69 Best Climate Tech Green Tech Startups in Uk to Watch in 2025

The Definitive Seedtable Ranking of Climate Tech Green Tech 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 223 start-ups with an aggregate funding of $7.3b. The average funding per company in this subset is $105.4m.

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

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3

Funding Rounds

Carbon Analytics provides a SaaS platform solution designed to assess carbon emissions in companies' supply chains and generate actionable data that can be used to reduce emissions.

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.

1

Funding Rounds

$490.0k

Money raised

One Planet Pizza is a company making plant-based pizza founded in 2016.

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:

1

Funding Rounds

$2.9m

Money raised

Stuffstr is a London-based recommerce technology company, founded by John Atcheson in 2014.

Key people:

7

Funding Rounds

$172.1m

Money raised

Tokamak Energy is a fusion energy producer founded in 2009 by Alan Sykes, David Kingham and Mikhail Gryaznevich.

Key people:

1

Funding Rounds

Pavegen is a London-based company founded by Laurence Kemball-Cook.

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

$125.8m

Money raised

AllPlants is a VC-backed B-Corp on a mission to become Earth's most forward-thinking food company.

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

Location:

Key people:

1

Funding Rounds

$15.0m

Money raised

Briggo is a company developing an automatic coffee-dispensing machine.

6

Funding Rounds

$732.4m

Money raised

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

5

Funding Rounds

$65.4m

Money raised

An agricultural biotechnology company producing renewable, biomass-based fuels and raw materials

9

Funding Rounds

$138.9m

Money raised

SkySpecs is a company founded in 2012 by Daniel Ellis.

4

Funding Rounds

$232.5m

Money raised

Stable is a risk management platform that helps businesses manage their exposure to volatile commodity prices.

Location:

Key people:

1

Funding Rounds

$14.0m

Money raised

Wicked Kitchen is a vegan food brand started by Derek and Chad Sarno in February, 2016. Wicked healthy makes plant-based recipes for vegans and meat eaters that are made available through their website and Wicked Healthy Cookbook.

Key people:

1

Funding Rounds

$4.0m

Money raised

Vita Coco is a United Kingdom-based company founded in 2004.

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.

2

Funding Rounds

$48.0m

Money raised

Daring Foods is a company making plant-based chicken products founded in 2018 by Ross Mackay.

Location:

Key people:

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

Key people:

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

$110.0m

Money raised

ESG Book is a global leader in sustainability data and technology, trusted by many of the world's largest financial organisations.

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:

9

Funding Rounds

$41.9m

Money raised

Econic Technologies is a company developing catalyst chemistry to turn waste carbon dioxide into economic and environmental products.

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:

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