Top list · United Kingdom

Climate tech startups in the United Kingdom

256 climate tech startups in the United Kingdom have raised money in rounds we track. These are the 50 that have raised the most, $11B between them, with London the most common home.

$11Braised by these 50
256on our record in all
Londonmost common home
SSEraised the most
  1. 1SSEFounded 1998Perth, United Kingdom$2.7Blast round Jun 2026
  2. 2CuspAICuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin.

    CuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin.

    Founded 2024Cambridge, United Kingdom$950Mlast round Jul 2026
  3. 3RSK GroupRSK Group is a privately-owned multi-disciplinary environmental consultancy and one of the fastest growing companies.

    RSK Group is a privately-owned multi-disciplinary environmental consultancy and one of the fastest growing companies.

    Founded 1989Helsby, United Kingdom$705Mlast round Sept 2024
  4. 4Octopus Energy GroupOctopus Energy Group is an England-based holding company that operates businesses in areas such as energy generation and electric vehicle sales.

    Octopus Energy Group is an England-based holding company that operates businesses in areas such as energy generation and electric vehicle sales.

    Founded 2016London, United Kingdom$681Mlast round Dec 2025
  5. 5Atome EnergyAtome Energy is the green hydrogen and ammonia project development company to create a greener, cleaner environment.

    Atome Energy is the green hydrogen and ammonia project development company to create a greener, cleaner environment.

    Founded -Leeds, United Kingdom$665Mlast round Apr 2026
  6. 6NewcleoNewcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies.

    Newcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies.

    Founded 2021Paris, United Kingdom$563Mlast round Sept 2026
  7. 7ZenobēFounded -United Kingdom$382Mlast round Jul 2025
  8. 8Atrato Onsite EnergyAtrato Onsite Energy is a commercial rooftop solar funder.

    Atrato Onsite Energy is a commercial rooftop solar funder.

    Founded -London, United Kingdom$327Mlast round Apr 2025
  9. 9IchthionIchthion engaged in Development of cutting-edge technology to restore the ocean environment.

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

    Founded 2017United Kingdom$271Mlast round Jan 2024
  10. 10FieldField is Strava for football, tennis and padel.

    Field is Strava for football, tennis and padel.

    Founded 2019United Kingdom$265Mlast round Sept 2024
  11. 11Nexus ReGenNexus ReGen is a UK-based digital materials management platform designed for the construction industry.

    Nexus ReGen is a UK-based digital materials management platform designed for the construction industry.

    Founded 2023Crawley, United Kingdom$254Mlast round May 2026
  12. 12AMPYR Distributed EnergyAMPYR Distributed Energy designs, constructs, owns, and operates sustainable energy technology.

    AMPYR Distributed Energy designs, constructs, owns, and operates sustainable energy technology.

    Founded -London, United Kingdom$229Mlast round May 2025
  13. 13EVCEVC's core focus is on providing convenient, practical and reliable 'destination' charging options for its growing customer base

    EVC's core focus is on providing convenient, practical and reliable 'destination' charging options for its growing customer base

    Founded 2020United Kingdom$199Mlast round Feb 2023
  14. 14GeoPuraGeoPura is enabling the production, transport, and use of zero-emissions fuels with innovative and commercially viable technology.

    GeoPura is enabling the production, transport, and use of zero-emissions fuels with innovative and commercially viable technology.

    Founded 2019Wysall, United Kingdom$194Mlast round Aug 2026
  15. 15Just ClimateFounded 2021United Kingdom$175Mlast round Mar 2025
  16. 16Highview PowerHighview Power is a renewable energy company that develops liquid-air energy storage solutions for grid applications.

    Highview Power is a renewable energy company that develops liquid-air energy storage solutions for grid applications.

    Founded 2005London, United Kingdom$171Mlast round Nov 2025
  17. 17AmpergiaAmpergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali.

    Ampergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali.

    Founded 2021Milton Keynes, United Kingdom$168Mlast round Jan 2022
  18. 18First Light FusionFirst Light Fusion is a British company based in Oxfordshire, focused on developing innovative solutions for fusion energy through inertial confinement.

    First Light Fusion is a British company based in Oxfordshire, focused on developing innovative solutions for fusion energy through inertial confinement.

    Founded 2011Yarnton, United Kingdom$167Mlast round Apr 2026
  19. 19BBOXXBboxx manufactures plug and play solar systems.

    Bboxx manufactures plug and play solar systems.

    Founded 2010London, United Kingdom$167Mlast round Apr 2025
  20. 20Breathe Battery TechnologiesBreathe Battery Technologies is a developer of electric vehicle battery charging control software for automotive manufacturers.

    Breathe Battery Technologies is a developer of electric vehicle battery charging control software for automotive manufacturers.

    Founded 2019United Kingdom$132Mlast round Aug 2026
  21. 21Mytrah EnergyMytrah Energy (India) Limited (MEIL), a wholly owned subsidiary of Guernsey based and AIM/LSE listed MEL in India,

    Mytrah Energy (India) Limited (MEIL), a wholly owned subsidiary of Guernsey based and AIM/LSE listed MEL in India,

    Founded 2009Hyderabad, United Kingdom$130Mlast round Apr 2015
  22. 22Connected KerbConnected Kerb Limited is an electric vehicle (EV) infrastructure company based in London, UK, founded in 2017.

    Connected Kerb Limited is an electric vehicle (EV) infrastructure company based in London, UK, founded in 2017.

    Founded 2017London, United Kingdom$123Mlast round Jan 2025
  23. 23A-GasA-Gas is a producer of industrial gases and specialized chemicals.

    A-Gas is a producer of industrial gases and specialized chemicals.

    Founded 1993Portishead, United Kingdom$116Mlast round Apr 2011
  24. 24GMTGMT is an advertising company that provides media buying, user acquisition, retention, and marketing solutions with data-driven technology.

    GMT is an advertising company that provides media buying, user acquisition, retention, and marketing solutions with data-driven technology.

    Founded 2012United Kingdom$108Mlast round Apr 2026
  25. 25NexeonNexeon is a leading international developer and manufacturer of breakthrough silicon-based anode materials for lithium-ion batteries.

    Nexeon is a leading international developer and manufacturer of breakthrough silicon-based anode materials for lithium-ion batteries.

    Founded 2006Abingdon, United Kingdom$97Mlast round Mar 2026
  26. 26NotplaNotpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier.

    Notpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier.

    Founded 2014London, United Kingdom$89Mlast round Jul 2026
  27. 27Oxford PVOxford PV is a provider of perovskite solar cells.

    Oxford PV is a provider of perovskite solar cells.

    Founded 2010Oxford, United Kingdom$84Mlast round Jul 2019
  28. 28HubberHUBBER is an IT company that has created an online platform for trading platforms (online stores, marketplaces) and suppliers of goods.

    HUBBER is an IT company that has created an online platform for trading platforms (online stores, marketplaces) and suppliers of goods.

    Founded 2016United Kingdom$81Mlast round Aug 2025
  29. 29NattergalNattergal operates as a nature restoration company.

    Nattergal operates as a nature restoration company.

    Founded -Grantham, United Kingdom$73Mlast round Oct 2024
  30. 30Corio GenerationCorio Generation is a London-based offshore wind developer, established in 2022 and part of the Macquarie Group.

    Corio Generation is a London-based offshore wind developer, established in 2022 and part of the Macquarie Group.

    Founded 2022London, United Kingdom$70Mlast round Mar 2023
  31. 31ConvergeConstruction Technology.

    Construction Technology.

    Founded 2014London, United Kingdom$69Mlast round May 2025
  32. 32SLR ConsultingSLR is an environmental consultancy that provides advice and support on a wide range of strategic and site-specific environmental issues.

    SLR is an environmental consultancy that provides advice and support on a wide range of strategic and site-specific environmental issues.

    Founded 1994Aylesbury, United Kingdom$64Mlast round Jun 2008
  33. 33Epoch BiodesignEpoch Biodesign is a London-based synthetic biology company founded in 2019.

    Epoch Biodesign is a London-based synthetic biology company founded in 2019.

    Founded 2019London, United Kingdom$59Mlast round Mar 2026
  34. 34UndoUndo is the time travel debugging company for Linux.

    Undo is the time travel debugging company for Linux.

    Founded 2012Cambridge, United Kingdom$57Mlast round Jun 2026
  35. 35ARC RideFounded -United Kingdom$57Mlast round Sept 2026
  36. 36OLIOOlio is a Digital Agency specialising in bespoke web development and provision of web services.

    Olio is a Digital Agency specialising in bespoke web development and provision of web services.

    Founded 2008United Kingdom$54Mlast round Sept 2021
  37. 37IsometricIsometric is a London-based certification platform focused on the industrial economy, specializing in carbon removal registry and science services.

    Isometric is a London-based certification platform focused on the industrial economy, specializing in carbon removal registry and science services.

    Founded 2022London, United Kingdom$50Mlast round Sept 2026
  38. 38RivanFounded 2026United Kingdom$47Mlast round Apr 2026
  39. 39NatureMetricsNatureMetrics is a global environmental technology company that offers a subscription service for biodiversity monitoring and nature impact reporting, utilizing

    NatureMetrics is a global environmental technology company that offers a subscription service for biodiversity monitoring and nature impact reporting, utilizing

    Founded 2014Egham, United Kingdom$47Mlast round Jun 2026
  40. 40BioticNRGBioticNRG is a UK-based bioenergy platform focused on converting organic waste into renewable energy through anaerobic digestion and composting.

    BioticNRG is a UK-based bioenergy platform focused on converting organic waste into renewable energy through anaerobic digestion and composting.

    Founded 2022Ipswich, United Kingdom$46Mlast round Jul 2024
  41. 41RayloRaylo is a UK-based technology subscription and leasing platform that promotes a circular economy for consumer electronics.

    Raylo is a UK-based technology subscription and leasing platform that promotes a circular economy for consumer electronics.

    Founded 2019London, United Kingdom$42Mlast round Jan 2026
  42. 42Bluewater BioThe UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.

    The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.

    Founded 2007London, United Kingdom$38Mlast round Dec 2021
  43. 43Oxford FlowOxford Flow is a British valve manufacturer and technology innovator, established in 2015 as a spin-out from the University of Oxford.

    Oxford Flow is a British valve manufacturer and technology innovator, established in 2015 as a spin-out from the University of Oxford.

    Founded 2015Witney, United Kingdom$38Mlast round Dec 2025
  44. 44Rivan IndustriesRivan Industries is a London-based startup focused on renewable energy and synthetic fuels, founded in 2024 by Harvey Hodd.

    Rivan Industries is a London-based startup focused on renewable energy and synthetic fuels, founded in 2024 by Harvey Hodd.

    Founded 2023Lewisham, United Kingdom$36Mlast round Dec 2025
  45. 45Geothermal EngineeringGeothermal Engineering is engaged in the development of deep geothermal heat and power projects.

    Geothermal Engineering is engaged in the development of deep geothermal heat and power projects.

    Founded 2008Redruth, United Kingdom$35Mlast round Aug 2025
  46. 46EO ChargingEO Charging designs smart electric vehicle chargers and intelligent software for homes, workplaces, and destinations.

    EO Charging designs smart electric vehicle chargers and intelligent software for homes, workplaces, and destinations.

    Founded 2015Stowmarket, United Kingdom$33Mlast round Nov 2025
  47. 474NewFounded 2017United Kingdom$31Mlast round Dec 2017
  48. 48Aquamarine PowerAquamarine Power is a wave energy company developing a hydro-electric wave energy converter called Oyster.

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

    Founded 2005United Kingdom$28Mlast round Sept 2011
  49. 49Mission ZeroMission Zero helps real estate facilities and their portfolio companies improve their ESG performance by eliminating waste from cafeteria and catering operation

    Mission Zero helps real estate facilities and their portfolio companies improve their ESG performance by eliminating waste from cafeteria and catering operation

    Founded 2022Houston, United Kingdom$28Mlast round Aug 2025
  50. 50GreyparrotGreyparrot is a London-based company founded in 2019 that specializes in AI-driven waste intelligence.

    Greyparrot is a London-based company founded in 2019 that specializes in AI-driven waste intelligence.

    Founded 2019London, United Kingdom$27Mlast round Jul 2026
Total fundinghow the list is ranked
15 November 2026updated nightly
Rounds we tracksource: Millionrounds

Companies whose funding rounds we classed as any of these sectors, 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 investorsAll top lists

More climate tech lists

See all
VGCARClimate tech startups worldwide1,975 companies · $77BSEPSClimate tech startups in Europe756 companies · $25BVGCARClimate tech startups in the United States720 companies · $62BEGFEFClimate tech startups in Canada126 companies · $2.8BEPF1Climate tech startups in Germany92 companies · $5.5BHDSClimate tech startups in France86 companies · $1.7BRGSFClimate tech startups in the Netherlands71 companies · $2.7BMCBEZClimate tech startups in Spain34 companies · $2.3B

More lists for United Kingdom

See all
SCNFStartups in the United Kingdom8,355 companies · $79BILCSONHealth startups in the United Kingdom1,094 companies · $17BNAAILAI startups in the United Kingdom835 companies · $32BCTKIT Services startups in the United Kingdom816 companies · $5.3BILCSONHealthcare startups in the United Kingdom608 companies · $14BILCSONBiotech startups in the United Kingdom588 companies · $15BFFCRFinancial Services startups in the United Kingdom472 companies · $26BFCRCFintech startups in the United Kingdom342 companies · $23B