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69 Most Innovative Connecticut Based Energy Companies & Startups

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This article showcases our top picks for the best Connecticut based Energy companies. These startups and companies are taking a variety of approaches to innovating the Energy industry, but are all exceptional companies well worth a follow.

We tried to pick companies across the size spectrum from cutting edge startups to established brands.

We selected these startups and companies for exceptional performance in one of these categories:

  • Innovation
    • Innovative ideas
    • Innovative route to market
    • Innovative product
  • Growth
    • Exceptional growth
    • Exceptional growth strategy
  • Management
  • Societal impact

Top Connecticut Energy Startups

Data sourced from Crunchbase and SemRush.

FuelCell Energy

FuelCell Energy

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FuelCell Energy, Inc. (NASDAQ: FCEL) is an integrated fuel cell company that designs, manufactures, installs, services and operates

Budderfly

Budderfly

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Budderfly is an energy management company with devices that measure and report on all elements of energy use.

Budderfly

Altus Power America

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Altus Power America Management is a leader in private investment in clean energy projects and renewable energy certificates

Budderfly

Triax Technologies

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Triax Technologies delivers a connected IoT worksite platform designed for construction, energy and heavy industrial environments.

Budderfly

Diamond S Shipping

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Diamond S Shipping is an energy shipping company that owns and operates crude and product tankers.

Budderfly

Proton Energy Systems

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Proton Energy Systems is a company that provides hydrogen, nitrogen, and zero air generators to labs, and energy production companies.

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Millbrae Energy

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Millbrae Energy is a developer and producer of oil and gas reserves.

Budderfly

H2Sonics

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H2Sonics manufactures a system of reactors to produce hydrogen and aluminum oxide.

Budderfly

Ameri Energy Group

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Ameri Energy Group is a US based firm engaged in energy-saving products. The company is seeking to raise funding to set up the company.

Budderfly

Eversource Energy

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Eversource transmits and delivers electricity and natural gas for more than 3.6 million electric and natural gas customers.

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Upcycle Technologies

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Upcycle Technologies is a developer of an energy conservation technology used to convert carbon-based waste materials into energy.

Budderfly

Crius Energy

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Crius Energy is an independent energy retailers in the United States, providing electricity, natural gas and solar products.

Budderfly

Starwood Energy Group Global

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Starwood Energy Group is a private investment firm based in Greenwich, CT that specializes in energy infrastructure investments.

Budderfly

Tauriga Sciences

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Tauriga Sciences, Inc. is a diversified company focused on the Triple Bottom Line.

Budderfly

Sun Fund

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Solar Energy – Vertically Integrated

Budderfly

POWWR

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POWWR is The leader in energy managed software solutions and consulting services.

Budderfly

APS Technology

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APS Technology is an oil & energy company that provides vibration management products.

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Pratt & Whitney Power Systems

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PW Power Systems, Inc. (PWPS), formerly Pratt & Whitney® Power Systems and now a subsidiary of Mitsubishi Heavy Industries, Ltd.

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Keter Environmental Services, Inc.

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Keter Environmental Services is an environmental services company providing solid waste management and recycling enhancement services.

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GTherm

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GTherm, Inc. (“GTherm”) is dedicated to the development of environmentally-sound innovations for use in the energy and other markets.

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UIL Holdings

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Connecticut-based power and gas company

Budderfly

Spot On Networks

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Spot On Networks offers tech platforms that provide wireless broadband internet access to residential users in multifamily dwelling units.

Budderfly

Enviro Power

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Enviro Power is an energy-tech company.

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Noble Environmental Power

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Noble Environmental Power is a leading renewable energy company.

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Bolt Technology Corp

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Bolt Technology Corp is supplier of marine seismic energy sources and replacement parts for offshore energy exploration.

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Precision Combustion

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Precision Combustion is a clean energy technology company for developing and manufacturing catalytic reactors & systems.

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Industrial Airflow Dynamics Inc

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IAFD is a specialty company that provides services to the power industry catering to fabric expansion joints surrounding HRSG.

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R&D Dynamics

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R&D Dynamics Corporation is a center for research and the design, development and production of energy efficient, oil-free turbomachinery.

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Petroleum Heat & Power

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Americas 1 local home heating oil and total home comfort services provider.

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Kinsley Power Systems

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Kinsley Power Systems is an oil & energy company specializing in energy solutions.

Budderfly

Iroquois Gas Transmission System

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Iroquois Gas Transmission System is an oil & energy company that operates the natural gas pipeline.

Budderfly

Steven Winter Associates

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Steven Winter Associates is a renewables & environment company offering energy, sustainability, research, and accessibility services.

Budderfly

Star Gas Partners L.P.

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Star Gas Partners is a full-service energy provider specializing in the sale of diesel fuel.

Budderfly

Environmental Energy Services

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Environmental Energy Services is a clean energy company utilizing innovative chemistry and engineering.

Budderfly

Thermaxx Jackets

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Thermaxx Jackets was founded over 25 years ago with a single purpose: to save energy .

Budderfly

Midsun Group

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Midsun is engaged in providing animal outage protection and high voltage insulator cleaning services.

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Tradition Energy

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Tradition Energy is an oil & energy company offering energy consulting services.

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Poseidon Water

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Poseidon Water is a company that assists other organizations to produce clean water for areas lacking a safe supply.

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Preferred Utilities Manufacturing Corporation

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Preferred Utilities Manufacturing Corporation is an engineering company specializing in nuclear outage support and nuclear power facilities.

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TechniArt Inc.

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TechniArt Inc. is focused on developing and marketing products which involve alternative sources of energy.

Budderfly

Greenskies Renewable Energy LLC

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Greenskies Renewable Energy is a renewables & environment company providing solar financing and project implementation services.

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Artis Energy

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Artis Energy Intelligence delivers real-time visibility and insights that save energy, identify operational improvements.

Budderfly

Oak Investment Partners III

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Oak Investment Partners is a multi-stage venture capital firm its focus is on high growth opportunities in Clean Energy.

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Gemma Power Systems

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Gemma Power Systemsis an Engineering, Procurement and Construction company providing solutions for power and renewable energy industry.

Budderfly

Alteris Renewables

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Alteris Renewables is the largest design-build renewable energy company in the Northeast, with more than 25 megawatts installed for over

Budderfly

Automated Building Systems

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Automated Building Systems provides lighting control, reporting, energy, auditing, grant writing, monitoring & system integration services.

Budderfly

USi

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USi provides engineering services and advanced technology products for the electric power industry.

Budderfly

ATR Energy

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ATR Energy is a high-tech exploration and production company that offers oil drilling services.

Budderfly

Destwin Energy Systems

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Destwin Energy Systems deals with cloud-based SaaS solutions, risk management, fuel dealer & energy wholesaler solution for the fuel sector.

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Blake Equipment Company

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Blake Equipment Company is a construction firm providing water and thermal energy solutions, equipment, products and services.

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Connecticut Natural Gas Corp

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Connecticut Natural Gas Corp is a utilities company providing natural gas equipment and services.

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Palm Energy Systems

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Palm Energy Systems is a Innovative Networked Solar Farms where we Live, Work and Play

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Gault

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Gault provides fairfield county homeowners bioheat heating oil, propane, generators, HVAC services.

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Norwich Public Utilities

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Norwich Public Utilities is a municipal utility company providing electricity, natural gas, water, and wastewater services.

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Starion Energy

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Starion Energy is an oil & energy company providing electricity and natural gas supply solutions.

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Earthlight Technologies

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Earthlight is a renewables & environment firm that specializes in solar energy solutions for homes, businesses, and commercial buildings.

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North American Power and Gas

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North American Power and Gas is a supplier of natural gas and electricity.

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Burlington Oil

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Burlington Oil is an oil company.

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Transformative Wave

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Transformative Wave develops catalyst control technologies, eIQ platform to monitor energy consumption & HAVC assets performance solutions.

Budderfly

US Power Generating Company

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US Power Generating Company is an oil & energy company that generates and sells energy.

Budderfly

Inertech

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Our solutions are engineered to increase reliability and lower the total cost of ownership and energy footprint of IT infrastructure.

Budderfly

SunEast Development

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SunEast is a privately held clean energy development and management services company.

Budderfly

Sun-Wind Solutions, LLC

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Solar Panel Installer, Commercial Solar, Residential Solar, Solar Installation Company

Budderfly

MSL Group

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MSL Group handles roof-mounted and ground-mounted solar projects.

Budderfly

Ashe Morris

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Ashe Morris is developing a new technology that controls the temperature by changing the effective heat transfer area itself.

Budderfly

Taylor Energy

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Taylor Energy is an oil and propane supplier company.

Budderfly

AFB Construction Management

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AFB Construction Management specializes in construction management, energy management and facilities management.

Budderfly

Celtic Energy

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Celtic Energy is an energy consulting firm that specializes in energy project management and oversight.

Budderfly

Innovation Fuels

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Innovation Fuels is a biodiesel company developing and operating state-of-the-art biodiesel processing plants in the US.

Written by Mark Smith

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