Energy Startups

Semikron Danfoss develops power electronics and semiconductor solutions for industrial applications, with a focus on enabling customer decarbonization and advancing circular economy principles. The company is committed to carbon neutrality in its operations by 2030 and embedding sustainability across product development, manufacturing, and supply chain management.

1 investor

SemperPower integrated renewable energy with large-scale battery systems. The company's legacy continues at Return, which builds carbon-free energy infrastructure for Europe.

1 investor

Senergetics develops solutions for asset management and energy efficiency optimization.

1 investor

Senergy Innovations develops sustainable energy and material products, including solar thermal systems for solar hot water (SenerSol) and thermally conductive polymers aimed at low-carbon applications (SenTherm). The company operates in the cleantech and advanced materials space.

1 investor

Global IoT connectivity provider offering a Network-as-a-Service approach for connecting IoT devices at scale.

1 investor

Senpilot develops AI agents designed to transform the utilities sector. The company serves utility companies with artificial intelligence technology.

1 investor

Senscient makes the ELDS laser-based open path gas detector, which uses tuneable lasers and Harmonic Fingerprint processing to detect toxic and flammable gases such as hydrogen sulfide, methane, ammonia, and carbon dioxide while minimizing false alarms. The device includes SimuGas automated self-testing and serves general industry, oil and gas, and utilities markets.

1 investor

SenseHawk offers a map-based, geospatial software platform that manages solar and battery storage projects across development, construction, and operations, replacing spreadsheets and disconnected tools with a single source of truth. It serves solar EPCs and developers managing utility-scale portfolios, with features including drone analytics, thermal inspections, task management, inventory tracking, and an AI copilot for solar data.

1 investor

Sensewaves builds Adaptix Grid, a continuously verified operational network model for electric utilities investing in ADMS and DERMS. It provides operational applications on top of the model, including ADMS readiness, low-voltage visibility, forecasting, DER integration, revenue protection, and distribution planning.

1 investor

Senslytics provides an AI platform that uses explainable machine learning to predict and prevent equipment failures in the oil and gas industry. The platform helps engineers and energy professionals optimize maintenance decisions by identifying root causes and reducing costly unplanned downtime.

1 investor

Senslytics develops AI-based analytics products for the oil and gas industry, focused on interpreting downhole and wireline data such as mudgas logging, corrosion monitoring, and fluid sample contamination. Its tools help estimate reservoir fluid properties and identify asset integrity issues to extend asset run time.

1 investor

Sensmet develops online process analyzers for continuous monitoring and control of liquid samples in industrial applications. The company's patented Micro-Discharge Optical Emission Spectroscopy (µDOES®) technology enables multi-metal analysis of aqueous samples, with critical applications in battery metal monitoring during production and recycling.

1 investor

SensorFlow provides an IoT-based energy management platform for hotels, with sensors and automation for guest rooms that control HVAC, lighting, curtains, and keyless entry while tracking electricity, water, gas, and waste consumption. Its tools help hotel operators cut costs, improve energy efficiency, and report ESG/sustainability metrics.

1 investor

Sentinel develops and operates data centers—primary production and failover facilities totaling over 3 million square feet across the United States—serving Fortune 500 companies and hyperscale cloud, AI, financial services, healthcare, technology, media, and biotechnology sectors.

1 investor

SEOS International provides commercial lighting services including lighting concepts, detailed designs, supply of fixtures, logistics, and on-site installation supervision and commissioning. It works with hospitality and commercial clients such as hotels, resorts, and airports, acting as an outsourced team of lighting experts across their projects.

1 investor

SepFluor is a South African fluorspar producer focused on mining and supplying acid grade and metallurgical grade fluorspar (CaF2), an industrial mineral used in chemical, metallurgical and ceramic processes including refrigerants, aluminium smelting, nuclear power and EV battery electrolytes. The company operates in the mining and critical minerals sector.

1 investor

Sepia Infrastructure develops, finances, and operates large industrial parks and associated low-carbon energy infrastructure to host hyperscale data centres and other energy-intensive operators. It provides turnkey services across Europe covering site selection, permitting, grid connection, energy solutions, and long-term campus operations.

1 investor

SerenySun develops large-scale renewable energy communities in urban and peri-urban areas, using individual and collective self-consumption to share locally produced green electricity among public authorities, businesses, and individuals. Operating in France, it works with local governments, real estate players, and companies to make local green energy accessible to participants who may not have their own solar production.

1 investor

Serimax provides tailored welding solutions including engineering, manual and automatic welding, procedure qualification testing, and welder training for industrial projects. The company offers full-service project delivery with welding, non-destructive examination, and field joint coating services, supported by operational logistics and on-site commissioning.

1 investor

Sesame Sustainability provides a life-cycle assessment platform for evaluating traditional and emerging energy pathways. The platform, built from MIT research, serves industry stakeholders analyzing sustainable energy systems and hydrogen infrastructure.

1 investor

A solar energy company that designs, installs, and monitors solar systems. The company serves residential and commercial clients seeking solar solutions in their region.

1 investor

SESCO designs and manufactures vacuum dehydration systems and instrumentation for industrial applications, including lube oil purifiers for water contamination removal and equipment service/upgrades. The company serves industrial sectors with high water contamination environments and provides on-site and facility-based equipment service and operator training.

1 investor

SET Ventures is a venture capital firm investing in European energy technology companies since 2007, with offices in Amsterdam, Hamburg, London, and Madrid. The firm focuses on supporting early-stage and growth-stage companies working on climate solutions and energy transition.

1 investor

SFC Energy AG manufactures fuel cells, power supplies, and power management systems for clean energy, defense, and industrial applications. The company operates across clean energy solutions, tactical power systems, and semiconductor/laser power supplies from headquarters in Germany.

1 investor