Nineteen climatetech startups joined our community in Q1 2025, working on technologies including building-envelope retrofitting, EV chargers powered by local buildings, and treatment for low-concentration methane emissions.
We’re thrilled to support these groundbreaking climatetech startups—let us introduce you!
Agriculture
Agrilab Technologies offers compost-aeration and heat-recovery (CAHR) products in modular platforms. (Greentown Boston)
Buildings
Highland Park Technologies has developed a novel kit-of-parts approach to building-envelope retrofits utilizing automated manufacturing and bio-based components. (Greentown Boston)
Thola provides an on-demand marketplace for commercial-building sustainability and safety management, with a mission to decarbonize old buildings. Thola is a Greentown alum that rejoined the community this quarter as part of the ACCEL Year 3 cohort! (Greentown Boston)
QEA Tech conducts precise, data-driven building-envelope audits using patented AI software, drones, and thermography. (Greentown Boston)
Electricity
Respire Energy, an ACCEL Year 3 cohort member, is redefining energy storage with a safe, low-cost, and long-duration metal-air battery designed for microgrids. Built with non-flammable and earth-abundant materials, it delivers eight-plus hours of reliable energy storage and backup power. (Greentown Boston)
RotorVault is commercializing cost-competitive and sustainable energy-storage and load-following solutions for grid-scale and commercial applications. (Greentown Houston)
Manufacturing
Andros Innovations, an ACCEL Year 3 participant, has developed a revolutionary reactor that produces ammonia more cheaply, cleanly, and safely than traditional methods do. (Greentown Boston)
ATOM-X’s advanced electrochemical technologies produce green methanol for applications including marine shipping and industrial chemicals. (Greentown Boston)
Demia’s platform provides secure, audit-grade data infrastructure for carbon-intensity reporting, emissions tracking, and environmental certification. (Greentown Boston)
FAST Metals has developed a hydrometallurgical-recovery process capable of extracting iron, aluminum, scandium, titanium, and other rare-earth elements from industrial tailings such as bauxite residue—also known as red mud—which is produced as a waste byproduct in the primary extraction of aluminum. The startup is participating in Year 3 of ACCEL. (Greentown Boston)
Orien Energy is developing an innovative sorption heat pump to recover waste heat in dryer exhaust. (Greentown Boston)
PLASENE offers a platform that converts plastic waste into liquid fuel and low-carbon hydrogen by leveraging proprietary catalysts and modular, scalable, pre-engineered units. PLASENE is part of the ACCEL Year 3 cohort. (Greentown Houston)
RepAir Carbon’s fully electric, zero-heat carbon-removal technology consumes minimal energy, operates without liquids or solvents, and produces no hazardous materials or waste—ensuring complete safety and environmental sustainability. (Greentown Houston)
Tato Labs, an ACCEL Year 3 cohort member, is developing scalable, innovative, bioplastic products and packaging solutions that leverage potato starch, protect and preserve the natural ecosystem, and minimize plastic waste. (Greentown Boston)
Resiliency + Adaptation
Anvil Capture Systems develops scalable carbon-dioxide removal technology using proprietary low-energy reactors and abundant, cost-effective feedstock to permanently mineralize CO2. (Greentown Boston)
Concept Loop, a project of Innova8e Inc., is dedicated to repurposing low-value post-industrial and post-consumer plastic waste into sustainable building materials. (Greentown Houston)
GeoFuels produces hydrogen by utilizing baseload geothermal power and methane pyrolysis. (Greentown Houston)
Resolute Methane treats low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design. (Greentown Boston)
Transportation
it’s electric’s Level-2 EV chargers connect behind-the-meter to draw spare electrical supply from adjacent buildings, allowing for installation at zero cost to property owners or cities and revenue-sharing with building owners. (Greentown Boston)