Energy Startups

Sweet Atoms produces biomass-derived carbon materials and advanced coatings for energy storage, environmental filtration, and biomedical applications. The company manufactures high-performance carbons and specialty materials designed for lithium-ion batteries, sodium-ion batteries, supercapacitors, and wearable electronics.

1 investor

SwellGen appears to be developing water or power solutions for people living on the coast, based on its outreach to coastal residents about how they currently access water and electricity. The page does not describe a specific product.

1 investor

GreenSun sells solar water heating systems, home biogas systems, water treatment solutions, and aquaponics equipment in Belize, with a focus on sustainable energy use.

1 investor

Swimsol engineers and deploys floating and rooftop solar power systems for resorts and island communities, primarily in the Maldives and Indian Ocean regions. The company specializes in heavy-duty marine floating solar installations designed for extreme tropical climates.

1 investor

Swish provides turnkey EV charging stations for businesses, handling site survey, installation, grid connection, maintenance, and supervision. It offers robust OCPP-compatible charging hardware plus SwiGo, a supervision and fleet management platform that centralizes real-time monitoring, billing, and access control for sectors such as heavy vehicles, last mile, workplace, hospitality, retail, and public sector.

1 investor

Switchd is a UK subscription service that automatically switches households to the best available energy tariff, including green deals, for a monthly membership fee. It continuously monitors the market and switches customers whenever a better deal appears, and takes no commissions from energy suppliers.

1 investor

Switchee provides smart thermostats, IoT sensors, and a data platform that gives social landlords real-time insight into home conditions to detect mould, reduce fuel poverty, and meet compliance obligations such as Awaab's Law. It serves social housing providers, primarily in the UK, offering resident engagement tools and an Open API that integrates with housing management systems.

1 investor

Switchgrid provides an API that aggregates electricity meter data from major French utility providers (Linky, EDF, GDF Suez, Gazpar) and exposes it via programmatic interfaces. The platform serves renewable energy companies, energy consultants, and utilities seeking to optimize installations, manage grid flexibility, and analyze energy consumption.

1 investor

Swobbee operates battery swapping stations for rental batteries used in light electric vehicles, and works on recycling and reuse technologies for different battery types. The company focuses on reducing the environmental impact of batteries through shared, swappable infrastructure.

1 investor

Swordfish Energy operates in upstream oil and gas, focusing on asset acquisition, development, and operations. The company serves oil and gas producers and investors seeking to identify and develop reserves, leveraging geoscience and engineering expertise.

1 investor

SWTCH provides EV charging solutions for buildings that leverage existing electrical infrastructure, enabling cost-effective charging deployment and support for growing EV adoption in the built environment.

1 investor

SYCLEF is an international group specializing in the installation and maintenance of commercial and industrial refrigeration and air-conditioning systems, serving retail chains, logistics platforms, and the food-processing industry. It provides energy-efficient cooling and refrigeration solutions using natural refrigerants (NH3, CO2, propane), heat recovery, and remote monitoring across 11 countries.

1 investor

Sympower operates a machine learning-powered platform that connects, aggregates, optimises, and trades energy flexibility from assets such as battery storage (BESS) and demand response, offering balancing responsible party (BRP) solutions. It serves asset owners and energy market participants across European countries, positioning itself as an independent flexibility services provider.

1 investor

Synaptec develops sensor technology and solutions for the power sector. The company combines technical expertise in fundamental research and product development to address challenges in power system operations.

1 investor

Synergen Met operates a team focused on PFAS (per- and polyfluoroalkyl substances) treatment and destruction, leveraging expertise in plasma pyrolysis, water treatment, and thermodynamic modeling for environmental remediation.

1 investor

Synergy Fuels develops clean energy technologies, including converting landfill waste into fuel and improving energy efficiency. The company presents a portfolio of patented, zero-emissions, zero-landfill energy solutions aimed at addressing global energy needs.

1 investor

Synvertec develops technology to integrate renewable energy and distributed energy resources into electricity grids while maintaining grid stability. The Israeli company serves grid operators and inverter manufacturers seeking to support higher levels of renewable energy deployment.

1 investor

Syso develops software to optimize the performance of renewable energy and storage assets, helping asset owners maximize revenue and accelerate grid decarbonization. The company serves renewable energy and storage operators.

1 investor

1 investor

Taaleri Renewable Energy's investment portfolio page listing solar PV, onshore wind, and battery energy storage (BESS) projects across Europe, the USA, and the Middle East, managed through its SolarWind and Wind Power funds. It is the portfolio listing of an infrastructure investment manager rather than an operating company site.

1 investor

Tactical Edge Systems builds deployable power and communications hardware for remote and infrastructure-denied environments, including tethered relay towers, mesh networking, and on-demand hydrogen fuel. Its systems are aimed at governments, defense primes, and military operators, and have been validated through NATO and U.S. defense programs.

1 investor

TaDa analyzes household energy consumption data from smart meters to provide granular monitoring of individual appliances and home energy usage. The company disaggregates energy data to help homeowners understand and manage their consumption patterns.

1 investor

Tadweer supports Abu Dhabi's waste and resource management sector by developing circular economy solutions that convert waste into energy and resources. The company operates a portfolio of specialized companies and partnerships across the waste value chain, including collection, recycling, and advanced treatment.

1 investor

Takafuji is a Japanese engineering company established in 1989 that provides plant construction and maintenance, including work on plant and environmental facilities, and as a group has expanded into renewable energy, steel, painting, forestry, and food/agriculture businesses. It also operates a geothermal-based agricultural heat-exchange system for large greenhouses and serves clients in the industrial and infrastructure sectors.

1 investor