Top list · United Kingdom

Energy startups in the United Kingdom

206 energy startups in the United Kingdom have raised money in rounds we track. These are the 50 that have raised the most, $15B between them, with London the most common home.

$15Braised by these 50
206on our record in all
Londonmost common home
SSEraised the most
  1. 1SSEFounded 1998Perth, United Kingdom$2.7Blast round Jun 2026
  2. 2Rolls-Royce SMRRolls-Royce SMR specializes in producing factory-built nuclear power plants and offers sustainable, low-cost energy solutions.

    Rolls-Royce SMR specializes in producing factory-built nuclear power plants and offers sustainable, low-cost energy solutions.

    Founded 2021Derby, United Kingdom$1.2Blast round Apr 2026
  3. 3CuspAICuspAI 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
  4. 4Renewable Power CapitalRenewable Power Capital is a renewable energy investment platform that focuses on energy industries.

    Renewable Power Capital is a renewable energy investment platform that focuses on energy industries.

    Founded 2020London, United Kingdom$915Mlast round Sept 2026
  5. 5Fidra EnergyFidra Energy is a battery energy storage firm/business that aims to aid decarbonization for electrical system.

    Fidra Energy is a battery energy storage firm/business that aims to aid decarbonization for electrical system.

    Founded 2024Edinburgh, United Kingdom$804Mlast round Sept 2025
  6. 6EelpowerEelpower is a battery storage developer that operates energy storage solutions.

    Eelpower is a battery storage developer that operates energy storage solutions.

    Founded 2017London, United Kingdom$682Mlast round Aug 2025
  7. 7Zenobe EnergyZenobe Energy manufactures battery storage assets for electric bus operators, utilities, and industrial and commercial businesses.

    Zenobe Energy manufactures battery storage assets for electric bus operators, utilities, and industrial and commercial businesses.

    Founded 2016London, United Kingdom$515Mlast round Jun 2026
  8. 8AgratasAgrata's aim is to build world-class teams and provide best-in-class technologies.

    Agrata's aim is to build world-class teams and provide best-in-class technologies.

    Founded -London, United Kingdom$509Mlast round Apr 2026
  9. 9Siccar Point EnergySiccar Point Energy provides oil and gas exploration, development, and production.

    Siccar Point Energy provides oil and gas exploration, development, and production.

    Founded 2014United Kingdom$500Mlast round Sept 2014
  10. 10British Solar RenewablesBritish Solar Renewables specializes in planning, designing, developing and maintaining renewable projects.

    British Solar Renewables specializes in planning, designing, developing and maintaining renewable projects.

    Founded 2010Shepton Mallet, United Kingdom$474Mlast round Jun 2025
  11. 11Octopus Renewables Infrastructure TrustOctopus Renewables Infrastructure Trust is a closed end investment company incorporated in England and Wales.

    Octopus Renewables Infrastructure Trust is a closed end investment company incorporated in England and Wales.

    Founded 2019London, United Kingdom$431Mlast round Feb 2025
  12. 12ZenobēFounded -United Kingdom$382Mlast round Jul 2025
  13. 13Pulse Clean EnergyPulse Clean Energy builds and operates power stations.

    Pulse Clean Energy builds and operates power stations.

    Founded 2022Birmingham, United Kingdom$364Mlast round Apr 2026
  14. 14Atrato 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
  15. 15Cero GenerationCero Generation is a solar energy company that develops solar energy and energy storage solutions.

    Cero Generation is a solar energy company that develops solar energy and energy storage solutions.

    Founded 2021London, United Kingdom$312Mlast round Jul 2025
  16. 16Statera EnergyStatera Energy is a company that generates, transmissions, and distributes electric energy.

    Statera Energy is a company that generates, transmissions, and distributes electric energy.

    Founded 2015London, United Kingdom$307Mlast round Nov 2025
  17. 17Seven EnergySeven Energy is an indigenous Nigerian oil and gas exploration, development, production and distribution company.

    Seven Energy is an indigenous Nigerian oil and gas exploration, development, production and distribution company.

    Founded 2004Lagos, United Kingdom$255Mlast round Apr 2014
  18. 18Constantine Energy StorageConstantine Energy Storage is an energy storage company that provides energy management and renewable energy services.

    Constantine Energy Storage is an energy storage company that provides energy management and renewable energy services.

    Founded 2021Godalming, United Kingdom$234Mlast round Mar 2025
  19. 19AMPYR Solar EuropeAMPYR Solar Europe is an Independent electricity generator and solar development.

    AMPYR Solar Europe is an Independent electricity generator and solar development.

    Founded 2020London, United Kingdom$214Mlast round Jun 2023
  20. 20Flexion EnergyFlexion Energy is a modern utility and energy storage infrastructure specialist, which is bridging the gap between development and finance.

    Flexion Energy is a modern utility and energy storage infrastructure specialist, which is bridging the gap between development and finance.

    Founded 2014London, United Kingdom$207Mlast round Jul 2021
  21. 21EVCEVC'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
  22. 22Pentland Floating Offshore Wind FarmPentland Floating Offshore Wind Farm energy infrastructure, including offshore wind, onshore wind, solar photovoltaic (PV).

    Pentland Floating Offshore Wind Farm energy infrastructure, including offshore wind, onshore wind, solar photovoltaic (PV).

    Founded 2012Edinburgh, United Kingdom$196Mlast round Nov 2025
  23. 23Discover ExplorationDiscover Exploration is an upstream oil & gas company with E&P assets in Europe, Africa and Australasia.

    Discover Exploration is an upstream oil & gas company with E&P assets in Europe, Africa and Australasia.

    Founded 2012London, United Kingdom$184Mlast round Feb 2025
  24. 24First 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
  25. 25BBOXXBboxx manufactures plug and play solar systems.

    Bboxx manufactures plug and play solar systems.

    Founded 2010London, United Kingdom$167Mlast round Apr 2025
  26. 26SunsaveSunsave Group Ltd, also known as Sunsave Energy Limited, is a London-based renewable energy technology company founded in 2022 by Alick Dru and Ben Graves.

    Sunsave Group Ltd, also known as Sunsave Energy Limited, is a London-based renewable energy technology company founded in 2022 by Alick Dru and Ben Graves.

    Founded 2022London, United Kingdom$166Mlast round Jul 2026
  27. 27Cornish LithiumCornish Lithium is a mineral exploration and development company supplying lithium raw materials for sustainable energy solutions.

    Cornish Lithium is a mineral exploration and development company supplying lithium raw materials for sustainable energy solutions.

    Founded 2016Penryn, United Kingdom$165Mlast round Mar 2026
  28. 28NyoboltNyobolt is an energy storage technology company based in Cambridge, UK, founded in 2019.

    Nyobolt is an energy storage technology company based in Cambridge, UK, founded in 2019.

    Founded 2019Impington, United Kingdom$155Mlast round Aug 2026
  29. 29EnshoreEnshore is a UK based subsea trenching company, providing seabed intervention services to mega-projects across industry around the world.

    Enshore is a UK based subsea trenching company, providing seabed intervention services to mega-projects across industry around the world.

    Founded 2019Blyth, United Kingdom$138Mlast round Jan 2026
  30. 30Breathe 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
  31. 31Greener Solutions GroupGreener Solutions Group specializes in retrofit design and assessment services.

    Greener Solutions Group specializes in retrofit design and assessment services.

    Founded 2015North Shields, United Kingdom$131Mlast round Mar 2022
  32. 32HaventusHaventus is an energy management firm that focuses on facilitating the energy transition and supporting economic development.

    Haventus is an energy management firm that focuses on facilitating the energy transition and supporting economic development.

    Founded 2021Ardersier, United Kingdom$126Mlast round May 2024
  33. 33Fuse EnergyFuse is an energy supplier that offers the UK's cheapest electricity tarif.

    Fuse is an energy supplier that offers the UK's cheapest electricity tarif.

    Founded 2022London, United Kingdom$111Mlast round Jun 2026
  34. 34SunswapSunswap is a British manufacturer specializing in fully electric, battery and solar-powered transport refrigeration units.

    Sunswap is a British manufacturer specializing in fully electric, battery and solar-powered transport refrigeration units.

    Founded 2020Leatherhead, United Kingdom$106Mlast round Apr 2026
  35. 35Eden SustainableEden Sustainable operates in finance, focusing on solar PV systems development, construction, funding, and operation.

    Eden Sustainable operates in finance, focusing on solar PV systems development, construction, funding, and operation.

    Founded 2014Exeter, United Kingdom$95Mlast round May 2025
  36. 36FYLDFYLD enhances productivity and safety on-site by providing real-time remote visibility and data analytics capabilities.

    FYLD enhances productivity and safety on-site by providing real-time remote visibility and data analytics capabilities.

    Founded 2020United Kingdom$84Mlast round Feb 2026
  37. 37Echion TechnologiesEchion Technologies is a leading battery technology company based in Cambridge, UK.

    Echion Technologies is a leading battery technology company based in Cambridge, UK.

    Founded 2017Cambridge, United Kingdom$84Mlast round Nov 2024
  38. 38Hive EnergyHive Energy is one of the UK’s leading developers of solar PV energy helping people harness the power of the sun

    Hive Energy is one of the UK’s leading developers of solar PV energy helping people harness the power of the sun

    Founded 2010East Wellow, United Kingdom$79Mlast round Nov 2025
  39. 39Varco EnergyVarco Energy is a battery storage asset owner and operator.

    Varco Energy is a battery storage asset owner and operator.

    Founded 2021London, United Kingdom$75Mlast round Sept 2023
  40. 40TemTem Energy Limited, based in London, is an innovative energy technology company founded in 2021.

    Tem Energy Limited, based in London, is an innovative energy technology company founded in 2021.

    Founded 2021London, United Kingdom$75Mlast round Feb 2026
  41. 41FaradionIt is already impressive IP portfolio is growing and, with a wide range of products available

    It is already impressive IP portfolio is growing and, with a wide range of products available

    Founded 2010Sheffield, United Kingdom$70Mlast round Jan 2022
  42. 42Ithaca EnergyA North Sea oil and gas operator focused on the delivery of lower risk growth through the appraisal and development of UK

    A North Sea oil and gas operator focused on the delivery of lower risk growth through the appraisal and development of UK

    Founded 2004Aberdeen, United Kingdom$66Mlast round Oct 2015
  43. 43Vision Blue ResourcesVision Blue Resources is to create a portfolio of strategic investments in clean energy-related metal and mineral resource companies.

    Vision Blue Resources is to create a portfolio of strategic investments in clean energy-related metal and mineral resource companies.

    Founded 2021United Kingdom$60Mlast round Feb 2021
  44. 44Eku EnergyEku Energy is a globally diversified and technology enabled energy storage business.

    Eku Energy is a globally diversified and technology enabled energy storage business.

    Founded 2022London, United Kingdom$60Mlast round May 2025
  45. 45IsembardIsembard is a British software-first manufacturing company founded in 2024.

    Isembard is a British software-first manufacturing company founded in 2024.

    Founded 2024London, United Kingdom$59Mlast round Mar 2026
  46. 46Thames WaterThames Water Utilities Limited is a U.K.-based water and sewerage company that provides clean and take away waste water.

    Thames Water Utilities Limited is a U.K.-based water and sewerage company that provides clean and take away waste water.

    Founded 1989Reading, United Kingdom$59Mlast round Mar 2024
  47. 47ARC RideFounded -United Kingdom$57Mlast round Sept 2026
  48. 48Logan EnergyLogan Energy design, install, commission and maintain Energy Centres across the UK and Europe.

    Logan Energy design, install, commission and maintain Energy Centres across the UK and Europe.

    Founded 1955Edinburgh, United Kingdom$54Mlast round Feb 2026
  49. 49Nova InnovationNova Innovation is an energy company that designs, builds, operates tidal energy devices, and develops sites for arrays of tidal turbines.

    Nova Innovation is an energy company that designs, builds, operates tidal energy devices, and develops sites for arrays of tidal turbines.

    Founded 2010Edinburgh, United Kingdom$51Mlast round Aug 2026
  50. 50BBOCCFounded -United Kingdom$50Mlast round Aug 2019
Total fundinghow the list is ranked
15 November 2026updated nightly
Rounds we tracksource: Millionrounds

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

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