41+ Best UK Clean Energy Startups & Companies | Best Clean Energy Companies Award 2021

Clean Energy is big business in the UK. We have selected the top 41 Clean Energy companies across the size spectrum to showcase. These startups and companies are all taking different approaches to innovating the Clean Energy industry, that diversity of innovation is what makes the UK so great. 

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

Innovation

Growth

Management

Societal impact

The best Clean Energy startups and firms in the UK

We have profiled the top 41 Clean Energy startups, companies and firms in the UK. This list is in no particular order, all of the companies showcased here are exceptional companies, well worth following. 

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CORE POWER (UK) Ltd

Advanced atomic technologies can be a game changer for heavy transport and industry.

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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.

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Clim8 Invest

Clim8 Invest provides an app that allows individuals to invest in industries that work towards fighting climate change.

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Future Planet Capital

Future Planet is the impact-led, global VC firm built to invest in growth companies from the world's top universities

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H2GO Power

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

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Bramble Energy

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

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SEaB Energy

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

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Electron

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

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Carbon Analytics

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

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Carnot

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

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Ichthion

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

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Solaris Offgrid

Provide sustainable energy in low income communities.

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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

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Quimera Energy Efficiency

Energy Efficiency, ESCO, Energy Saving, Energy Service

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GrowUp Farms

We’re turning food production on its head to make way better food, that doesn’t cost the earth.

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Mandulis Energy

Develops renewable energy projects in emerging markets

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Ventive

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

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Q2i Group

Blockchain Interoperability - Complex Transactions Monetised - Blockchain Agnostic Platform - Q2iD - ID Control - Q2iPay

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Demand Logic

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

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E24

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

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Tamar Energy

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

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Urban Wind Assets

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

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Earth Capital

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

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PF Nexus

Renewable energy & infrastructure deal origination platform

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Altroleum

Software for the energy transition

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Ignite Power

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

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Natural Capital Partners

Natural Capital Partners creates solutions that delivers positive impacts for the environment and society.

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ALP Technologies

ALP Technologies focuses on developing renewable energy technologies for the developing world.

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Verditek

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

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International Power

International Power is an multinational electricity generation company.

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AVA Global

Interim Management & Executive Search

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MyUtilityGenius

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

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Global CleanTech Summit

Events and information

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H2 Bulletin

News and Analysis

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Us Solar Fund

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

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Cleantech Region Impact Group Limited

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

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CoreOne

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

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RHC IMZADI Hydrogen Consulting

RHC IMZADI is a specialist boutique consultancy that assists companies and organisations interested in joining the Energy Transition.

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Star Domestic Cleaners

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

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Assertio Office Cleaning Company London

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

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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.

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