24 Best Energy Nuclear Startups in Uk to Watch in 2025

The Definitive Seedtable Ranking of Energy Nuclear 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 24 start-ups with an aggregate funding of $732.3m. The average funding per company in this subset is $30.5m.

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

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1

Funding Rounds

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

9

Funding Rounds

$138.9m

Money raised

SkySpecs is a company founded in 2012 by Daniel Ellis.

1

Funding Rounds

$7.2m

Money raised

A financial technology company offering a household bill payment platform.

1

Funding Rounds

$4.0m

Money raised

Engergi Mine is a reward platform that is designed to help reduce global energy demand.

2

Funding Rounds

$930.0k

Money raised

Energy management rewards app for consumers to turn off appliances during peak usage times.

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:

7

Funding Rounds

$24.5m

Money raised

Invinity Energy Systems is a vanadium flow battery company.

1

Funding Rounds

$4.5m

Money raised

Faradion Limited is a manufacuturer of eergy storage technologies.

2

Funding Rounds

$15.3m

Money raised

Hyperdrive designs and develops lithium-ion battery systems.

5

Funding Rounds

$41.2m

Money raised

Ilika is developing solid-state battery technology solutions for applications in IIoT, MedTech, Electric Vehicles, and Consumer Electronics.

3

Funding Rounds

$5.8m

Money raised

Abundance Investment is a United Kingdom-based company founded in 2009 by Bruce Davis, Karl Harder and Louise Wilson.

8

Funding Rounds

$3.6m

Money raised

Petalite is offering EV charging solutions to energy companies, charge point operators, and fleet management companies to help maximize their ROI potential and provide a competitive and reliable charging service for EV drivers.

1

Funding Rounds

Simple public electric vehicle charging with an electric fuel card & mobile app for business

2

Funding Rounds

$64.0m

Money raised

Exergyn is a CLEANER WORLD powered by Exergyn founded in 2012 by Alan Healy.

Key people:

7

Funding Rounds

$25.6m

Money raised

ZapGo Ltd. is a company founded in Oxford, UK.

8

Funding Rounds

$225.0m

Money raised

Urban Volt is an energy-saving LED and solar panel manufacturer founded in 2015.

1

Funding Rounds

$864.0k

Money raised

Wattics is a Dublin-based developer of a business intelligence and energy management software platform.

3

Funding Rounds

$1.4m

Money raised

SolarforSchools is a company founded in 2015 by Robert Schrimpff.

Key people:

1

Funding Rounds

$1.2m

Money raised

Storelectric is a developer of projects using two highly efficient forms of Compressed Air Energy Storage.

Key people:

4

Funding Rounds

$401.7k

Money raised

SMAP Energy is a company founded in 2016.

2

Funding Rounds

$121.0m

Money raised

TechMet is a private industrial company that invests in securing the supply of the key metals critical to the manufacturing of EVs, Energy Storage, and Renewable Energy technologies. TechMet currently holds interests in both production and development assets in Africa, North America, and South America.

3

Funding Rounds

$1.6m

Money raised

Quimera Energy Efficiency is a company founded in 2015.

1

Funding Rounds

$1.5m

Money raised

Porpoise Power is a developer of tidal energy technology founded in 2024 by John Kennedy, Adrian Thomas, Hilary Struthers and Martin Hall.

Key people:

1

Funding Rounds

$3.4m

Money raised

Manufacturer of high-value materials utilizing greenhouse gas emissions.

Key people:

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