Energy Startups

Decom Engineering designs proprietary mechanical cutting tools, including the patented C1 Chopsaw and TRACS systems, for precision cold-cutting of subsea structures such as conductors, pipelines, risers, and mooring chains. It provides integrated subsea cutting services to offshore and decommissioning clients across six continents.

1 investor

Deep Casing Tools develops well construction and completion technologies for the global energy sector, enabling operators to reduce drilling time, costs, and carbon emissions across well life cycle operations.

1 investor

The Metals Company is developing polymetallic nodules on the seafloor as a source of base metals such as nickel, cobalt, copper and manganese for batteries and energy-transition infrastructure. It also processes these into battery-grade chemicals, copper cathode, and feedstock for manganese alloys and steel, serving energy, defense, manufacturing and infrastructure markets.

1 investor

Deep Isolation Nuclear, Inc. is a company whose stock trades on the OTCQB under the ticker DBHL. The page shown is an investor relations section listing SEC filings, quarterly results, and stock information.

1 investor

Deep Infar provides monitoring and inspection solutions for oil and energy, water management, aquaculture, emergency response, and environmental monitoring applications.

1 investor

DeepIQ applies machine learning and analytics to industrial production data to identify inefficiencies, predict bottlenecks, and recommend ways to optimize resource use and improve production performance. The offering ties into a company's KPIs to support operational decision-making.

1 investor

Deep Ocean Group provides full lifecycle subsea and ocean services — including survey, project management, engineering, maintenance, and recycling — across the renewables, oil and gas, ocean minerals, and ocean services industries. The company focuses on remote and unmanned operations, digitalization, and reducing carbon emissions in the energy sector.

1 investor

Deetken Impact is a Canadian impact investing firm focused on delivering returns while creating social and environmental impact in the Americas, with emphasis on Latin America and the Caribbean. The firm invests in businesses promoting entrepreneurship, expanding access to basic services, and strengthening climate resilience.

1 investor

Delair builds long-range professional drones and mission-planning software for inspecting and mapping linear infrastructure such as electric power transmission and distribution lines. Its systems, used by asset managers and subcontractors including French power operator RTE, integrate with data analytics platforms to assess infrastructure condition and support maintenance planning.

1 investor

Delta Oil is an Egyptian waste oil management company that collects used cooking oil from households, shops, and food-and-beverage businesses through pickup services and collection points, paying suppliers in exchange. The collected oil is supplied as feedstock to biodiesel manufacturers, supporting a circular economy model.

1 investor

Delta is an electricity generation company operating power stations, including the Vales Point Power Station in Australia. It focuses on power generation with an emphasis on environmental practice, sustainable development, and community relationships.

1 investor

Delta Utilities is a natural gas utility company that provides safe and reliable natural gas service to residential and business customers in Louisiana and Mississippi for heating, cooking, hot water, and emergency backup power.

1 investor

DENS develops and produces the Hydrozine generator along with modular, scalable battery systems, including mobile, stationary, and integrated battery solutions for clean power generation. Its systems serve applications such as construction, events, EV charging, water pumps, and bridging or increasing grid connections.

1 investor

Deployable Energy designs and manufactures nuclear microreactors intended for scalable, rapid deployment across diverse applications including remote operations and maritime platforms. The company produces the Unity™ microreactor, a 1 MWe nuclear battery engineered for manufacturability and reliability using standard fuels and processes.

1 investor

Depotcharge operates a Europe-wide marketplace and platform connecting depot operators with electric truck fleets, letting depot owners monetize unused charging capacity while fleet operators find, book and pay for OCPP-compatible charging points along their routes. It serves commercial logistics and haulage companies, offering access management, automated billing and RFID-based charging across a shared network.

1 investor

DerekNet develops software solutions for oil and gas operators, providing virtual flow metering through machine learning models and production measurement management. The company offers NeuroNet for building data-driven virtual meters and DerekSuite for production measurement, allocation, and accounting across the full hydrocarbon supply chain.

1 investor

Deutelio develops fusion energy technology, centered on its proprietary Polomac plasma confinement approach intended to improve efficiency in fusion reactors. The company positions its research as a route toward commercial fusion power and Net Zero emissions goals.

1 investor

Deuterium Energetics develops energy technology solutions, though specific product details are not provided on the team page.

1 investor

DevelopX is a digital consulting company that helps traditional businesses and their leadership adopt digital strategies and capabilities. The firm combines strategy, technology, and implementation expertise to build, scale, and transform digital business models.

1 investor

DevEngine is a clean energy infrastructure company providing financing and development services for sustainable energy transition projects. The firm brings together experienced operators, developers, and financiers to scale renewable energy and related infrastructure assets.

1 investor

Dexma is an energy intelligence software platform that makes building energy consumption visible, measurable, and manageable for organizations. Founded in Barcelona, it serves 10,000+ organizations across more than 35 countries and is now part of Spacewell, a Nemetschek Group company.

1 investor

DG Fuels produces synthetic, low-emission aviation and diesel fuel from renewable hydrogen and biogenic feedstock, designed as a drop-in replacement that works with existing aircraft, locomotives, and trucks without new engines or hydrogen infrastructure. Its process achieves high carbon utilization efficiency to deliver fuel with negative lifecycle greenhouse gas emissions.

1 investor

Dhemax provides technology and consulting for fleet electrification, including a charge management system (CMS), a charging app with roaming integration, and preventive/corrective maintenance for EV chargers. It serves companies and transport operators (public transit, last-mile delivery, and collective transport fleets) across markets such as Spain, Portugal, Mexico, Chile, Colombia, Uruguay, and Panama.

1 investor

Digasgroup converts diesel engines in vehicles and locomotives to run on dual-fuel (diesel and gaseous fuel), targeting fleet operators in the logistics and transportation sectors across Europe.

1 investor