Energy Startups

Stone Ridge Asset Management is an institutional asset manager that co-invests alongside leading endowments and family offices in differentiated alternative asset classes. The firm sources and structures investment vehicles in opaque markets while applying proprietary data and disciplined risk management.

1 investor

Stormentum designs home energy storage systems with a focus on reducing costs through storage-first architecture, targeting residential adoption of modern energy systems.

1 investor

StreamTECH provides workforce management and operational compliance software for field-based businesses, initially built for oil & gas but expanded to serve multiple industries. The platform handles scheduling, time tracking, compliance reporting, and equipment management with a focus on reducing manual work and improving operational visibility.

1 investor

Stromdao provides consulting services to municipal utilities and distribution network operators to translate technical infrastructure measures into regulated financial planning and governance-ready investment decisions.

1 investor

Subcritical Systems develops accelerator-driven nuclear energy systems that use a particle accelerator to sustain fission in a subcritical core for electrical power generation in the US. The technology is designed to be inherently safe with no criticality potential and cost-competitive with natural gas.

1 investor

THEVA develops and manufactures high-temperature superconductor tape (THEVA Pro-Line) that carries far more current than copper with virtually no losses, aimed at manufacturers of cables, power electronics, industrial drives, and busbars. The German company serves the power, drive, magnet, and manufacturing industries with its own patented production process.

1 investor

Subra develops scalable superconductor solutions aimed at improving energy transmission and infrastructure. The company positions its technology as supporting clean, connected, and carbon-free energy systems.

1 investor

Subsea Global Solutions provides underwater inspection, maintenance, and repair services for the maritime and offshore industries, including hull cleaning and subsea projects using commercial divers and ROV operators. It serves vessel fleets and offshore energy assets through offices across five continents.

1 investor

Summit Ridge Energy is a commercial solar power producer that develops, finances, and operates solar projects across the United States, with a focus on community solar and energy independence. The company serves businesses and communities by providing locally generated solar power while emphasizing U.S.-based manufacturing and supply chains.

1 investor

Summit Lithium develops direct lithium extraction (DLE) technology to produce lithium at lower cost and with reduced environmental impact compared to conventional methods. The company serves battery and energy transition markets with a focus on water efficiency and smaller surface footprints.

1 investor

Sun Exchange finances, designs, installs, insures, and maintains solar systems for schools, farms, retirement homes, nonprofits, and other organisations, which then pay only for the solar energy produced. Founded in 2015, the company operates in South Africa.

1 investor

Radar Solar is an independent directory of companies that install solar panels and heat pumps (aerotermia) across Spain, covering 3,880 companies with dedicated pages for 123 cities. For each company it shows verifiable information such as Google ratings, grant handling, warranties and financing, ranked by a public formula; it does not sell installations or charge companies for placement.

1 investor

Sunaxer develops solar absorber coatings for industrial heat harvesting, using a patented heat treatment that achieves high solar absorptance and low thermal emittance on solar receivers. Its coatings are designed to improve the efficiency of concentrating solar collectors for industrial applications.

1 investor

Sunbird Énergie designs and delivers solar energy installations, guiding clients through the technical decisions of their solar projects. It serves businesses undertaking energy projects.

1 investor

SunCommon is a solar installation and energy company serving homeowners and communities in Vermont and New York to help address the climate crisis. Operating as a certified B Corp and Benefit Corporation, the company combines commercial solar deployment with local community engagement and climate advocacy.

1 investor

Sundyne manufactures integrally geared centrifugal pumps and compressors, sealless magnetic drive pumps, and diaphragm gas compressors. It serves companies in the energy, chemical, petrochemical, and industrial processing markets worldwide.

1 investor

SunFarmer provides solar energy systems for hospitals, schools, businesses, and farms in developing countries. It focuses on delivering reliable and affordable electricity to support healthcare, education, economic development, and agriculture.

1 investor

SunFarmor offers a turnkey solution for rural communities to develop and operate utility-scale solar farms, providing energy independence to farmers and landowners. The company emerged from solving public acceptance challenges for large-scale solar projects in the rural Midwest.

1 investor

SunFund provides financing solutions that enable Filipino homeowners and businesses to install rooftop solar through flexible long-term payment plans rather than large upfront costs. The company partners with solar installation providers and manufacturers to deliver accessible clean energy solutions.

1 investor

Sungage Financial provides online loans for residential solar energy and storage projects, offering financing to homeowners through its network of solar installer partners. Founded in 2011, the U.S. company specializes in solar-specific consumer lending.

1 investor

Sunman develops ultra-light solar panels. The page requires JavaScript and returned no usable content beyond a tagline describing the company as a maker of ultra-light solar products.

1 investor

Sunna Design designs, develops, and manufactures in France autonomous, connected solar-powered street lighting for public lighting of roads, parks, and urban, peri-urban, rural, and remote areas. Founded in 2011, it serves municipalities and territories, with over 160,000 solar solutions deployed across 60 countries.

1 investor

Sunnova was a residential solar and energy storage company whose assets and operations were acquired through a Chapter 11 court-supervised sale; it has ceased independent operations, with SunStrong Management now servicing most in-service customer accounts. The company operated in the U.S. residential renewable-energy market, managing solar leases, loans, and power-purchase agreements.

1 investor

Sun's Electric provides solar and electrical installation services using premium products and focusing on sustainability across Oregon, Washington, California, and Belize.

1 investor