# Top 50 Climate Tech Startups in the United Kingdom by Funding (2026)

> The 50 best-funded climate Tech startups in the United Kingdom, ranked by total funding raised: $3.4B combined.

Source: https://millionrounds.com/top-lists/climate-startups-united-kingdom (Millionrounds; every figure on the page links to its filing or article)

- 1 [**RSK Group** RSK Group is a privately-owned multi-disciplinary environmental consultancy and one of the fastest growing companies.](https://millionrounds.com/company/rsk-group) RSK Group is a privately-owned multi-disciplinary environmental consultancy and one of the fastest growing companies. *Founded* 1989 Helsby, United Kingdom **$705M** last round Sept 2024
- 2 [**Atome Energy** Atome Energy is the green hydrogen and ammonia project development company to create a greener, cleaner environment.](https://millionrounds.com/company/atome-energy) Atome Energy is the green hydrogen and ammonia project development company to create a greener, cleaner environment. *Founded* - Leeds, United Kingdom **$665M** last round Apr 2026
- 3 [**Nexus ReGen** Nexus ReGen is a UK-based digital materials management platform designed for the construction industry.](https://millionrounds.com/company/nexus-regen) Nexus ReGen is a UK-based digital materials management platform designed for the construction industry. *Founded* 2023 Crawley, United Kingdom **$254M** last round May 2026
- 4 [**EVC** EVC's core focus is on providing convenient, practical and reliable 'destination' charging options for its growing customer base](https://millionrounds.com/company/evc) EVC's core focus is on providing convenient, practical and reliable 'destination' charging options for its growing customer base *Founded* 2020 United Kingdom **$199M** last round Feb 2023
- 5 [**Just Climate**](https://millionrounds.com/company/just-climate) *Founded* 2021 United Kingdom **$175M** last round Mar 2025
- 6 [**Breathe Battery Technologies** Breathe Battery Technologies is a developer of electric vehicle battery charging control software for automotive manufacturers.](https://millionrounds.com/company/breathe-battery-technologies) Breathe Battery Technologies is a developer of electric vehicle battery charging control software for automotive manufacturers. *Founded* 2019 United Kingdom **$132M** last round Aug 2026
- 7 [**A-Gas** A-Gas is a producer of industrial gases and specialized chemicals.](https://millionrounds.com/company/a-gas) A-Gas is a producer of industrial gases and specialized chemicals. *Founded* 1993 Portishead, United Kingdom **$116M** last round Apr 2011
- 8 [**Notpla** Notpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier.](https://millionrounds.com/company/notpla) Notpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier. *Founded* 2014 London, United Kingdom **$89M** last round Jul 2026
- 9 [**Nattergal** Nattergal operates as a nature restoration company.](https://millionrounds.com/company/nattergal) Nattergal operates as a nature restoration company. *Founded* - Grantham, United Kingdom **$73M** last round Oct 2024
- 10 [**Converge** Construction Technology.](https://millionrounds.com/company/converge) Construction Technology. *Founded* 2014 London, United Kingdom **$69M** last round May 2025
- 11 [**SLR Consulting** SLR is an environmental consultancy that provides advice and support on a wide range of strategic and site-specific environmental issues.](https://millionrounds.com/company/slr-consulting) SLR is an environmental consultancy that provides advice and support on a wide range of strategic and site-specific environmental issues. *Founded* 1994 Aylesbury, United Kingdom **$64M** last round Jun 2008
- 12 [**Epoch Biodesign** Epoch Biodesign is a London-based synthetic biology company founded in 2019.](https://millionrounds.com/company/epoch-biodesign) Epoch Biodesign is a London-based synthetic biology company founded in 2019. *Founded* 2019 London, United Kingdom **$59M** last round Mar 2026
- 13 [**Undo** Undo is the time travel debugging company for Linux.](https://millionrounds.com/company/undo) Undo is the time travel debugging company for Linux. *Founded* 2012 Cambridge, United Kingdom **$57M** last round Jun 2026
- 14 [**ARC Ride**](https://millionrounds.com/company/arc-ride) *Founded* - United Kingdom **$57M** last round Sept 2026
- 15 [**Isometric** Isometric is a London-based certification platform focused on the industrial economy, specializing in carbon removal registry and science services.](https://millionrounds.com/company/isometric) Isometric is a London-based certification platform focused on the industrial economy, specializing in carbon removal registry and science services. *Founded* 2022 London, United Kingdom **$50M** last round Sept 2026
- 16 [**Rivan**](https://millionrounds.com/company/rivan) *Founded* 2026 United Kingdom **$47M** last round Apr 2026
- 17 [**NatureMetrics** NatureMetrics is a global environmental technology company that offers a subscription service for biodiversity monitoring and nature impact reporting, utilizing](https://millionrounds.com/company/naturemetrics) NatureMetrics is a global environmental technology company that offers a subscription service for biodiversity monitoring and nature impact reporting, utilizing *Founded* 2014 Egham, United Kingdom **$47M** last round Jun 2026
- 18 [**Raylo** Raylo is a UK-based technology subscription and leasing platform that promotes a circular economy for consumer electronics.](https://millionrounds.com/company/raylo) Raylo is a UK-based technology subscription and leasing platform that promotes a circular economy for consumer electronics. *Founded* 2019 London, United Kingdom **$42M** last round Jan 2026
- 19 [**Bluewater Bio** The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.](https://millionrounds.com/company/bluewater-bio) The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater. *Founded* 2007 London, United Kingdom **$38M** last round Dec 2021
- 20 [**Mission Zero** Mission Zero helps real estate facilities and their portfolio companies improve their ESG performance by eliminating waste from cafeteria and catering operation](https://millionrounds.com/company/mission-zero) Mission Zero helps real estate facilities and their portfolio companies improve their ESG performance by eliminating waste from cafeteria and catering operation *Founded* 2022 Houston, United Kingdom **$28M** last round Aug 2025
- 21 [**Greyparrot** Greyparrot is a London-based company founded in 2019 that specializes in AI-driven waste intelligence.](https://millionrounds.com/company/greyparrot) Greyparrot is a London-based company founded in 2019 that specializes in AI-driven waste intelligence. *Founded* 2019 London, United Kingdom **$27M** last round Jul 2026
- 22 [**Altilium**](https://millionrounds.com/company/altilium) *Founded* 2022 United Kingdom **$25M** last round Apr 2026
- 23 [**Longevity Partners** Longevity Partners is a global sustainability consultancy founded in 2015, based in London.](https://millionrounds.com/company/longevity-partners) Longevity Partners is a global sustainability consultancy founded in 2015, based in London. *Founded* 2015 London, United Kingdom **$24M** last round Nov 2025
- 24 [**Barocal** Barocal is a Cambridge University spin-out founded in 2019, focused on developing solid-state cooling and heating technologies.](https://millionrounds.com/company/barocal) Barocal is a Cambridge University spin-out founded in 2019, focused on developing solid-state cooling and heating technologies. *Founded* 2019 Cambridge, United Kingdom **$23M** last round May 2026
- 25 [**Wren**](https://millionrounds.com/company/wren) *Founded* - United Kingdom **$21M** last round Jul 2022
- 26 [**Pollination** Pollination is a global climate change investment and advisory firm based in London, United Kingdom.](https://millionrounds.com/company/pollination) Pollination is a global climate change investment and advisory firm based in London, United Kingdom. *Founded* 2019 London, United Kingdom **$20M** last round Nov 2024
- 27 [**Atmospheric AI** Atmospheric AI is a London-based B2B software company that specializes in creating an AI-first platform for developing a dynamic digital twin of the raw materia](https://millionrounds.com/company/atmospheric-ai) Atmospheric AI is a London-based B2B software company that specializes in creating an AI-first platform for developing a dynamic digital twin of the raw materia *Founded* 2025 London, United Kingdom **$20M** last round Nov 2026
- 28 [**Safi** Sustainable clothing start-up brand inspired by vintage trends with a modern twist](https://millionrounds.com/company/safi) Sustainable clothing start-up brand inspired by vintage trends with a modern twist *Founded* 2018 United Kingdom **$20M** last round Nov 2023
- 29 [**Nuada** We help hard-to-abate industries to decarbonise by vacuuming CO2 out of flue gas](https://millionrounds.com/company/nuada) We help hard-to-abate industries to decarbonise by vacuuming CO2 out of flue gas *Founded* 2012 Newtownabbey, United Kingdom **$19M** last round Oct 2026
- 30 [**Gridcog** Gridcog is a B2B SaaS energy technology company based in London, United Kingdom, founded in 2020.](https://millionrounds.com/company/gridcog) Gridcog is a B2B SaaS energy technology company based in London, United Kingdom, founded in 2020. *Founded* 2020 London, United Kingdom **$18M** last round Jul 2026
- 31 [**Arvia Technology** Arvia Technology is a UK-based company founded in 2007, specializing in industrial wastewater treatment.](https://millionrounds.com/company/arvia-technology) Arvia Technology is a UK-based company founded in 2007, specializing in industrial wastewater treatment. *Founded* 2007 Runcorn, United Kingdom **$16M** last round Apr 2015
- 32 [**Adaptavate** Adaptavate is focussing on developing and commercialising material solutions that disrupt the conventional construction industry.](https://millionrounds.com/company/adaptavate) Adaptavate is focussing on developing and commercialising material solutions that disrupt the conventional construction industry. *Founded* 2014 Stonehouse, United Kingdom **$15M** last round Oct 2026
- 33 [**Supercritical** Supercritical Tech Ltd., based in London, is a carbon removal marketplace founded in 2021.](https://millionrounds.com/company/supercritical) Supercritical Tech Ltd., based in London, is a carbon removal marketplace founded in 2021. *Founded* - London, United Kingdom **$13M** last round May 2026
- 34 [**Extentia Group** Extentia Group was a built environment specialist group that operated in the UK and Ireland.](https://millionrounds.com/company/extentia-group) Extentia Group was a built environment specialist group that operated in the UK and Ireland. *Founded* 2018 Sale, United Kingdom **$13M** last round Jun 2019
- 35 [**Brilliant Planet** Brilliant Planet is a climate technology company based in London, founded in 2013.](https://millionrounds.com/company/brilliant-planet) Brilliant Planet is a climate technology company based in London, founded in 2013. *Founded* 2013 Harpenden, United Kingdom **$12M** last round Apr 2022
- 36 [**Highlands Rewilding** Highlands Rewilding's goal is to promote natural recovery and community prosperity through rewilding.](https://millionrounds.com/company/highlands-rewilding) Highlands Rewilding's goal is to promote natural recovery and community prosperity through rewilding. *Founded* 2020 United Kingdom **$11M** last round May 2023
- 37 [**Rhizocore Technologies** Rhizocore Technologies Ltd is a UK-based ecological innovation and biotechnology company focused on mycorrhizal fungi products.](https://millionrounds.com/company/rhizocore-technologies) Rhizocore Technologies Ltd is a UK-based ecological innovation and biotechnology company focused on mycorrhizal fungi products. *Founded* 2021 Edinburgh, United Kingdom **$11M** last round Nov 2025
- 38 [**Concretene** Concretene is a concrete alternative that is designed to provide a viable CO2 reduction technology in the construction industry.](https://millionrounds.com/company/concretene) Concretene is a concrete alternative that is designed to provide a viable CO2 reduction technology in the construction industry. *Founded* 2020 Manchester, United Kingdom **$9.9M** last round Oct 2026
- 39 [**Total Recycling Services** Total Recycling Services is a waste management and recycling company located in Darlington, England.](https://millionrounds.com/company/total-recycling-services) Total Recycling Services is a waste management and recycling company located in Darlington, England. *Founded* 2009 Darlington, United Kingdom **$9.7M** last round Feb 2016
- 40 [**WASE** WASE is a UK-based climate technology and environmental services company located in Bristol.](https://millionrounds.com/company/wase) WASE is a UK-based climate technology and environmental services company located in Bristol. *Founded* 2017 Bristol, United Kingdom **$9.4M** last round Mar 2024
- 41 [**Rainforest Builder** Rainforest Builder is a Nature Tech company dedicated to the restoration of tropical forests on a large scale.](https://millionrounds.com/company/rainforest-builder) Rainforest Builder is a Nature Tech company dedicated to the restoration of tropical forests on a large scale. *Founded* 2022 London, United Kingdom **$9.1M** last round Dec 2025
- 42 [**Earth Blox** Earth Blox is an environmental intelligence company based in Edinburgh, Scotland, founded in 2019.](https://millionrounds.com/company/earth-blox) Earth Blox is an environmental intelligence company based in Edinburgh, Scotland, founded in 2019. *Founded* 2019 Edinburgh, United Kingdom **$8.0M** last round Mar 2026
- 43 [**Greenback Recycling Technologies** Greenback Recycling Technologies is a UK-based advanced recycling company founded in 2018.](https://millionrounds.com/company/greenback-recycling-technologies) Greenback Recycling Technologies is a UK-based advanced recycling company founded in 2018. *Founded* 2019 London, United Kingdom **$7.8M** last round Apr 2022
- 44 [**Metris Energy** Metris Energy is the first AI-powered solar energy platform for commercial property owners.](https://millionrounds.com/company/metris-energy) Metris Energy is the first AI-powered solar energy platform for commercial property owners. *Founded* 2023 London, United Kingdom **$7.5M** last round Sept 2026
- 45 [**Cervest** Cervest is cloud-based provider of AI-powered Climate Intelligence that helps organizations manage and adapt to asset-level risk globally.](https://millionrounds.com/company/cervest) Cervest is cloud-based provider of AI-powered Climate Intelligence that helps organizations manage and adapt to asset-level risk globally. *Founded* 2016 Barcelona, United Kingdom **$7.2M** last round Apr 2023
- 46 [**Renew Risk** Renew Risk is a London-based InsurTech and FinTech company founded in 2021.](https://millionrounds.com/company/renew-risk) Renew Risk is a London-based InsurTech and FinTech company founded in 2021. *Founded* 2021 London, United Kingdom **$7.1M** last round Feb 2025
- 47 [**Springfield Healthcare** Springfield Healthcare delivers personal and domestic care for people who need it in their own homes.](https://millionrounds.com/company/springfield-healthcare) Springfield Healthcare delivers personal and domestic care for people who need it in their own homes. *Founded* 1967 United Kingdom **$6.9M** last round Jun 2012
- 48 [**Evove** Creates next-generation software solutions for multiple platforms.](https://millionrounds.com/company/evove) Creates next-generation software solutions for multiple platforms. *Founded* 2012 United Kingdom **$6.9M** last round Mar 2023
- 49 [**Bioomix** Bioomix is a biotechnology company that develops all-natural microbial products that can help farmers achieve a higher and better yield.](https://millionrounds.com/company/bioomix) Bioomix is a biotechnology company that develops all-natural microbial products that can help farmers achieve a higher and better yield. *Founded* - Odense, United Kingdom **$6.7M** last round Oct 2023
- 50 [**Connect Earth** Connect Earth is a London-based environmental data and climate fintech company founded in September 2021.](https://millionrounds.com/company/connect-earth) Connect Earth is a London-based environmental data and climate fintech company founded in September 2021. *Founded* 2021 London, United Kingdom **$6.5M** last round Dec 2025

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed in this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

Open any company for its rounds and investors, or search the investors who back climate Tech startups in the United Kingdom in the app, with filters, lists and exports.

[Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[All top lists](https://millionrounds.com/top-lists)

## More climate tech lists

[See all](https://millionrounds.com/top-lists?t=Climate%20Tech)

[*VG* *CF* *S* **Climate Tech startups in the United States** 270 companies · $27B](https://millionrounds.com/top-lists/climate-startups-united-states)[*VG* *S* *CF* **Climate Tech startups that raised in 2026** 195 companies · $20B in 2026](https://millionrounds.com/top-lists/climate-startups-raised-2026)[*1* *CB* *SC* **Climate Tech startups founded in 2021** 76 companies · $3.0B](https://millionrounds.com/top-lists/climate-startups-founded-2021)[*RP* *R* *M* **Climate Tech startups founded in 2022** 69 companies · $2.0B](https://millionrounds.com/top-lists/climate-startups-founded-2022)[*MC* *BB* *S* **Climate Tech startups founded in 2019** 66 companies · $2.1B](https://millionrounds.com/top-lists/climate-startups-founded-2019)[*SD* *1* *LE* **Climate Tech startups founded in 2020** 64 companies · $2.7B](https://millionrounds.com/top-lists/climate-startups-founded-2020)[*VG* *S* *CF* **Climate Tech startups in the United States that raised in 2026** 62 companies · $17B in 2026](https://millionrounds.com/top-lists/climate-startups-united-states-raised-2026)[*TM* *HG* *N* **Climate Tech startups founded in 2018** 48 companies · $1.4B](https://millionrounds.com/top-lists/climate-startups-founded-2018)

## More lists for United Kingdom

[See all](https://millionrounds.com/top-lists?r=United%20Kingdom)

[*SC* *N* *F* **Startups in the United Kingdom** 8,355 companies · $79B](https://millionrounds.com/top-lists/startups-united-kingdom)[*IL* *CS* *ON* **Health startups in the United Kingdom** 1,094 companies · $17B](https://millionrounds.com/top-lists/health-startups-united-kingdom)[*N* *AA* *IL* **AI startups in the United Kingdom** 835 companies · $32B](https://millionrounds.com/top-lists/ai-startups-united-kingdom)[*C* *T* *K* **IT Services startups in the United Kingdom** 816 companies · $5.3B](https://millionrounds.com/top-lists/it-services-startups-united-kingdom)[*IL* *CS* *ON* **Healthcare startups in the United Kingdom** 608 companies · $14B](https://millionrounds.com/top-lists/healthcare-startups-united-kingdom)[*IL* *CS* *ON* **Biotech startups in the United Kingdom** 588 companies · $15B](https://millionrounds.com/top-lists/biotech-startups-united-kingdom)[*F* *FC* *R* **Financial Services startups in the United Kingdom** 472 companies · $26B](https://millionrounds.com/top-lists/financial-services-startups-united-kingdom)[*FC* *R* *C* **Fintech startups in the United Kingdom** 342 companies · $23B](https://millionrounds.com/top-lists/fintech-startups-united-kingdom)