118 Best UK Energy & Nuclear Startups to Watch in 2023 | Seedtable

118 Energy & Nuclear Startups in UK to Watch in 2023

UK's Energy & Nuclear sector is booming. This year’s list of the best 118 UK Energy & Nuclear startups is an eclectic mix of hyper-growth scaleups, small creative startups and everything in between.

The last update was made on March 15, 2023.

Curated by @gonsanchezs

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BeZero Carbon

BeZero Carbon is here to build markets and environmental assets, starting with the Voluntary Carbon Market.

London   101 to 250   $50 Million   $2.8 Million  

Molten Ventures   Contrarian Ventures   Norrsken VC   Illuminate Financial   Extantia Capital  

B2B   SAAS  

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Altruistiq

Altruistiq provides a platform that enables enterprises to automate sustainability data measurement, management, and exchange.

London   11 to 50   $18 Million   $18 Million  

Molten Ventures   Norrsken VC  

B2B   SAAS  

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TrueCircle

TrueCircle is building a marketplace to support waste processing facilities in selling the verified material they reclaim.

London   11 to 50   $5.5 Million   $5.5 Million  

Lowercarbon Capital   Giant Ventures   Firstminute Capital   Passion Capital  

B2B   SAAS   MARKETPLACE  

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Cervest

Cervest is building an AI-first platform to help businesses, governments and growers adapt to climate volatility, and protect our planet.

London   11 to 50   $5.5 Million   $4.5 Million  

Lowercarbon Capital   Future Positive Capital   Molten Ventures   Astanor Ventures  

B2B   SAAS  

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Vortexa

Shaping the future of energy markets

London   51 to 100   $24 Million   $5 Million  

Notion Capital   Mosaic Ventures   Metaplanet Holdings  

B2B   SAAS  

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Puraffinity

Puraffinity develops precision materials to target chemicals, with an initial focus on PFAS in water

London   11 to 50   $7.4 Million   $3.6 Million  

Kindred Capital   Verve Ventures  

B2B  

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FabricNano

FabricNano is a cell-free biomanufacturing company that develops biocatalysts to unlock the future of biochemistry.

London   11 to 50   $16 Million   $3.3 Million  

Hoxton Ventures   Atomico   Entrepreneur First   BACKED VC  

B2B  

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Satellite Vu

Satellite Vu An Earth Observation and satellite imagery analytics company deriving insights into economic activity

London   1 to 10   $26 Million   $5 Million  

Molten Ventures   A/O PropTech  

B2B   SAAS  

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Nous

Nous is a software company that deals with household utilities.

London   11 to 50   $9 Million   $9 Million  

Mosaic Ventures  

B2B   B2C   SAAS   MARKETPLACE  

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Foodsteps

Foodsteps is a london-based startup that has developed a platform to help the food sector reduce its carbon footprint.

London   11 to 50   $4.8 Million   $4.1 Million  

Ascension Ventures   Octopus Ventures   Metaplanet Holdings  

B2B   SAAS  

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Sylvera

Sylvera develops machine learning-based tools to track the performance of carbon offsets.

London   101 to 250   $38 Million  

Seedcamp   Index Ventures   Local Globe   Insight Venture Partners   Speedinvest  

B2B   SAAS  

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Supercritical

Supercritical is a software platform that helps businesses reach carbon net zero and tackle the climate crisis.

London   1 to 10   $2.8 Million   $2.8 Million  

Local Globe  

B2B   SAAS  

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Shellworks

Shellworks is a biotech startup on a mission to make plastic waste a thing of the past.

London   1 to 10   $7.6 Million   $820 Thousand  

Local Globe   Atomico   Ascension Ventures   BoxGroup  

B2B  

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Octopus Energy

Octopus Energy builds technology that reduces the cost of energy to improve the customer experience.

London   1001 to 5000   $2.1 Billion   $250 Million  

B2B  

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Octopus Energy

Octopus Energy builds technology that reduces the cost of energy to improve the customer experience.

London   1001 to 5000   $2.1 Billion   $250 Million  

B2B  

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Britishvolt

Britishvolt will deliver sustainable, low-carbon batteries on the roadmap to decarbonisation

London   101 to 250   $2.4 Billion   $70 Million  

B2B  

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Newcleo

Newcleo, the futurable energy.

London   101 to 250   $430 Million   $120 Million  

B2B  

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Climate X

Climate X delivers climate risk-related ratings and asset level financial impacts for extreme weather events linked to climate change.

London   11 to 50   $7 Million   $1.5 Million  

Pale Blue Dot   Blue Impact Ventures   A/O PropTech   CommerzVentures  

B2B   SAAS  

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Greyparrot

AI-based computer vision solutions to power next generation robotics and smart systems for the waste management industry.

London   1 to 10   $3.6 Million   $1.5 Million  

Speedinvest   Plug and Play Spain   Force Over Mass Capital   Una Terra   360 Capital  

B2B  

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Highview Power

Manufacture Of Electricity Distribution And Control Apparatus

London   11 to 50   $62 Million   $46 Million  

B2B  

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Bonnet

The most user-friendly way to charge your car anywhere

London   1 to 10   $6.6 Million  

Lightspeed Venture Partners   APX   20VC   GV   Ascension Ventures  

B2B   B2C   MARKETPLACE  

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Bramble Energy

Bramble Energy is an innovator energy technology company that designs and manufactures high-performance, low-cost, and fuel cell stack

London   1 to 10   $6.5 Million   $6.3 Million  

Business Growth Fund   Parkwalk Advisors  

B2B  

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OpenSensors

OpenSensors is an internet of things company that builds a connected world that puts people first.

London   11 to 50   $4.1 Million   $4 Million  

Crane Venture Partners  

B2B   SAAS  

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Emitwise

Emitwise is an AI-powered carbon management platform that helps businesses in tracking and managing their carbon footprint.

London   11 to 50   $17 Million  

True Ventures   Outsized Ventures  

B2B   SAAS  

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Qualis Flow

Qflow is a cloud-based tool that automates the capture, digitisation and analysis live construction data.

London   11 to 50   $3.3 Million   $910 Thousand  

Entrepreneur First   Pi Labs   MMC Ventures  

B2B   SAAS  

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Itero

Itero creates profitable waste management solutions.

London   11 to 50   $6.1 Million   $6.1 Million  

B2B  

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Seabound

Seabound is a carbon capture technology company.

London   1 to 10   $4.4 Million  

Lowercarbon Capital   Y Combinator   Rebel Fund  

B2B   SAAS  

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Abatable

Abatable is the robo-advisor for high quality carbon offsetting.

London   1 to 10   $3.1 Million   $130 Thousand  

Y Combinator   Global Founders Capital (GFC)  

B2B   SAAS  

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Iduna

Iduna is an innovative car charging scheme.

London   1 to 10   $5.6 Million   $5.5 Million  

B2B   B2C  

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Cloud Cycle

A platform enabling concrete providers to manage concrete quality better, reduce waste, save money and slash CO2 emissions.

London   11 to 50   $6.6 Million   $150 Thousand  

Antler  

B2B   SAAS  

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Ecolibrium

ML technology to plan and operationalize Sustainability & Net Zero Carbon ambitions; balancing People, Planet & Profit.

London   51 to 100   $9.2 Million   $5 Million  

B2B  

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Iduna

Iduna is an innovative car charging scheme.

London   1 to 10   $5.6 Million   $5.5 Million  

B2B   B2C  

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Piclo

Piclo develop software to make our electricity grids smart, flexible and sustainable.

London   11 to 50   $11 Million   $6.6 Million  

B2B   MARKETPLACE  

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Piclo

Piclo develop software to make our electricity grids smart, flexible and sustainable.

London   11 to 50   $11 Million   $6.6 Million  

B2B   MARKETPLACE  

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Polymateria

Polymateria is a London-based startup advancing science to help nature deal with plastic pollution.

London   11 to 50   $19 Million   $19 Million  

B2B  

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WeVee

WeVee is a fully integrated electric vehicle price comparison and leasing platform.

London   51 to 100   $9.1 Million   $6.9 Million  

B2C  

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Nexeon

Nexeon is an electronics company that develops and manufactures lithium-ion batteries to reduce carbon anode energy inefficiency.

Abingdon   51 to 100   $330 Million   $80 Million  

B2B  

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PlanetWatchers

PlanetWatchers is a geospatial intelligence and enterprise natural resource monitoring service.

London   11 to 50   $18 Million   $3.5 Million  

B2B   SAAS  

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Plastic Energy

Plastic Energy offers a global and sustainable solution to prevent plastic pollution.

London   51 to 100   $170 Million  

B2B  

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Breathe Battery Technologies

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

London   1 to 10   $2 Million   $2 Million  

Speedinvest  

B2B   SAAS  

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Bright

Bright is an online recruitment network that connects graduates, undergraduates and professionals with suitable job opportunities.

London   1 to 10   $7.8 Million   $3.7 Million  

B2B   SAAS  

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Breathe Battery Technologies

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

London   1 to 10   $2 Million   $2 Million  

Speedinvest  

B2B   SAAS  

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Ionate

IONATE is a technology company developing next-generation Hybrid Intelligent Transformers.

London   1 to 10   $4 Million   $4 Million  

IQ Capital Partners  

B2B  

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Ionate

IONATE is a technology company developing next-generation Hybrid Intelligent Transformers.

London   1 to 10   $4 Million   $4 Million  

IQ Capital Partners  

B2B  

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Faradai

AI powered Enterprise Net Zero Intelligence Platform - Helping enterprises to digitize and accelerate their net zero journey

London   51 to 100   $3.9 Million   $1 Million  

Sangha Capital  

B2B   SAAS  

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Econic Technologies

Econic Technologies develops new catalysts and processes for the manufacture of polymers from CO2.

London   11 to 50   $47 Million  

B2B  

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Altroleum

Software for the energy transition

London   1 to 10   $0   $100 Thousand  

Entrepreneur First   Ascension Ventures  

B2B   SAAS  

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Standard Gas

Standard Gas produce a high quality synthetic gas from a wide range of non recyclable waste feedstock.

London   11 to 50   $3 Million   $3 Million  

B2B  

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Solivus

Powering mega-buildings and homes with clean energy generated on-site using new thin-film solar, overcoming weight and aesthetic challenges.

London   11 to 50   $8.3 Million   $3.3 Million  

B2B  

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Morrow

React Native apps for pioneering businesses.

Bristol   1 to 10   $0   $26 Million  

B2B  

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Greenpixie

Greenpixie measures and understands cloud emissions and provides the tools to demystify the environmental impact of cloud computing.

London   1 to 10   $300 Thousand   $300 Thousand  

Ascension Ventures  

B2B   SAAS  

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Carbon Clean Solutions

Carbon Clean Solutions develops CO2 separation technology for industrial and gas treating applications.

London   11 to 50   $56 Million  

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EcoHedge

EcoHedge was founded to empower every company with the tools they need to become a leader in the fight against climate change.

London   11 to 50   $480 Thousand   $490 Thousand  

B2B   SAAS  

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Thallo

Thallo uses blockchain technology to revolutionize and democratize the way individuals and businesses buy, sell and trade carbon offsets.

London   1 to 10   $2.5 Million   $2.5 Million  

B2B   MARKETPLACE  

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Hometree

Hometree exists to make home ownership simple & sustainable

London   51 to 100   $24 Million  

DN Capital   Anthemis  

B2B   B2C   MARKETPLACE  

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Zeplug

Zeplug offers charging solutions for electric vehicles along with maintenance services.

Cambridge   51 to 100   $0   $6 Million  

B2B   B2C  

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Nyobolt

Nyobolt is a developer of high-powered battery technology used to serve automotive applications.

Cambridge   11 to 50   $84 Million   $10 Million  

IQ Capital Partners  

B2B  

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Simply Blue Group

Simply Blue Group is a marine project developer focused on floating wind initiatives.

Cork   101 to 250   $0   $28 Million  

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BOXT

BOXT is involved in the supply and installation of boilers, air conditioning and electric vehicle chargers through the online store.

Leeds   11 to 50   $22 Million   $27 Million  

B2C  

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Expect

Expect is the decarbonisation management platform for large enterprises and heavy industries.

London   11 to 50   $870 Thousand   $870 Thousand  

B2B   SAAS  

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Moixa Energy Holdings

Pioneer of energy storage, DC micro-grid power and aggregate electricity grid services in the UK

London   11 to 50   $22 Million  

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Hypetex

Hypetex manufactures coloured carbon fibre using sustainable colourisation materials.

London   11 to 50   $1.8 Million   $1.5 Million  

B2B  

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Skrap

B2B Marketplace for construction waste, bulky materials and equipment hire.

London   11 to 50   $2.9 Million   $1.6 Million  

MARKETPLACE  

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WASE

WASE provides a decentralized sanitation system with the goal of accelerating the global adoption of circular waste treatment.

London   1 to 10   $920 Thousand   $1.3 Million  

B2B  

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ev.energy

Ev.energy is a smart charging software platform for electric vehicles to reduce carbon emissions and costs.

London   11 to 50   $14 Million  

Future Energy Ventures   Energy Impact Partners  

B2B   SAAS  

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Brill Power

Brill Power is a clean-tech platform that develops cutting-edge battery management technology.

Oxford   11 to 50   $11 Million   $11 Million  

Oxford Science Enterprises  

B2B  

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Oxwash

Oxwash is a provider of sustainable on-demand laundry and wet and dry cleaning services for all.

Oxford   51 to 100   $19 Million   $1.7 Million  

Ascension Ventures   TrueSight Ventures  

B2B   B2C  

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Brill Power

Brill Power is a clean-tech platform that develops cutting-edge battery management technology.

Oxford   11 to 50   $11 Million   $11 Million  

Oxford Science Enterprises  

B2B  

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Barocal

Barocal is a Zero-carbon refrigeration.

London   1 to 10   $1.8 Million   $1.8 Million  

B2B  

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eleXsys Energy

eleXsys Energy operates as a cleantech energy company.

London   51 to 100   $910 Thousand   $910 Thousand  

B2B  

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PF Nexus

Renewable energy & infrastructure deal origination platform

London   1 to 10   $700 Thousand  

Charlotte Street Capital  

B2B   MARKETPLACE  

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PF Nexus

Renewable energy & infrastructure deal origination platform

London   1 to 10   $700 Thousand  

Charlotte Street Capital  

B2B   MARKETPLACE  

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Naked Energy

Naked Energy has developed an innovative hybrid solar technology generating combined heat and power.

London   1 to 10   $0   $1.2 Million  

Nesta  

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Rightcharge

Rightcharge is the UK’s comparison site for electric car charging

London   1 to 10   $930 Thousand   $930 Thousand  

Link Venture Capital  

B2B   B2C   MARKETPLACE  

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Ripple Energy

Ripple Energy is to make clean energy ownership affordable and accessible for everyone.

London   11 to 50   $1.4 Million   $1.1 Million  

B2B  

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Ripple Energy

Ripple Energy is to make clean energy ownership affordable and accessible for everyone.

London   11 to 50   $1.4 Million   $1.1 Million  

B2B  

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BirdsEyeView

InsurTech, Managing General Agent, Satellite-Data, Parametric Insurance, Climate-Change Risks

London   1 to 10   $490 Thousand   $320 Thousand  

B2B  

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eleXsys Energy

eleXsys Energy operates as a cleantech energy company.

London   51 to 100   $910 Thousand   $910 Thousand  

B2B  

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Treepoints

Treepoints is a certified social enterprise company.

London   1 to 10   $200 Thousand   $200 Thousand  

Charlotte Street Capital  

B2B  

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Airex

Airex is a smart ventilation control that builds intelligent air ventilation units using atmospheric sensors and cloud algorithms.

London   1 to 10   $740 Thousand   $640 Thousand  

B2B  

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Heimdal

Heimdal is developing profitable direct air carbon capture engineering.

Oxford   1 to 10   $11 Million   $6.4 Million  

Y Combinator   Metaplanet Holdings  

B2B  

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Heimdal

Heimdal is developing profitable direct air carbon capture engineering.

Oxford   1 to 10   $11 Million   $6.4 Million  

Y Combinator   Metaplanet Holdings  

B2B  

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CorrosionRADAR

Smarter infrastructure using Industrial Internet of Things and Predictive Analytics

Cambridge   11 to 50   $6.2 Million   $7 Million  

B2B  

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i6 Group

i6 is a provider of a digital fuel management platform to connect stakeholders across all stages of the aircraft refueling process.

London   51 to 100   $0  

B2B   SAAS  

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CORE-POWER (UK) Ltd

Atomic batteries' based on the Molten Salt Reactor - a game changer for ocean transportation

London   1 to 10   $4.3 Million  

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Diode

Electric vehicle suitability, infrastructure recommendations, and charge point procurement for businesses of all shapes and sizes.

London     $190 Thousand  

NorthInvest   Haatch  

B2B  

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Xampla

Xampla creates plant protein material for commercial use.

Cambridge   1 to 10   $12 Million   $2.5 Million  

Amadeus Capital   Parkwalk Advisors  

B2B  

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Aceleron

Aceleron is an innovative UK-based advanced lithium battery developer aiming to accelerate the global shift to cleaner.

Birmingham   11 to 50   $2.8 Million   $2.5 Million  

Business Growth Fund  

B2B  

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Connected Energy

A pioneer of 2nd life electric vehicle battery based energy storage systems.

Newcastle   11 to 50   $31 Million   $820 Thousand  

B2B  

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Connected Energy

A pioneer of 2nd life electric vehicle battery based energy storage systems.

Newcastle   11 to 50   $31 Million   $820 Thousand  

B2B  

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Modo Energy

Modo Energy is an energy asset analysis platform that provides users with data, research and benchmarking tools for energy storage.

Birmingham   11 to 50   $3.9 Million   $3.9 Million  

Triple Point Ventures  

B2B   SAAS  

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Modo Energy

Modo Energy is an energy asset analysis platform that provides users with data, research and benchmarking tools for energy storage.

Birmingham   11 to 50   $3.9 Million   $3.9 Million  

Triple Point Ventures  

B2B   SAAS  

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LiNa Energy

LiNa Energy is commercialising a safe, cobalt and lithium free solid-state sodium battery.

Lancaster   11 to 50   $8.2 Million   $4.8 Million  

B2B  

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Impact Recycling

Impact Recycling has developed a breakthrough plastic recycling technology which separates the components of mixed plastic waste.

Newcastle   1 to 10   $5.8 Million   $2.6 Million  

B2B  

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Connected Energy

A pioneer of 2nd life electric vehicle battery based energy storage systems.

Newcastle   11 to 50   $31 Million   $820 Thousand  

B2B  

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Azuri Technologies

Azuri brings affordable solar power to off-grid rural africans.

Cambridge   101 to 250   $54 Million  

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Cheesecake Energy

Cheesecake Energy is developing advanced thermal and compressed air energy systems to store energy.

Nottingham   1 to 10   $1.5 Million   $1.4 Million  

Business Growth Fund   Parkwalk Advisors  

B2B  

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Perceptual Robotics

Perceptual Robotics is creating intelligent automation to make wind turbine and other infrastructure inspection simple and fast

Bristol   1 to 10   $1.5 Million   $2.2 Million  

B2B  

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Legacy

Legacy is a digital fertility clinic for men, founded at Harvard & backed by Y Combinator, FirstMark Capital, Bain Capital and celebrities.

Cambridge   101 to 250   $45 Million  

B2B   SAAS  

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Echion Technologies

Echion Technologies develops superfast-charging Li-ion batteries

Cambridge   1 to 10   $18 Million   $2 Million  

Parkwalk Advisors  

B2B  

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Anaphite

Advanced materials development and manufacture for Li-ion Battery electrodes

Bristol   11 to 50   $9 Million   $540 Thousand  

B2B  

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Reactive Technologies

Reactive Technologies delivers the world’s most accurate grid measurement tools, making renewable grids possible.

Oxford   11 to 50   $15 Million  

Breakthrough Energy Ventures   Business Growth Fund  

B2B  

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Reactive Technologies

Reactive Technologies delivers the world’s most accurate grid measurement tools, making renewable grids possible.

Oxford   11 to 50   $15 Million  

Breakthrough Energy Ventures   Business Growth Fund  

B2B  

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EcoSync

EcoSync offers an intelligent platform which helps commercial buildings to stop heating empty rooms and reduce energy consumption by 30-50%

Oxford   1 to 10   $2.9 Million  

B2B   SAAS  

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Tribosonics

Tribosonics is a transformational technology business taking its unique sensing technologies into uncharted and valuable territories.

Sheffield   11 to 50   $3.3 Million   $1.9 Million  

B2B  

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The Bunch

The Bunch is a bill sharing service handling the set-up and management of utilities payments.

Bristol   11 to 50   $1.3 Million   $190 Thousand  

Haatch   Pario Ventures  

B2B   B2C   FREEMIUM   MARKETPLACE  

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ChangeOver Technologies

ChangeOver Technologies develops tailored technology that will clean up legacy waste and reduce CO2.

Belfast   1 to 10   $0   $640 Thousand  

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SteamaCo

SteamaCo enables utilities to sell energy anywhere on the planet.

Manchester   11 to 50   $8.9 Million  

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Green Energy Options

Green Energy Options designs and produces in-home energy displays, online energy services, and mobile applications.

Cambridge   51 to 100   $7.8 Million  

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Rovco

3D vision and artificial intelligence applied to subsea robotics servicing offshore wind & oil decommissioning

Bristol   11 to 50   $12 Million  

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Cquestr8

Cquestr8 is an accelerated weathering company that helps decarbonize cement, lime and steel production and reduce ocean acidification.

Durham   1 to 10   $300 Thousand   $300 Thousand  

B2B  

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InferSens

InferSens is building breakthrough Tiny ML water sensors enabling real-time and fully comprehensive monitoring of water infrastructures.

Cambridge   1 to 10   $1.1 Million   $1.1 Million  

B2B  

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Grid Edge

Grid Edge offers artificial intelligence, energy optimisation, and building energy management services.

Birmingham   11 to 50   $2.9 Million  

B2B   SAAS  

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Grid Edge

Grid Edge offers artificial intelligence, energy optimisation, and building energy management services.

Birmingham   11 to 50   $2.9 Million  

B2B   SAAS  

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Green Hydrogen

Green Hydrogen / GH2 Fuels, GH2 Energy and GH2 Systems

Cardiff   11 to 50   $0  

Nordic Alpha Partners  

B2B  

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Entomics

Entomics is a biotechnology platform that transforms food waste into sustainable, renewable resources with the use of insects.

Cambridge   1 to 10   $2.8 Million  

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Green Hydrogen

Green Hydrogen / GH2 Fuels, GH2 Energy and GH2 Systems

Cardiff   11 to 50   $0  

Nordic Alpha Partners  

B2B  

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Ovon Home

We create stylish home automation, IoT devices that save energy and improve comfort. Globally active through Ovon Home and Ovon Technology.

Manchester   1 to 10   $830 Thousand  

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Berlin Startups

In Berlin, a new startup is founded every 20 minutes. What else is there to say?

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Paris Startups

Under President Macron's new regime, the Paris start-up scene is flying higher than ever before.