55 climatetech startups joined our community in the final quarter of 2025, working on technologies ranging from refrigerant-free heat pumps, to recyclable countertops, to geothermal-powered carbon capture.
We’re thrilled to support these groundbreaking climatetech startups—let us introduce you!
Buildings
Bootbox Labs develops the world’s first refrigerant-free heat pump to electrify and decarbonize the HVAC industry. (Greentown Boston)
Candid Intelligence compresses months of pre-construction engineering into hours through an agentic AI system that structures project documents and performs end-to-end tasks, saving up to 50% of engineering time and unlocking 2x more revenue per project. (Greentown Houston)
ClarityCastle designs and manufactures modular, soundproof work pods that replace traditional drywall construction with reusable, low-waste alternatives made from recycled materials. (Greentown Houston)
Electricity
247Solar provides high-temperature, modular solar power with overnight storage—now delivered as a turnkey solution for clean industrial-process heat and baseload renewable electricity, on a power-purchase-agreement basis. (Greentown Boston)
Blykalla is developing next-gen nuclear power with an advanced, lead-cooled small modular reactor. (Greentown Houston)
Dracula Technologies’s LAYER uses organic photovoltaic technology to empower a battery-free future for manufacturers and end users by using ambient indoor light to generate sustainable micro-power for devices. (Greentown Houston)
Dugu Systems’s emissions-free gas turbine delivers clean energy while capturing carbon from a range of fuels. (Greentown Houston)
LAVA’s liquid-based isothermal technology converts heat into power and power into heat at near-perfect efficiency, delivering superior returns with rapid payback. (Greentown Houston)
New Mantle Technologies uses physics and AI to achieve technological breakthroughs in subsurface characterization. (Greentown Boston)
PV Nano Cell advances single-crystal, nano-conductive pastes and inks to lead metallization in solar-cells technologies. (Greentown Boston)
Reblade develops robotics and drones for hard-to-reach or impossible locations to automate the maintenance of wind energy assets—the biggest cost over a turbine’s lifetime. (Greentown Houston)
Sphinx is redefining commodities trading across global energy markets with an advanced platform that combines institutional-grade speed and blockchain transparency. (Greentown Houston)
Voltaware enables utilities to accelerate the energy transition with AI-driven insights from electricity-consumption data. (Greentown Boston)
WattSto Energy manufactures vanadium redox flow batteries, delivering long-duration storage for both grid-scale projects and off-grid microgrids. (Greentown Houston)
Manufacturing
3D Architech’s gel-enabled manufacturing technologies deliver high-efficiency, low-cost components for cooling and energy—helping data centers and clean-energy providers overcome key thermal and energy conversion bottlenecks. (Greentown Boston)
AMPeers delivers advanced, high-temperature superconductors in the U.S. at a fraction of traditional costs. (Greentown Houston)
Biosimo is developing bio-based platform chemicals, pioneering sustainable chemistry for a healthier planet and economy. (Greentown Houston)
Carbion innovates a thermochemical platform that transforms biomass into high-quality graphite for batteries and other critical industries, faster and more affordably than traditional methods. (Greentown Houston)
Catalyxx transforms bioethanol into drop-in, cost-competitive, carbon-negative chemicals, enabling customers to de-risk their supply chains and reduce CO2 emissions without sacrificing profitability, existing infrastructure, or product performance. (Greentown Houston)
Ententia offers purpose-built, generative AI for industry—delivering operational impact with speed and precision. (Greentown Houston)
FLUIDXLAB combines intelligent hardware, orchestration software, and expert services to create integrated solutions that optimize complex fluid operations across industries. (Greentown Houston)
GeoKiln Energy Innovation is pioneering a new way to produce clean hydrogen by manufacturing it directly within the earth—accelerating natural geologic reactions in iron-rich rock formations using precision electrical heating. (Greentown Houston)
ICODOS transforms emissions into value through a point-source carbon capture and methanol synthesis process in a single, modularized system. (Greentown Boston; Carbon to Value Initiative)
Infinite Foundry delivers 3D digital twins for real-time monitoring and optimization of industrial operations. (Greentown Houston)
Lite-1 uses advanced biomanufacturing processes to produce circular colourants for use in food, cosmetics, and textiles. (Greentown Boston; Carbon to Value Initiative)
MagDrive‘s Zero-E magnetic actuation technology eliminates fugitive emissions from industrial valves. (Greentown Houston)
MCatalysis produces low-cost, clean synthetic fuels and chemicals by upcycling waste-carbon resources, such as agricultural residues, plastic waste, and waste-gas streams. (Greentown Houston)
Mission Zero Technologies has developed and internationally deployed an electrified, direct-air carbon capture solution that employs both liquid-adsorption and electrochemical technologies. (Greentown Boston; Carbon to Value Initiative)
Nano-Tech SpA is pioneering advanced, efficient, and circular composite materials for extreme environments—including aerospace, defense, and high-performance automotive applications. (Greentown Houston)
Nobula is reshaping 3D printing with a glass 3D printer that makes shaping transparent glass fast, affordable, and energy efficient. (Greentown Houston)
Nominal builds an essential software stack that accelerates test and operations for hardware teams developing critical technologies, from carbon capture and hydrogen systems to energy storage and industrial electrification. (Greentown Houston)
Pure Blue Tech manufactures reverse-osmosis membranes that resolve both fouling and scaling, reduce chemical and energy use, and lower operating costs for utilities and industry. (Greentown Houston)
Rushnu integrates point-source carbon capture with chemical production, turning salt and CO₂ into chlorine-based chemicals and minerals. (Greentown Boston; Carbon to Value Initiative)
Sora Fuel integrates direct-air capture with direct conversion of the captured carbon into syngas for production of sustainable aviation fuel. (Greentown Boston; Carbon to Value Initiative)
SpiralWave reimagines carbon capture with CaptureBeam, its novel electrolyzer that merges capture, solvent circulation, and regeneration into a single interface. (Greentown Houston)
Sustonable offers sustainable, recyclable surface material with more than 70 percent recycled content, that can be used for wall cladding, flooring, countertops, or other decorative applications. (Greentown Houston)
Timbergrove builds AI and IoT solutions that connect and optimize assets—boosting visibility, safety, and efficiency. (Greentown Houston)
Turnover Labs develops modular electrolyzers that transform raw, industrial CO₂ emissions into chemical building blocks, without capture or purification. (Greentown Boston; Carbon to Value Initiative)
Universal Matter develops a Flash Joule Heating process that converts carbon waste such as end-of-life plastics, tires, or industrial waste into graphene. (Greentown Boston; Carbon to Value Initiative)
Resiliency + Adaptation
AeroNero’s advanced atmospheric water generators use patented deep-tech engineering to produce clean, alkaline, and mineral-rich drinking water directly from the air. (Greentown Houston)
Arbon develops a humidity-swing carbon-capture solution, capturing CO₂ from the air or point-source without heat or pressure. (Greentown Boston; Carbon to Value Initiative)
Cella Mineral Storage develops a subsurface-mineralization technology with integrated software, enabling new ways to sequester CO₂ underground. (Greentown Boston; Carbon to Value Initiative)
Circular Materials leverages the properties of supercritical water to recover valuable metals with an efficiency exceeding 99 percent. (Greentown Houston)
dataVediK combines energy-domain expertise with advanced machine learning and intelligent automation to empower organizations to achieve operational excellence and accelerate their sustainability goals. (Greentown Houston)
Diffraqtion makes revolutionary AI cameras that can build the world’s largest, ultra-high-resolution satellite network for observation at less than 1 percent of the cost of today’s satellites. (Greentown Boston)
ecobrew develops modular, decentralized carbon capture systems that recover and reuse CO₂ directly at the source—making carbon capture profitable and practical for small and mid-scale emitters across fermentation, agriculture, and other industrial processes. (Greentown Houston)
Ocean Visuals delivers sensor systems for real-time detection, verification, and classification of oil and organics in the ocean, including submerged oil. (Greentown Houston)
Octavia Carbon develops a solid-adsorption-based, direct-air carbon capture solution that utilizes geothermal heat. (Greentown Boston; Carbon to Value Initiative)
PooPoof Inc.’s 90-second, spray-walk-away solution breaks down dog waste on-site into soil-safe byproducts with a precision formula, replacing plastic bags and reducing landfill and watershed pollution. (Greentown Boston)
Resonant Thermal Systems use a resonant energy-transfer (RET) system to extract critical minerals from industrial and natural brines without using membranes or grid electricity. (Greentown Houston)
Solar Materials’s patented recycling technology recovers 98 percent of raw materials from silicon solar panels. (Greentown Houston)
Swiss Vault is a software and hardware company with innovative technologies to help organizations manage data for decades, using less space and less energy while boosting sustainably. (Greentown Houston)
Torres Orbital Mining (TOM) develops autonomous excavation systems for extreme environments on Earth and the moon, enabling safe, data-driven resource recovery and laying the groundwork for sustainable off-world industry. (Greentown Houston)
XMTRACE provides a scalable methane-monitoring solution that combines distributed sensing with autonomous response, delivering high-confidence results while reducing the cost and complexity of traditional monitoring approaches. (Greentown Houston)
Transportation
SBD Technologies provides next-generation fleet management for electric vehicles by delivering real-time insights, smart charging, predictive maintenance, and optimized routing to reduce costs and maximize uptime. (Greentown Boston)