Energy Startups

f3nice develops and re-engineers advanced materials, focusing on recycling metal scrap into high-quality metal powders and wires (feedstock) for additive manufacturing. It also offers sustainability assessment (LCA), circular design, consulting, and training services to companies adopting additive manufacturing.

1 investor

Face is a building services company that renovates, maintains, and retrofits professional buildings with solar solutions across France. The company focuses on energy transition and decarbonization of commercial real estate.

1 investor

Factor2 Energy develops CO2-based geothermal power technology to generate cleaner energy. The company works on geothermal and subsurface technology aimed at more sustainable power generation.

1 investor

Fanuclear develops lead-bismuth-cooled fast nuclear reactors with a compact, modular design manufactured in factory settings, offering gas-fueled power in the short term with a transition to nuclear energy. Its reactor clusters are designed to power large numbers of homes with a smaller physical footprint than comparable power sites.

1 investor

Farasis Energy develops and manufactures lithium-ion battery cells and systems, offering off-the-shelf and custom battery products plus related R&D services. It serves the e-mobility market with a stated focus on sustainability and compliance with EU battery regulations.

1 investor

Fast Sense builds nanoscale gas sensors embedded in CMOS chips for real-time detection and quantification of hydrogen, methane, CO₂ and other gas mixtures, including compact battery leak detectors, fixed-point hydrogen/VOC detectors and multi-gas analyzers. Its molecular sensing products serve operators in battery energy storage, gas pipelines, refineries, maritime/LNG, biogas digesters and electrical grid/transformer infrastructure.

1 investor

Fast Space develops components for wind turbines, including towers, air bearings, and blades, with custom design capabilities and demonstration samples available. The company also envisions future development of rocket flight systems.

1 investor

Felix provides data and analysis tools for transmission and interconnection planning in the electricity grid, serving developers, utilities, ISOs, and large energy users to accelerate project deployment while maintaining reliability.

1 investor

FENECON develops and supplies electricity storage solutions for residential, commercial, and industrial applications, ranging from single-family homes to large industrial projects. Its open battery storage systems support dynamic electricity tariffs, provider switching, wallbox integration, and PV system expansion.

1 investor

Fenix Energy develops metal fuels and iron recycling technology to reduce global CO2 emissions. The company operates in the cleantech and energy sectors, focusing on alternative fuel innovation and industrial recycling processes.

1 investor

Fermenstation produces ethanol by fermenting and distilling organic rice cultivated on fallow land in Oshu, Iwate Prefecture, using no pesticides or chemical fertilizers. The company operates a zero-waste circular business model, using fermentation residue as cosmetic ingredient and animal feed, with animal waste returned to fields as fertilizer.

1 investor

Fever builds a software platform for energy companies to manage distributed energy resources such as battery storage (BESS) and solar (PV) sites at scale. It serves European energy operators, handling onboarding and operations for distributed energy assets.

1 investor

ProPellet produces wood pellets made from pure, sustainable wood fiber for residential heating, aimed at families seeking clean and reliable home warmth. It was formerly part of FiberBy-Products.com, alongside Coppercoin Garage, which now operates under its own website.

1 investor

Fibersail builds a retrofittable sensor system that detects small internal damage in wind turbine blades, operating independently of the blade OEM. It targets wind farm operators, helping reduce repair costs and increase turbine availability and annual energy production.

1 investor

Field builds renewable energy infrastructure to support the transition to net zero, starting with battery storage systems that store energy for use when demand is highest to create a more reliable and flexible grid.

1 investor

E-Tech manufactures economizers and waste heat recovery products — including boilers and heaters — that help companies reduce energy costs by capturing wasted heat. It builds custom-engineered equipment for new facilities and retrofits, and is the only authorized manufacturer of Kentube Engineered Products economizer replacements.

1 investor

Firma assembles portfolios of grid-connected generation, onsite resources, and flexibility into a single power-purchase agreement to supply clean firm power to data centers and other large loads. Its FirmaOS software models grid physics, reliability, and economics to design supply packages, serving hyperscalers, AI cloud operators, developers, and large industrials across MISO, SPP, and PJM markets.

1 investor

FiveStrata is a lead generation and customer acquisition marketing company that produces exclusive, call-verified residential solar leads and pre-set sales appointments for national, regional, and local clients, and applies the same model to other industries. It handles real-time data verification, TCPA compliance, and lead transfers or appointment setting for clients' sales teams.

1 investor

FlexGen develops an AI-powered platform for the energy sector that helps businesses, municipalities, and communities optimize power grid operations, energy storage, and distribution. The platform supports efficient and sustainable energy management.

1 investor

Flexitricity operates a demand response portfolio and virtual power plant exceeding 1GW in Great Britain, using AI and real-time modelling to optimise flexible energy assets and provide reserve electricity to NESO. It serves industrial and commercial businesses across GB, helping them generate revenue from flexible energy markets.

1 investor

Flexiv develops adaptive industrial robots that combine force control with AI, enabling the robots to sense their environment and automate tasks with human-like dexterity. Its products, including force-sensitive adaptive robots, target industrial automation across various industries.

1 investor

Develops geothermal energy solutions.

1 investor

Flo Energy is an independent electricity retailer in Singapore offering fixed-rate renewable energy plans, Renewable Energy Certificates, solar Power Purchase Agreements, and tenant management solutions for businesses. It provides the FlowSmart dashboard for tracking usage, billing, and payments, and serves customers ranging from small businesses to large enterprises and multi-tenanted properties.

1 investor

Float Energy provides digital twin software for the hydrogen industry, integrating real-time forecasts of power prices, renewable generation, and CO₂ grid intensity to optimize green hydrogen production for lower cost and higher sustainability. Its OPTI-MATE platform is aimed at hydrogen producers.

1 investor