69 Best Clean Technology Startups in Uk to Watch in 2025

The Definitive Seedtable Ranking of Clean Technology Startups in Uk

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 179 start-ups with an aggregate funding of $7.0b. The average funding per company in this subset is $100.8m.

Last update to the database: Feb 18, 2025. See changelog.

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1

Funding Rounds

$2.5m

Money raised

Toast Ale is a London-based brewery using surplus fresh bread to brew beer and dedicating their profits to charities working to create greater efficiency in the food supply system.

3

Funding Rounds

$5.3m

Money raised

Minimum is a carbon tracking and carbon offsetting company

Location:

Key people:

3

Funding Rounds

$60.0m

Money raised

Uncommon, formerly known as Higher Steaks, is a cellular agriculture company based in London, England founded in 2017 by Benjamina Bollag, Stephanie Wallis and David Hay working to develop pork and other meat products using cellular agriculture.

Key people:

7

Funding Rounds

$39.7m

Money raised

EmitWise helps large businesses monitor and reduce their carbon footprints.

5

Funding Rounds

$40.7m

Money raised

Terrestrial Energy is developing molten salt nuclear reactors.

Location:

Key people:

4

Funding Rounds

$95.9m

Money raised

Olio is a London-based sharing company working to solve the problem of food waste and hunger.

Location:

3

Funding Rounds

$10.3m

Money raised

CarbonChain aims to automate the accounting of companies' carbon emissions.

Location:

Key people:

5

Funding Rounds

$9.1m

Money raised

Puraffinity is a company using customized granular media (CGM) to remove pollutants and contaminants from water supplies.

Location:

Key people:

3

Funding Rounds

$29.7m

Money raised

3F BIO is a biotechnology company developing and commercializing sustainable proteins, bioethanol and animal food production technologies. Jim Laird founded 3F Bio at the University of Strathclyde in Glasgow, Scotland in 2015.

Location:

Key people:

5

Funding Rounds

$225.0m

Money raised

A biotechnology company that specialized in the renewable energy sector. It was located in Bedford, Massachusetts and is no longer in operation.

Key people:

5

Funding Rounds

$32.7m

Money raised

PhaseCraft is company that is developing fundamental quantum theory and software for quantum computers.

Location:

Key people:

1

Funding Rounds

$3.0m

Money raised

FashionTech company using Artificial Intelligence for wardrobe management

6

Funding Rounds

$732.4m

Money raised

Ecovadis is an environmental sustainability ratings platform to assess corporate social responsibility and sustainable procurement.

9

Funding Rounds

$138.9m

Money raised

SkySpecs is a company founded in 2012 by Daniel Ellis.

12

Funding Rounds

$187.2m

Money raised

Oxford PV is a London-based developer of perovskite thin-film solar cells.

2

Funding Rounds

$64.0m

Money raised

Circular Economy improves supply chains transparency by verifying responsible sourcing, effective recycling and by attributing CO2 footprint and other impact metrics to materials flows.

Location:

Key people:

1

Funding Rounds

$2.7m

Money raised

Holy Grail is focused on the development of autonomous research systems dedicated to material science and chemistry with the goal of replacing the use of fossil fuels with electro-chemical battery solutions.

6

Funding Rounds

$2.1b

Money raised

Octopus Energy is a company that offers retail electricity and gas supplies, and specializes in sustainable energy.

Location:

Key people:

4

Funding Rounds

$442.0m

Money raised

Arrival is a London based company developing and manufacturing zero-emission, public transportation vehicles.

Location:

Key people:

7

Funding Rounds

$73.0m

Money raised

Addionics is creating next-generation batteries through intelligent 3D battery architecture and engineering.

Location:

Key people:

4

Funding Rounds

$4.9m

Money raised

Pynk is a company that provides a game-changing investment platform that is built for everyday people.

1

Funding Rounds

$15.4m

Money raised

A biotechnology company using microbiology and chemistry to produce consumer goods and industrial products.

1

Funding Rounds

$32.0m

Money raised

Primus Power is an Hayward, California-based zinc bromine flow battery manufacturer.

8

Funding Rounds

$40.6m

Money raised

Dendra Systems is an Oxford-based systems developer providing integrated analytics and planting solutions for large-scale ecosystem restoration.

1

Funding Rounds

$1.2m

Money raised

Bonnet is a company developing an app that acts as one subscription for all EV charging networks.

1

Funding Rounds

$40.0k

Money raised

Aerial Power is a London-based company founded by Ridha Azaiz.

Location:

Key people:

10

Funding Rounds

$182.1m

Money raised

Echion Technologies is a supplier of niobium-based anode materials founded in 2017 by Jean de La Verpillière, Alex Groombridge, Adam Boies and Michael De Volder.

1

Funding Rounds

$37.9m

Money raised

Worn Again is a United Kingdom-based fast fashion company founded in 2012.

5

Funding Rounds

$27.1m

Money raised

Qio Technologies Limited is a company providing digital twin solutions for industries, including their QiO Foresight Platform which unites energy, maintenance, production, and performance applications.

6

Funding Rounds

$465.8m

Money raised

Highview Power is a company that provides CRYOBattery which delivers a clean and long-duration energy storage to enable a 100% renewable energy future.

3

Funding Rounds

$10.8m

Money raised

Climate data intelligence platform for businesses.

3

Funding Rounds

$66.0m

Money raised

Mori manufactures an all-natural protective layer to slow down the spoiling process of food.

5

Funding Rounds

$3.7m

Money raised

Perceptual Robotics is an industrial automation company based in Bristol.

Location:

Key people:

1

Funding Rounds

$21.0m

Money raised

Intelligent Energy is a fuel cell engineering company focused on the development of its fuel cell technologies.

2

Funding Rounds

$11.1m

Money raised

Brill Power Limited is a company that develops intelligent battery management systems and technology to enhance the lifetime, performance and safety of lithium-ion battery packs.

Location:

Key people:

7

Funding Rounds

$109.4m

Money raised

Cervest is building an AI platform to augment human decisions on Climate Security for global assets.

4

Funding Rounds

$38.8m

Money raised

Winnow Solutions is a company founded in 2013.

11

Funding Rounds

$12.1m

Money raised

Electron is an Entech company that is aiding the transition to Net Zero. Electron offers transformative solutions that are available to all energy market participants.

Location:

Key people:

7

Funding Rounds

$358.0m

Money raised

Operator of an online car auction platform designed to facilitate the sale of used cars.

6

Funding Rounds

$35.5m

Money raised

Greyparrot use deep learning and computer vision to accurately classify different types of waste materials.

Location:

Key people:

1

Funding Rounds

$4.5m

Money raised

Pledge is a software development company providing tools and infrastructure to automate the delivery of climate solutions.

5

Funding Rounds

$291.7m

Money raised

Battery Resourcers is a company that offers a closed-loop cathode material supply chain solution

4

Funding Rounds

$32.6m

Money raised

Humanising Autonomy is building the global standard for human machine interactions.

Location:

Key people:

9

Funding Rounds

$140.6m

Money raised

Carbon Clean Solutions is a London-based carbon capture and storage company developing CO2 separation technology for industrial and gas treating applications.

Location:

Key people:

10

Funding Rounds

$17.1m

Money raised

Piclo is a software company that is building smart energy for the future.

Location:

Key people:

3

Funding Rounds

$40.6m

Money raised

Developer of an energy storage technology designed to fight climate change using carbon dioxide (CO2) to accelerate the transition to renewable energy. The company's technology is based on a thermodynamic transformation of CO2 a closed-loop process to store energy and make renewable power dispatchable.

Key people:

5

Funding Rounds

$6.1m

Money raised

Industrial Phycology Limited is a Bristol-based developers of a system to harness algae and harvest the nutrients.

Location:

Key people:

4

Funding Rounds

$9.8m

Money raised

Aceleron is a clean technology company that aims to empower global communities by increasing access to energy storage solutions for its customers.

Location:

Key people:

3

Funding Rounds

$11.1m

Money raised

Deep Branch is a carbon dioxide recycling company that is using microorganisms to convert clean CO2 into quality products.

2

Funding Rounds

$29.3m

Money raised

Hybrid solar technology generating combined heat and power.

Location:

Key people:

1

Funding Rounds

$4.1m

Money raised

Lightfoot is an Exeter-based clean technology engineering company.

Key people:

2

Funding Rounds

$18.0m

Money raised

Sefaira is a London-based software company developing software for energy efficiency and management in buildings.

Location:

Key people:

10

Funding Rounds

$7.0m

Money raised

Chaddenwych Services Limited is a London-based software and blockchain technology company founded in 2015.

Location:

Key people:

2

Funding Rounds

$12.6m

Money raised

Provider of sustainable on-demand laundry and cleaning services for everyone.

Location:

Key people:

3

Funding Rounds

$45.0m

Money raised

Notpla is a plastic-free packaging solutions provider founded in 2014 by Pierre Paslier.

Location:

Key people:

5

Funding Rounds

$167.5m

Money raised

Malta Inc is a company storing renewable energy in molten salt founded by X.

5

Funding Rounds

$40.0m

Money raised

GeoSpock is a database technology company based in Cambridge, UK and with international offices in Singapore and Tokyo. The company was founded by Dr Steve Marsh

Key people:

3

Funding Rounds

$40.3m

Money raised

AI-designed enzyme producer to transform plastic waste into valuable resources.

Location:

Key people:

7

Funding Rounds

$24.5m

Money raised

Invinity Energy Systems is a vanadium flow battery company.

3

Funding Rounds

$23.4m

Money raised

Recycleye Ltd is an AI-automated waste management founded in 2019.

4

Funding Rounds

$2.5m

Money raised

The Company has recently released electric turbofans optimized for static thrust and VTOL/STOL.

$100.0k

Money raised

Altroleum is a company that offers a data platform for the energy transition, daily hydrogen cost assessments and more.

Location:

Key people:

1

Funding Rounds

$13.7m

Money raised

Anaphite is a dry-coating EV battery technology developer founded in 2016 by Alexander Hewitt.

Location:

Key people:

2

Funding Rounds

$10.4m

Money raised

An automated factory producing insect protein for farm animals

1

Funding Rounds

$17.6m

Money raised

Hummingbird is a drone and satellite enabled imagery analytics business for precision agriculture.

Location:

2

Funding Rounds

$5.1m

Money raised

Listing of items billable to a patient being treated at a hospital in the united states

4

Funding Rounds

$57.7m

Money raised

Again provides supply chain infrastructure for circular packaging.

1

Funding Rounds

$110.0m

Money raised

Tala is a London-based company founded in 2015.

1

Funding Rounds

$2.0m

Money raised

ObjectBox is a company founded in 2015 by Vivien Dollinger.

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