in

97 Best Clean Energy Companies and Startups in the UK

This post contains affiliate links. Affiliate disclosure: As an Amazon Associate, we may earn commissions from qualifying purchases from Amazon.com and other Amazon websites.

This article showcases some of the most popular players operating in the Clean Energy space. Our analysts selected these companies because they excel in one of the following categories:

  • Innovation
    • Innovative ideas
    • Innovative route to market
    • Innovative product
  • Growth
    • Exceptional growth
    • Exceptional growth strategy
  • Market Position
    • Market domination
    • Market leader
    • Strong market competitor

Data sourced from Crunchbase and SEMRush.

This list may include both state and private ventures providing the most value within the Clean Energy industry.

Table of Contents show

Top Clean Energy Companies


Green Star Energy

Green Star Energy supplies electricity, gas and renewable energy at competitive prices.

Crunchbase | Website | Twitter | Facebook | Linkedin


ITM Power

ITM Power designs and manufactures Hydrogen Energy Systems for Energy Storage and Clean Fuel production.

Crunchbase | Website | Twitter | Facebook | Linkedin


Green Energy Options

Green Energy Options designs and produces in-home energy displays, online energy services, and mobile applications.

Crunchbase | Website | Twitter | Facebook | Linkedin


Ultra Electronics

Ultra Electronics is a global defense, security, transport, and energy company developing vehicle systems, power systems, and sonar systems.

Crunchbase | Website | Twitter | Facebook | Linkedin


Intelligent Energy

Intelligent Energy is a clean power systems company offering fuel cell and hydrogen generation technologies.

Crunchbase | Website | Twitter | Facebook | Linkedin


H2GO Power

H2GO Power develops safe and low-cost hydrogen production and storage technologies.

Crunchbase | Website | Twitter | Facebook | Linkedin


Green Business Watch

Web startup connecting UK consumers to accredited, local, renewable energy installers.

Crunchbase | Website | Twitter | Facebook | Linkedin


Jablite

Jablite are the marketing supplier of expanded polystyrene (EPS) products in the UK.

Crunchbase | Website | Twitter | Facebook | Linkedin


Carbon Trust

Carbon Trust is to accelerate the move to a low carbon economy, by working with organisations to reduce carbon emissions now and develop.

Crunchbase | Website | Twitter | Facebook | Linkedin


MyUtilityGenius

27, works for www.myutilitygenius.co.uk, convinced that small actions make the difference to save our Planet!

Crunchbase | Website | Twitter | Facebook | Linkedin


Genius Hub

Genius Hub is a clever little device that will take over the running of your heating at home.

Crunchbase | Website | Twitter | Facebook | Linkedin


Verditek

Verditek focused on clean technology sectors including next generation solar panel technology, liquid gas absorption.

Crunchbase | Website | Twitter | Facebook | Linkedin


Q2i Group

Blockchain Interoperability – Complex Transactions Monetised – Blockchain Agnostic Platform for Innovation – Q2iD – ID Control

Crunchbase | Website | Twitter | Facebook | Linkedin


Dulas

Dulas is a renewable energy installer and consultancy, specializing in the wind, solar, and hydro sectors.

Crunchbase | Website | Twitter | Facebook | Linkedin


Ignis Energy

Ignis Energy specializes in the generation of renewable energy from sustainable sourced timber.

Crunchbase | Website | Twitter | Facebook | Linkedin


Star Domestic Cleaners

Star Domestic Cleaners is a small cleantech contractor located in London.

Crunchbase | Website | Twitter | Facebook | Linkedin


Bramble Energy

Bramble Energy is an innovator energy technology company that designs and manufactures high-performance, low-cost, and fuel cell stack

Crunchbase | Website | Twitter | Facebook | Linkedin


SGMA

SGMA specializes in coatings & advanced materials using Sol-gel process and develops sustainable solutions for today’s global problems.

Crunchbase | Website | Twitter | Facebook | Linkedin


Helpthemove

Helpthemove is a utility management software.

Crunchbase | Website | Twitter | Facebook | Linkedin


Carnot

Carnot is a developer of hydrogen engine used to reduce the fuel consumption and zero CO2 emissions.

Crunchbase | Website | Twitter | Facebook | Linkedin


The World Refining Association

The World Refining Association facilitates knowledge sharing & nurturing of business partnerships within the oil and gas sector.

Crunchbase | Website | Twitter | Facebook | Linkedin


MOF Technologies

Nanomaterials for a low carbon world

Crunchbase | Website | Twitter | Facebook | Linkedin


SEaB Energy

SEaB Energy has patented a micro anaerobic digestion system for onsite and in-building conversion of organics to energy, water, & fertiliser

Crunchbase | Website | Twitter | Facebook | Linkedin


UrbanChain

Blockchain, AI, Renewables, Distributed Energy Management System, Peer-to-Peer Exchange System, Local Energy Market, Virtual Power Plants

Crunchbase | Website | Twitter | Facebook | Linkedin


Rochem Technical Services eUROPE

Rochem provides gas turbine and process compressor cleaning technologies and cleaning chemicals.

Crunchbase | Website | Twitter | Facebook | Linkedin


Ventive

Ventive creates healthy internal environments. Pioneers of Passive Ventilation with Heat Recovery

Crunchbase | Website | Twitter | Facebook | Linkedin


Earth Capital

EC is a global private equity investment manager totally focused on Sustainable Development within the climate change nexus.

Crunchbase | Website | Twitter | Facebook | Linkedin


Carbon Analytics

Carbon Analytics transforms a company’s accounting data into a highly visual, actionable carbon footprint analysis.

Crunchbase | Website | Twitter | Facebook | Linkedin


Gotwind.org

Gotwind was originally founded with the purpose of sharing experience in the design.

Crunchbase | Website | Twitter | Facebook | Linkedin


Witt Energy

Witt Limited has developed a technology called the WITT which converts motional energy into electricity Motional energy

Crunchbase | Website | Twitter | Facebook | Linkedin


Sustainable Marine Energy

Sustainable Marine Energy develops a deployment platform for the tidal energy industry.

Crunchbase | Website | Twitter | Facebook | Linkedin


GEV Wind Power

GEV Wind Power offers wind turbine maintenance service.

Crunchbase | Website | Twitter | Facebook | Linkedin


GrowUp Urban Farms

Growing sustainable, high-quality salad leaves in a completely controlled environment for the retail and wholesale market

Crunchbase | Website | Twitter | Facebook | Linkedin


The Good Heat

The Good Heat Company has been intelligently designing and installing renewable energy systems in South Devon since 2009.

Crunchbase | Website | Twitter | Facebook | Linkedin


Solaris Offgrid

Provide sustainable energy in low income communities.

Crunchbase | Website | Twitter | Facebook | Linkedin


CORE-POWER (UK) Ltd

The marine Molten Salt Reactor (m-MSR) can power zero emission shipping and be a game changer for transport and industry.

Crunchbase | Website | Twitter | Facebook | Linkedin


Future Planet Capital

Future Planet Capital is the world’s foremost global innovation investment platform.

Crunchbase | Website | Twitter | Facebook | Linkedin


BuffaloGrid

BuffaloGrid is removing barriers for internet adoption and connecting the next billion.

Crunchbase | Website | Twitter | Facebook | Linkedin


Electron

Electron is accelerating the energy industry’s transition to Net Zero by making granular, market-based interactions possible.

Crunchbase | Website | Twitter | Facebook | Linkedin


Quimera Energy Efficiency

Energy Efficiency, ESCO, Energy Saving, Energy Service

Crunchbase | Website | Twitter | Facebook | Linkedin


3POWER ENERGY GROUP

3Power Energy Group is a sustainable energy producer focused on providing global wind, solar and hydro solutions.

Crunchbase | Website | Twitter | Facebook | Linkedin


Cambridge Clean Energy Ltd.

Revolutionizing the way energy is delivered to emerging markets. Clean-Tech firm focused on innovation and distributed energy as a service

Crunchbase | Website | Twitter | Facebook | Linkedin


ARROE

Work from anywhere with ARROE’s battery management app and our portable charging solution for mobile workers.

Crunchbase | Website | Twitter | Facebook | Linkedin


Ichthion

Ichthion engaged in Development of cutting-edge technology to restore the ocean environment.

Crunchbase | Website | Twitter | Facebook | Linkedin


Mandulis Energy

Develops renewable energy projects in emerging markets

Crunchbase | Website | Twitter | Facebook | Linkedin


E24

E24 provides fully integrated end-to-end, modular and inter-connectable renewable energy solutions.

Crunchbase | Website | Twitter | Facebook | Linkedin


Mobile Power Ltd

Mobile Power provides clean, affordable energy to the off-grid market in Africa.

Crunchbase | Website | Twitter | Facebook | Linkedin


Demand Logic

Demand Logic is an online energy efficiency system that analyzes data from building management systems.

Crunchbase | Website | Twitter | Facebook | Linkedin


Ozo Innovations

Clean Solutions for a Growing World

Crunchbase | Website | Twitter | Facebook | Linkedin


Tamar Energy

Tamar Energy is a clean energy company focused on producing energy from organic waste matter.

Crunchbase | Website | Twitter | Facebook | Linkedin


EC-OG

EC-OG is a developer of subsea power hub technology designed to generate, store, and supply remote electrical power.

Crunchbase | Website | Twitter | Facebook | Linkedin


Firefly Clean Energy

Silent Hybrid Power Generators for Construction, Events, Broadcast, Festivals, Aid, Commercial & Domestic.

Crunchbase | Website | Twitter | Facebook | Linkedin


Eksagon Group Ltd

Advanced materials technology research, development and commercialisation.

Crunchbase | Website | Twitter | Facebook | Linkedin


Urban Wind Assets

Urban Wind Assets built and operating with a few still in the late stages of construction and connection.

Crunchbase | Website | Twitter | Facebook | Linkedin


RE Hydrogen

RE Hydrogen is develop simple products in the area of gas cleaning, gas compression and hydrogen production.

Crunchbase | Website | Twitter | Facebook | Linkedin


Global Renewables

GLOBAL RENEWABLE LIMITED is a renewables and environment company based out of 19 OAKWOOD DRIVE OAKWOOD DRIVE, BILLERICAY, ESSEX, United King

Crunchbase | Website | Twitter | Facebook | Linkedin


NGenTec

NGenTec designs low, medium speed, and direct drive permanent magnet generators for MW-scale wind turbines.

Crunchbase | Website | Twitter | Facebook | Linkedin


Green Hydrogen

Green Hydrogen Systems and Solutions

Crunchbase | Website | Twitter | Facebook | Linkedin


Flossonic

Flossonic is a U.K.-based provider of a clinically-proven toothbrush that flosses teeth during a normal brushing cycle.

Crunchbase | Website | Twitter | Facebook | Linkedin


Green Investment Bank

Green Investment Bank was created to invest in green projects on commercial terms and mobilise other private sector capital.

Crunchbase | Website | Twitter | Facebook | Linkedin


Waste2ES

Imagine the power to create value from food waste

Crunchbase | Website | Twitter | Facebook | Linkedin


Altroleum

Software for the energy transition

Crunchbase | Website | Twitter | Facebook | Linkedin


Ignite Power

Ignite Power is Pan-African developer and financier of safe clean energy solutions.

Crunchbase | Website | Twitter | Facebook | Linkedin


Green Energy Group

Green Energy Group (GEG) is headquartered in London/ UK and was founded in 2008.

Crunchbase | Website | Twitter | Facebook | Linkedin


H2 Energy

Our systems and solutions are an eco-friendly fuel and power supply designed to empower a cleaner, greener and a more sustainable world

Crunchbase | Website | Twitter | Facebook | Linkedin


International Power

International Power is an multinational electricity generation company.

Crunchbase | Website | Twitter | Facebook | Linkedin


Us Solar Fund

US Solar Fund (USF) is a renewable energy fund that aims to provide investors with attractive, sustainable dividends.

Crunchbase | Website | Twitter | Facebook | Linkedin


Energeo

Energeo creates energy-focused data products that outline current energy performance and future potential.

Crunchbase | Website | Twitter | Facebook | Linkedin


H2 INDUSTRIES

A hydrogen solutions and clean energy company

Crunchbase | Website | Twitter | Facebook | Linkedin


Alkane Energy

Alkane Energy operates distributed flexible ‘gas to power’​ generation plants.

Crunchbase | Website | Twitter | Facebook | Linkedin


FutureFuel Technology

FutureFuel Technology is building the UK’s largest off-grid renewable cryptocurrency mining company

Crunchbase | Website | Twitter | Facebook | Linkedin


Suresense Technologies

Suresense Technologies creates energy efficient technology for the energy intensive industrial sector.

Crunchbase | Website | Twitter | Facebook | Linkedin


Aquamarine Power

Aquamarine Power is a wave energy company developing a hydro-electric wave energy converter called Oyster.

Crunchbase | Website | Twitter | Facebook | Linkedin


Cleantech Region Impact Group Limited

Supporting Climate impact companies & ecosystems. With business, financing & networks.

Crunchbase | Website | Twitter | Facebook | Linkedin


CoreOne

The world’s first connected, autonomous solar water heater.

Crunchbase | Website | Twitter | Facebook | Linkedin


Senergy Innovations

Senergy Innovations is a smart solar thermal panels designer and manufacturer.

Crunchbase | Website | Twitter | Facebook | Linkedin


Blue Sky Bio

Blue Sky Bio is UK government backed clean-tech R&D firm.

Crunchbase | Website | Twitter | Facebook | Linkedin


Global CleanTech Summit

Events and information

Crunchbase | Website | Twitter | Facebook | Linkedin


Legasea

Environmental Oil & Gas service company with a focus on the Circular Economy for Subsea Production Systems and Controls.

Crunchbase | Website | Twitter | Facebook | Linkedin


Assertio Office Cleaning Company London

Office & contract commercial cleaning company based in London, UK.

Crunchbase | Website | Twitter | Facebook | Linkedin


HyDIME

HyDIME is an Innovate UK funded project that uses an environmentally friendly form of hydrogen as a fuel for a commercial ferry.

Crunchbase | Website | Twitter | Facebook | Linkedin


Pest-Away Total Care Solutions Ltd

Pest-Away Total Care Solutions Ltd. is one of the best pest removal services in UK for domestic as well as commercial sector.

Crunchbase | Website | Twitter | Facebook | Linkedin


AVA Global

Interim Management & Executive Search

Crunchbase | Website | Twitter | Facebook | Linkedin


Renergy Solutions

Renergy Solutions is a renewable energy company that provides a solution to produce clean and efficient energy.

Crunchbase | Website | Twitter | Facebook | Linkedin


Seajacks

Seajacks owns and operates self-propelled jack-up vessels that safely and efficiently install and maintain offshore wind farms worldwide.

Crunchbase | Website | Twitter | Facebook | Linkedin


Water Hygiene Systems

Water Hygiene Systems is a long established commitment to quality with excellent products and superior service

Crunchbase | Website | Twitter | Facebook | Linkedin


Kinnotech

Kinnotech Innovators of a solar lamp to reduce carbon emissions in off grid areas.

Crunchbase | Website | Twitter | Facebook | Linkedin


SDnC Ltd

SDnC, is a private start-up engineering company focused on the development of energy storage solutions.

Crunchbase | Website | Twitter | Facebook | Linkedin


The Department of Energy & Climate Change (DECC)

Department of Energy & Climate Change works to make sure that the United Kingdom has secure, clean, and affordable energy supplies.

Crunchbase | Website | Twitter | Facebook | Linkedin


Sunny Britain

Sunny Britain offers financial services for individuals who wish to invest in a renewable energy system.

Crunchbase | Website | Twitter | Facebook | Linkedin


Biomass Power

Biomass Power designs a gasification and waste recycling process for the production of clean energy.

Crunchbase | Website | Twitter | Facebook | Linkedin


Progressive Energy

Progressive Energy is a project development company that develops clean energy projects.

Crunchbase | Website | Twitter | Facebook | Linkedin


BioGen Power

BioGen Power develops, builds, and operates gasification energy recovery facilities (ERFs) in the United Kingdom.

Crunchbase | Website | Twitter | Facebook | Linkedin


Trusted Cloud

Trusted Cloud is a startup, software-based research and technology company based in London. Founder of ResearchDirect mobile platform.

Crunchbase | Website | Twitter | Facebook | Linkedin


Chillwind

Chillwind is a manufacturer of meteorological masts.

Crunchbase | Website | Twitter | Facebook | Linkedin


Energy Centric

Energy Centric is providing energy conservation consultancy services.

Crunchbase | Website | Twitter | Facebook | Linkedin


Jassoc

Jassoc is providing energy conservation consultancy services in Bristol.

Crunchbase | Website | Twitter | Facebook | Linkedin


49 Top Sharing Economy Companies and Startups in the UK

19 Best & Fastest Growing Text Analytics Companies and Startups in the UK