Energy Startups

C1 Connections develops the C1 Wedge Connection, a wedge-based fastener system for connecting wind turbines to monopile foundations as an alternative to bolted flange connections. It supplies fasteners and tools and offers design and fabrication support for offshore and onshore wind turbine interfaces.

1 investor

The Center for Climate and Energy Solutions (C2ES) is a nonprofit organization focused on climate policy, working to accelerate the transition to net-zero greenhouse gas emissions through reports, briefs, and policy recommendations. It engages foundations, governments, individuals, and businesses to advance pragmatic climate action, primarily in the United States.

1 investor

CABAN Systems provides energy-as-a-service and battery energy storage systems, including infrastructure, operations, and maintenance offerings delivered through turnkey models with no upfront investment. It serves critical infrastructure operators across telecommunications, data centers, commercial/industrial, and healthcare sectors, and offers a cloud-based software platform for monitoring and controlling energy infrastructure.

1 investor

Cable provides battery-backed electricity plans for Australian small businesses, funding and owning the battery and trading it on wholesale markets to charge when prices are low and discharge when high. It offers a flat, inflation-indexed per-kWh rate, currently serving small and medium businesses in Sydney, Australia.

1 investor

Cactos provides battery energy storage systems designed and manufactured in Finland, paired with its Cactos Spine software that automatically optimizes operation for cost savings and efficient energy use. It serves business customers such as logistics centers, EV charging stations, farms, and industrial facilities, offering backup power during outages and storage of self-produced solar energy.

1 investor

Cadenza Innovation develops a patented lithium-ion cell packaging architecture and battery energy storage systems focused on safety, energy density, and low cost. Its products serve utility-scale, commercial and industrial, residential, telecom, and IT backup-power markets.

1 investor

Cadmus is a consulting and technical services firm that provides solutions in areas such as water systems, energy, public health, infrastructure, governance, financial services, and disaster preparedness. It offers AI-enabled tools including Cadmus Logic.AI for decision support and Cadmus Nexus, an energy forecasting and data modeling platform for utilities, serving primarily government and private-sector clients.

1 investor

Caeli Wind operates a marketplace that connects German landowners — including industrial businesses and investors — with wind farm project developers, running feasibility and site analyses, tenders, and legal/permitting support to lease land for wind energy. It offers free site assessments and manages the full leasing process for property owners across Germany.

1 investor

Caithness Energy develops, builds, and manages power generation projects across the United States, primarily combined cycle and peaker plants. It acts as developer, asset manager, construction manager, and operations manager for these energy facilities.

1 investor

Caltec designs patented surface jet pump and compact separation technologies used in the oil and gas industry to boost production and reduce emissions. Its passive systems have no moving parts and can be retrofitted to existing facilities to improve efficiency.

1 investor

Calumix is a nanotechnology company that produces advanced carbon-coated aluminum current collectors for lithium-ion batteries, offered as a drop-in solution to improve rate performance and calendar life while reducing stack height. It serves North American battery cell makers and also applies its coating materials platform to other uses such as free chlorine sensing.

1 investor

CDT is a research and innovation centre focused on the conception, development, and testing of advanced materials, with applications spanning electronics, communications, green energy, and life sciences. It operates as the European Research and Innovation Centre of Sumitomo Chemical.

1 investor

Candela designs and builds electric hydrofoil vessels that use significantly less energy than traditional boats, serving both private and public transportation markets. The company develops batteries, motors, and control systems to eliminate fossil fuels from marine transportation.

1 investor

Candi provides end-to-end commercial and industrial solar installations with zero-upfront financing, system design, construction, and real-time performance monitoring for businesses across India and South Africa. It serves industries such as manufacturing plants, office buildings, logistics hubs, and agricultural sites.

1 investor

Candid provides AI software that embeds into active FEL/FEED engineering projects to compress pre-construction phases and help owner-operators and EPCs reach final investment decisions (FID) faster. It automates spec parsing and document work, flags cost, schedule, and scope risks, and validates designs for firms building data centers and energy infrastructure.

1 investor

Cape Electric is an electrical products distributor and solutions provider offering hardware, LED lighting, EV charging, and integration services (CESI). It serves electrical/construction, industrial, utility, communications, and residential markets across Missouri, Illinois, Kentucky, Arkansas, Alabama, and Tennessee.

1 investor

CapeOmega is an energy infrastructure company that develops low carbon maritime infrastructure and supports decarbonization of the energy value chain, including new fuels such as ammonia and hydrogen and carbon management. Originally the largest private infrastructure owner on the Norwegian Continental Shelf, it focuses on asset and portfolio management, financing, and investment in energy transition infrastructure.

1 investor

CaPow provides a power delivery system that charges robots while they operate, removing the need for charging downtime and reducing floor space requirements. The technology targets robotics and automation operators seeking to keep fleets running at full throughput.

1 investor

capSpire is a consulting and technology firm that provides CTRM/ETRM (commodity and energy trade and risk management) services to energy and commodity trading businesses. It serves clients in global markets.

1 investor

Carbic manufactures ultrasonic sensors that attach to pipes to measure fluid flow and detect anomalies in high-throughput systems; the company processes the sensor data using physics models and machine learning to help oil and gas operators, water utilities, and other industrial customers monitor operations, reduce spills, and prevent theft.

1 investor

Carbo Energy builds hybrid non-aqueous redox flow batteries for grid-scale energy storage, designed to complement renewable energy sources with a 40-year lifespan, zero fire risk, and degradation of 0.2% annually. The company serves utilities, datacenters, mining operations, and renewable energy farms across multiple markets including energy trading, backup power, and off-grid operations.

1 investor

theconduit is an AI engine for energy project finance that connects real-time asset data, flexibility markets, and capital flows to structure and route financing for renewable and community energy projects. It serves project sponsors, lenders, CDFIs, and community organisations in the UK, with an open-source graph and connectors plus a proprietary matching engine that also channels project margins into a community-governed adaptation fund.</parameter> <parameter name="founders">

1 investor

Centinel provides AI-driven energy optimization software for commercial real estate properties, delivering cost savings to tenants and revenue to property owners through building efficiency analysis. The platform serves REITs, private equity firms, and major CRE investors across over 2,200 buildings in the United States.

1 investor

Carbonade develops an electrochemical technology that converts CO2 into carbon-based products such as feedstocks for synthetic and sustainable aviation fuels, targeting hard-to-abate sectors like aviation, shipping, chemicals, and metal fabrication. Its catalyst-based system aims for higher energy efficiency and stability in CO2 conversion and can operate with intermittent renewable energy.

1 investor