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Top 100 Green Energy startups in UK
Jul 15, 2025 | By Alexander Gillet | 27 |
1
Funding: £26M
HiiROC is an industrial company that produces hydrogen from biomethane, flare gas, or natural gas with no CO2 emissions.
HiiROC is an industrial company that produces hydrogen from biomethane, flare gas, or natural gas with no CO2 emissions.
2
Funding: $1.1M
Ki Hydrogen is a deep-tech venture that develops waste-to-hydrogen technology.
Ki Hydrogen is a deep-tech venture that develops waste-to-hydrogen technology.
3
Funding: $33M
Breathe 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.
4
Funding: £447M
OVO Energy is an independent energy technology company and supplier. OVO also installs world’s most advanced storage heaters
OVO Energy is an independent energy technology company and supplier. OVO also installs world’s most advanced storage heaters
5
Funding: £200M
Deep Green has developed a “digital boiler” technology to use the heat produced by data centers for swimming pools, apartment blocks, distilleries, laundrettes, and bakeries.
Deep Green has developed a “digital boiler” technology to use the heat produced by data centers for swimming pools, apartment blocks, distilleries, laundrettes, and bakeries.
6
Funding: £60M
My Energi makes Electric Vehicle charging equipment and eco-smart home devices.
My Energi makes Electric Vehicle charging equipment and eco-smart home devices.
7
Funding: £24M
3D vision and artificial intelligence applied to subsea robotics servicing offshore wind decommissioning
3D vision and artificial intelligence applied to subsea robotics servicing offshore wind decommissioning
8
Funding: £21.4M
QiO Technologies is an AI sustainability tech company that provides a sustainability suite to reduce greenhouse gas emissions.
QiO Technologies is an AI sustainability tech company that provides a sustainability suite to reduce greenhouse gas emissions.
9
Funding: £16.1M
Providing a data-driven energy platform, Modo Energy is emerging as one of the key players in optimising energy storage.
Providing a data-driven energy platform, Modo Energy is emerging as one of the key players in optimising energy storage.
10
Funding: £12.3M
Continuum Industries offers a cloud-based platform designed to accelerate and de-risk the development of new linear infrastructure projects, from concept to consent. They streamline optioneering for various infrastructure types, including electricity transmission, renewable energy, hydrogen, and water networks.
Continuum Industries offers a cloud-based platform designed to accelerate and de-risk the development of new linear infrastructure projects, from concept to consent. They streamline optioneering for various infrastructure types, including electricity transmission, renewable energy, hydrogen, and water networks.
11
Funding: $13.7M
Fuuse is innovating the charging infrastructure landscape by developing an operating system for organisations and their EV chargers, with a mission to eliminate barriers to EV adoption and accelerate the shift towards sustainable transportation.
Fuuse is innovating the charging infrastructure landscape by developing an operating system for organisations and their EV chargers, with a mission to eliminate barriers to EV adoption and accelerate the shift towards sustainable transportation.
12
Funding: £6.2M
Upside Energy reduces greenhouse gases by enabling people to make smart choices about when to use energy. It uses advanced algorithms and artificial intelligence to match energy demand with the available supply, helping the electricity grid deal with fluctuations and times of peak usage.
Upside Energy reduces greenhouse gases by enabling people to make smart choices about when to use energy. It uses advanced algorithms and artificial intelligence to match energy demand with the available supply, helping the electricity grid deal with fluctuations and times of peak usage.
13
Funding: £6m
OX delivers clean, affordable transport in emerging markets, creating a self-reinforcing cycle of economic growth and social impact.
OX delivers clean, affordable transport in emerging markets, creating a self-reinforcing cycle of economic growth and social impact.
14
Funding: £5.3M
Allotrope Energy is provides Lithium ion energy density with supercapacitor power.
Allotrope Energy is provides Lithium ion energy density with supercapacitor power.
15
Funding: £4.4M
Limejump’s Virtual Power Platform is an aggregation of flexible energy generation and storage assets of different sizes and technology types. They aim to deliver 100% renewable energy at all times to customers through the direct real-time connectivity between renewable energy sources, batteries and demand response.
Limejump’s Virtual Power Platform is an aggregation of flexible energy generation and storage assets of different sizes and technology types. They aim to deliver 100% renewable energy at all times to customers through the direct real-time connectivity between renewable energy sources, batteries and demand response.
16
Funding: £2.8M
Levistor has developed a unique, low-cost flywheel energy storage system that they are using to boost the grid for ultra-rapid EV charging (350kW).
Levistor has developed a unique, low-cost flywheel energy storage system that they are using to boost the grid for ultra-rapid EV charging (350kW).
17
Funding: £2.3M
Andersen develops and installs EV charge points that use industrial-grade electronics to match stunning design with enhanced performance and functionality.
Andersen develops and installs EV charge points that use industrial-grade electronics to match stunning design with enhanced performance and functionality.
19
Funding: $113.6M
Nyobolt is a developer of high-powered battery technology used to serve automotive applications.
Nyobolt is a developer of high-powered battery technology used to serve automotive applications.
20
Funding: £35M
Exagen Group is building the next generation of utility scale solar farms co-located with grid-balancing battery storage facilities.
Exagen Group is building the next generation of utility scale solar farms co-located with grid-balancing battery storage facilities.
