Cleantech Startups

Quidnet Energy develops geomechanical energy storage technology that repurposes existing oil, gas, and hydroelectric infrastructure to provide grid-scale, long-duration energy storage. The company serves utilities and grid operators seeking scalable solutions for the energy transition.

5 investors

Rebound Tech develops adaptive cooling infrastructure for industrial facilities dealing with high cooling demand, peak energy charges, and humidity control. Its systems target sectors such as food processing, aquatics, and turbine inlet cooling.

5 investors

Recurve provides an open-source platform that turns utility customer energy data into demand-side and demand-flexibility programs, with tools for planning, segmentation, program delivery, and DER performance measurement and verification. It serves utilities, program implementers, and OEM/DER platforms.

5 investors

REbeing provides data, software, and advisory services for valuing renewable energy projects, managing production volatility, and measuring carbon impact in the clean energy market. Its products include CleanSight, a tool for energy market analysis, PPA procurement, and portfolio management, and CleanTrade, a CFTC-registered transaction platform for as-generated energy, serving corporate buyers, developers, and investors.

5 investors

Revoy builds electric vehicles or electric drivetrain technology. The company is hiring engineering roles focused on mechanical, electrical, and supply chain functions.

5 investors

Alto operates a vertically integrated electric rideshare fleet in the US, running vehicles and W-2 drivers on the Uber platform (Uber Black, Uber XL, UberTeen) while building depot, charging, maintenance, and fleet management infrastructure to support autonomous vehicle operations. It serves the rideshare and autonomous mobility market, currently operating in Los Angeles and Miami.</parameter> <parameter name="hq_country">US

5 investors

R-Zero provides AI software that reduces HVAC energy consumption in buildings by 20-40% using real-time occupancy and air quality data, with no infrastructure changes required. The platform serves facility managers and asset managers across commercial and institutional real estate portfolios.

5 investors

Scanifly is an end-to-end solar design and field operations software platform that pairs with drones to capture site measurements and shading data and produce 3D models, PV system designs, and permit-ready plan sets. It serves residential and commercial solar installers, covering sales estimates, drone-based surveys, design, and installation workflows.

5 investors

Scythe builds the M.52, an autonomous, battery-powered commercial mower with onboard perception technology (Scythe Sight) for landscape maintenance crews. The machine handles mowing tasks to increase crew capacity in the commercial landscaping industry.

5 investors

Senken operates a carbon credit platform that vets and rates projects using its Sustainability Integrity Index, selecting a small fraction of available credits and building portfolios with corporate sustainability buyers. It serves companies purchasing carbon credits and works on a partnership basis rather than self-serve, without holding its own inventory.

5 investors

Sicona develops battery materials, including silicon-based anode materials, through in-house R&D, materials production, and a dedicated battery and materials testing laboratory. It aims to supply high-performance, cost-effective battery materials to support the transition to electrified energy.

5 investors

SiTration develops silicon-based electro-extraction (SEE) and nano-filtration (SNF) technologies that recover metals and critical minerals from mining waste, leachate, and recycled material using electricity and no added chemicals. Its process serves mining, refining, and recycling operators seeking to turn tailings and wastewater into recoverable resources such as rare earth concentrates, copper, and precious metals.

5 investors

Skye develops technology for managing energy and flexibility within industrial processes, drawing on expertise in control systems, industrial automation, and energy market trading. It serves industrial companies seeking to optimize energy use and participate in energy markets.

5 investors

Skyward develops a lightning wildfire prevention system that uses AI to forecast where lightning is most likely to ignite wildfires and releases inert atmospheric materials to reduce cloud-to-ground strikes before fires start. It serves wildfire agencies and fire managers, with a stated focus on North America and British Columbia, Canada.

5 investors

Solestial develops and manufactures radiation-hardened silicon solar power modules for satellites and space applications. The company serves commercial and government customers requiring power solutions for large satellite constellations and space infrastructure.

5 investors

Solstice connects households and businesses to local solar farms through a software platform that qualifies subscribers based on energy needs rather than credit scores, enabling bill savings through solar credits. The company focuses on making clean energy accessible to underserved communities across the United States.

5 investors

SparkMeter provides metering and low-voltage transformer-sensing hardware combined with software for billing, payments, prepaid metering, customer and asset management, and grid management. Its products are designed for minigrid and distribution utility operators, using RF-mesh network communications that work in low-bandwidth internet areas.

5 investors

SpinDrive develops active magnetic bearing (AMB) technology and provides services spanning client-specific AMB system design, parts supply, and commissioning for manufacturers of high-speed machines. It offers a flexible engagement model and proprietary design software, serving customers across industries as an independent AMB service provider.

5 investors

Station A provides software and services that help commercial building owners and portfolio managers evaluate buildings, identify clean energy project opportunities such as onsite solar, and connect with qualified developers and buyers to execute those projects. It serves companies pursuing emissions reduction and clean energy goals across their real estate portfolios.

5 investors

Steady Energy develops the LDR-50, a low-temperature heat reactor based on technology from the Technical Research Centre of Finland. The company commercializes this reactor technology for industrial and environmental applications.

5 investors

Syzygy Plasmonics converts waste biogas and renewable electricity into sustainable aviation fuel using proprietary photocatalytic technology. The company serves airlines and fuel buyers seeking low-carbon alternatives to conventional jet fuel.

5 investors

tado° makes smart thermostats and AI-powered energy management products for home heating systems including radiators, underfloor heating, boilers, and heat pumps, plus dynamic electricity supply based on real-time prices. It serves residential consumers, helping them control room temperatures and reduce heating costs and CO2 emissions.

5 investors

Tandem PV manufactures high-efficiency perovskite-silicon tandem solar panels designed for U.S.-based commercial-scale production, serving electricity demand from AI, electrification, and data infrastructure. The company's panels integrate into existing manufacturing supply chains with higher energy capture than conventional solar technology.

5 investors

Terabase Energy provides cloud-based software and construction automation for utility-scale solar projects, including tools for plant simulation (PlantPredict), construction management (Construct), and SCADA and plant controls. Its products support developers and builders of large-scale solar plants through project development and deployment.

5 investors