, where the startup will manufacture its electrolyte for next-generation lithium-ion batteries.
• Greentown alum SparkCharge completed a live demo of its mobile EV-charging tech with Greentown partner Amazon—in an alleyway powered by current Greentown member REON.
• Greentown Go alum ZS2 Technologies announced its Gen 2 magnesium-cement building materials, which are produced domestically using industrial byproduct waste streams.
• Carbon to Value Initiative alum Carbfix received Europe’s first storage permit for onshore, geological CO₂ storage.

Awards + Recognition

• 7Analytics, a startup pioneering high-precision predictive models for floods, won the pitch competition at ClimateTech Connect.
• Reframe Systems, which is building net-zero homes with robotics and microfactories, received the 2025 Ivory Prize for Innovation in Construction & Design.
• AtmoSpark, which develops atmospheric water generation technology, and ConceptLoop, which converts plastic waste into eco-friendly, low-carbon aggregate, were named to the 2025 Rice Alliance Clean Energy Accelerator.
• Greentown alumni Building Envelope Materials and Embue were selected for the fifth edition of The Clean Fight’s Deployment Accelerator, which will focus on decarbonizing multifamily, low-to-moderate-income and affordable housing in New York State. 
• ACCEL alum Carbon Negative Solutions was chosen for Venture for Climatetech’s latest cohort.