Energy Startups

Starke Energy provides an integrated technical and financial platform for local smart energy systems, enabling building owners, tenants, network operators, and energy providers to trade energy and optimize local storage to reduce costs and improve flexibility.

2 investors

SSNF develops precision nanoscale manufacturing equipment using projection-based two-photon polymerization for high-throughput fabrication of complex sub-micron structures. The company targets inertial confinement fusion energy applications and aims to enable industrial-scale production of fusion capsules.

2 investors

Stellaria develops an advanced molten salt reactor (AMR-MSR), the Stellarium, a fast-neutron liquid-core nuclear reactor that renews 100% of its fuel during operation and burns long-lived high-activity waste. It targets industrial sites such as petrochemical plants, mines, and datacenters, providing decarbonized electricity, e-fuels, and high-temperature steam.

2 investors

Stepwise develops smart load management technology that enables homeowners to add electric appliances like EV chargers, heat pumps, and hot tubs without panel upgrades. The company serves residential customers in the U.S. seeking affordable home electrification solutions.

2 investors

Strataphy offers PrimeLoop, an underground geothermal cooling system for industrial and data-center use, using proprietary technology intended to lower electricity costs, capital expenditure, surface footprint, and water consumption. The company targets energy-intensive industry, including AI data centers, with a cooling-as-a-service model.

2 investors

Summit Nanotech develops an integrated Direct Lithium Extraction (DLE) platform called denaLi, combining a proprietary multi-column system, its eLivate sorbent, and predictive multi-physics modeling to extract lithium from brine with low water use and high recovery. It serves mining, oil & gas, and battery industries, with testing hubs in Denver, USA and Santiago, Chile.

2 investors

SUN Mobility provides swappable battery systems for electric vehicles using a pay-as-you-go model that separates the battery from the vehicle. Its battery-swapping technology targets shared mobility and aims to address EV adoption barriers such as high upfront costs, range anxiety, and long refueling times.

2 investors

Sundata provides a solar panel management platform that monitors performance and detects faults across residential solar installations. The platform serves housing corporations, solar installers, and energy providers with centralized dashboards for asset management, customer service, and maintenance operations.

2 investors

SunDrive is a solar technology company developing methods to lower the cost of high-efficiency solar cells while improving their performance and sustainability by using more abundant materials. It builds unique chemistries (photoresist, pretreatment, plating) alongside equipment design and automation to scale novel processes into industrial solar cell production.

2 investors

Hexxen is a full-service agency offering web design, full-stack development, SEO, and marketing services. It serves businesses and organizations across industries including legal, home services, healthcare, fintech, government, franchise, and manufacturing.

2 investors

SunGreen makes nanoengineered electrodes, porous transport layers and stacks using its NanoFuzeX platform, which fuses catalyst into a porous metal substrate without a polymer binder or platinum-group metals. It sells finished electrodes and stacks, licenses its technology and stack designs to manufacturers, and offers toll manufacturing and materials testing, with green hydrogen (AEM electrolysis) as its initial market and applications across other electrochemical sectors.

2 investors

SRS provides advisory, education, and technical support services for Commercial Property Assessed Clean Energy (C-PACE) financing, helping contractors, building owners, and mortgage holders reach consensus on energy-efficiency retrofit projects. Its offerings include contractor training, technical support tools, and project financial documentation aimed at accelerating C-PACE market adoption.

2 investors

Sustainable Bitcoin Protocol provides tokenized instruments (SBP Tokens) tied to independently audited energy verification data for Bitcoin mining facilities. The company targets professional clients and eligible counterparties in the sustainable Bitcoin and crypto sector.

2 investors

Sweetch Energy develops INOD nanotechnology to convert osmotic energy — the salinity difference between fresh and saltwater — into continuous carbon-free electricity. Its technology targets applications such as grid-scale renewable power, off-grid coastal communities, desalination and wastewater plants, and industrial sites with saline effluents.

2 investors

Swell Energy provides residential solar generation and home battery storage, and networks together customers' systems into virtual power plants in partnership with US utilities. It offers Compass, an energy control platform that monitors, optimizes, and monetizes home energy systems, and helps homeowners access rebates and financing.

2 investors

Switchee provides smart thermostats, connected sensors and a data platform that give social landlords real-time insight into home conditions to detect mould, reduce fuel poverty, support decarbonisation and meet compliance obligations. Its products serve UK social housing providers, with an Open API that integrates with housing management systems and property maintenance platforms.

2 investors

Sympheny provides a software platform that models and optimises multi-energy systems—covering electricity, heat, cooling, gas, hydrogen, storage and mobility—using a deterministic mixed-integer linear optimisation engine to compare technology and supply scenarios on cost and CO₂. It serves engineering and consulting teams, utilities, public-sector planners and industrial site developers planning energy systems from single buildings to city-wide districts.

2 investors

Sympower operates a platform providing demand response and energy flexibility services that help balance national electricity grids across European markets. It enables businesses to optimize energy usage and earn revenue while supporting the energy transition.

2 investors

T1 Energy develops domestic manufacturing and supply chains for solar and battery energy products in the United States. It focuses on building advanced manufacturing capacity to provide scalable, low-cost energy.

2 investors

Talusag produces modular, containerized green ammonia systems for local production near the point of use, serving agriculture, mining, and maritime sectors. The company's technology stabilizes costs and supply certainty for essential raw materials using power, water, and air inputs.

2 investors

Tampnet operates a high-capacity communication network combining subsea fiber, 4G/5G LTE, and line-of-sight systems to provide low-latency, high-bandwidth connectivity for offshore and onshore energy assets. It serves more than 350 fixed and mobile energy installations globally, connecting data, people, and operational facilities from site to shore.

2 investors

Tantalus provides grid modernization technology for electric utilities, centered on a modular platform that delivers data interoperability across metering devices, substations, distribution circuits, and distributed energy resources from multiple vendors. It also offers a suite of connected devices, serving over 320 utility partners in their transition to a data-centric distribution grid.

2 investors

Tap Electric offers an EV charging app that helps drivers find, compare and pay for public charging across the UK and Europe, with tools like Price Intel and Map Intel plus an optional charge card. It also provides a free charger management platform with AI-powered energy management for charger owners, installers, operators, councils, workplaces, retail and fleets.

2 investors

Tau Motors develops a software-defined power conversion platform spanning motors, inverters and controls for electrified systems.

2 investors