Radar · Energy Efficiency Tech in United Kingdom
Best Energy Efficiency Tech Companies in United Kingdom
The 627 best Energy Efficiency Tech companies in United Kingdom in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Hometree.
By Riya SenguptaFinancials
627companies tracked
$2Bdisclosed funding
3unicorns
173have raised
Ranked by disclosed equity funding and recent momentum, this directory maps 627 Energy Efficiency Tech companies operating across the United Kingdom, from seed-stage startups to three unicorns pulling serious capital. Total disclosed funding sits at $2.0B across the tracked cohort. That's a real number, not a projection.
Hometree leads the disclosed stack at $268M, followed by Kraken at $150M and Iceotope at $46M. So the top three alone account for a meaningful chunk of that pool, which tells you where institutional conviction is concentrating. As shown in 2018 research on clean energy transitions, deployment economics matter as much as the underlying technology, and that pattern holds here. Median install growth across energy apps is running at roughly +28% YoY across 138 tracked applications, which isn't noise. Hot coverage themes include EV battery technology, solar electricity generation, and next-generation EV platforms. I'd watch the EV powertrain segment especially, given how quickly battery economics are compressing. Backers like Mercia, Europa, and the Low Carbon Innovation Fund are the names showing up repeatedly, and their presence tends to signal which corners of this market have cleared the due-diligence bar.
FLIAR INTELLIGENCE · ENERGY EFFICIENCY TECH × UNITED KINGDOM
Our analysis of 50 Energy Efficiency Tech companies
$7.8b in tracked funding; 86% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
50companies analysed
86%cloud-native stacks
2025funding peak (by rounds)
4unicorns
2014median founding year
193kcombined LinkedIn audience
30%of audience held by top 3
5companies hiring publicly (12 mo)
Ranked: Best Energy Efficiency Tech companies in United Kingdom
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Stage | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Hometree Provider of an online platform for home insurance 62Funding top 24%Product top 25%Growth top 27%Tech top 28% All 10 signals ▾Fundingtop 24% Producttop 25% Growthtop 27% Techtop 28% Innovationtop 39% Moattop 39% Talentbottom 49% Globalbottom 39% Marketbottom 34% Newsbottom 21% Funding: Raised $268M across 12 rounds · 12 rounds over 10 yrs (1.2/yr) Product: 12 distinct product lines · Company stage: Series C rank vs industry peers · Fliar Intelligence Index 62/100 | $268M | 20 mo ago | 59 59 → 130 (+120%) · sector median +32% | Simon Phelan Co-Founder & CEO | Cart FunctionalitySentryZendesk+27 | Series C | — | 1 partnership |
| 2 | OVO Energy Provider of electricity and gas supply services for residential properties | $258M | 34 mo ago | 1,115 | Stephen Fitzpatrick Founder | Apple iCloud MailGoogle WorkspaceAlgolia+22 | Acquired | — | — |
| 3 | Deep Green 🦄 Provider of environmental consultancy and carbon neutral services | $255M | 30 mo ago | 4 | — | WordPressMySQLPHP+27 | Series D | — | 1 partnership · 1 expansion |
| 4 | Open Energi Provider of AI and cloud-based load management systems 24Moat top 32%Product top 37%Innovation top 40%Funding top 41% All 10 signals ▾Moattop 32% Producttop 37% Innovationtop 40% Fundingtop 41% Patentstop 45% Growthbottom 42% Globalbottom 40% Marketbottom 37% Techbottom 29% Fin. healthbottom 26% Moat: Editorial + unicorn rating 5/10 · IP moat: 56 patents Product: 0 product launch events in 12 mo · 7 distinct product lines rank vs industry peers · Fliar Intelligence Index 24/100 | $167M | 115 mo ago | 26 | — | — | Acquired | 56 patents Smart grid control and battery storage management for electrical loads and components | — |
| 5 | Kraken Provider of utility management solution 83Funding top 22%Fin. health top 23%Tech top 32%Growth top 33% All 9 signals ▾Fundingtop 22% Fin. healthtop 23% Techtop 32% Growthtop 33% Talenttop 38% Markettop 41% AItop 45% Globalbottom 39% Moatbottom 38% Funding: Raised $150M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) Fin. health: Revenue ~$171M · Revenue 1.1x total funding rank vs industry peers · Fliar Intelligence Index 83/100 | $150M | 5 mo ago | 376 | Matthew Potts Co-Founder | StoryblokTurbopackstyled-components+23 | Series D | — | — |
| 6 | Infogrid SaaS, IoT & AI-driven smart building management solution 78Growth top 8%Moat top 22%Global top 24%Funding top 32% All 9 signals ▾Growthtop 8% Moattop 22% Globaltop 24% Fundingtop 32% Markettop 43% AItop 45% Talentbottom 45% Fin. healthbottom 38% Newsbottom 27% Growth: Headcount 5 → 61 (+1120%) across vintages Moat: Editorial + unicorn rating 8/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 78/100 | $120M | 25 mo ago | 61 | William Cowell De Gruchy Founder & CEO | — | Series B | — | — |
| 7 | EkkoSense Data center infrastructure and energy management software provider | $51M | 61 mo ago | 30 30 → 68 (+127%) · sector median +32% | Dean Boyle Co-Founder & CEO | WordPress Block EditorWordPressMySQL+35 | Series C | 23 patents Real‑time monitoring and AI‑driven optimization of data‑center cooling and HVAC systems | — |
| 8 | Iceotope Manufacturer of precision liquid cooling systems for computer hardware components 53Innovation top 12%Patents top 13%Moat top 26%Funding top 30% All 12 signals ▾Innovationtop 12% Patentstop 13% Moattop 26% Fundingtop 30% Talenttop 38% Techtop 49% Producttop 49% Globaltop 50% Marketbottom 46% Growthbottom 37% Fin. healthbottom 23% Newsbottom 21% Innovation: 175 patents (top 9% of patent-holders) · 119 filings since 2022 vs 38 in 2017-21 Patents: 175 patents matched (strict assignee match) · 119 filings since 2022 vs 38 in 2017-21 rank vs industry peers · Fliar Intelligence Index 53/100 | $46M | 1 mo ago | 114 114 → 61 (-46%) · sector median +32% | David Craig Co-CEO | WebflowGSAPLinkedin Insight Tag+14 | Series B | 175 patents Liquid immersion cooling systems and components for high‑performance electronic thermal management | 1 award |
| 9 | Heliex Power Waste heat and steam to clean electricity | $42M | 43 mo ago | 25 | Carol Daniel | — | Deadpooled | — | — |
| 10 | Love Energy Savings Online platform offering utility comparison and switching solutions | $39M | 93 mo ago | 283 283 → 196 (-31%) · sector median +32% | Phil Foster Founder & CEO | Apple iCloud MailMicrosoft 365Bootstrap+23 | Series B | — | 1 partnership |
| 11 | myenergi Manufacturer of eco-smart home energy management and electric vehicle charging products | $37M | 32 mo ago | 273 273 → 177 (-35%) · sector median +32% | Lee Sutton Co-Founder & CPO | Cart FunctionalityWooCommerceWordPress+35 | Series C | 38 patents Smart EV charging and grid‑connected power management, focusing on phase balancing and auxiliary battery control. | 1 expansion |
| 12 | Sunamp Manufacturer of thermal energy storage solutions for homes and buildings | $30M | 42 mo ago | 54 54 → 68 (+26%) · sector median +32% | Susan Lang-bissell Co-Founder & COO | WordPressMySQLPHP+32 | Series B | 199 patents Thermal energy storage using advanced phase‑change materials and nucleation additives. | — |
| 13 | MicroEmissive Displays Group Polymer organic light emitting diode technology provider | $23M | 225 mo ago | 38 | Bill Campbell ex-CEO | — | Deadpooled | 34 patents Pixel driving circuits and manufacturing processes for micro‑emissive OLED displays. | — |
| 14 | Mixergy Provider of app-based residential heat storage solution 53Moat top 25%Innovation top 28%Patents top 29%Product top 29% All 10 signals ▾Moattop 25% Innovationtop 28% Patentstop 29% Producttop 29% Growthtop 31% Fundingtop 38% Techtop 44% Globalbottom 40% Marketbottom 23% Newsbottom 18% Moat: Editorial + unicorn rating 7/10 · IP moat: 70 patents Innovation: 70 patents (top 47% of patent-holders) · 55 filings since 2022 vs 15 in 2017-21 rank vs industry peers · Fliar Intelligence Index 53/100 | $22M | 15 mo ago | 32 32 → 51 (+59%) · sector median +32% | — | WordPressApple iCloud MailMicrosoft 365+25 | Series C | 70 patents Efficient water heating and heat‑pump energy buffering systems for residential/commercial use | 1 award |
| 15 | Switchee 🦄 Provider of smart thermostat devices and data-driven insights for housing 45Talent top 28%Moat top 31%Funding top 38%Growth top 45% All 11 signals ▾Talenttop 28% Moattop 31% Fundingtop 38% Growthtop 45% Producttop 46% Techtop 48% Marketbottom 43% Globalbottom 42% Innovationbottom 37% Patentsbottom 32% Newsbottom 18% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Moat: Editorial + unicorn rating 7/10 · IP moat: 5 patents rank vs industry peers · Fliar Intelligence Index 45/100 | $20M | 23 mo ago | 23 | Ed Warrick Co-Founder | WordPressMySQLPHP+25 | Series A | 5 patents Building energy management systems for automated control of power-consuming devices | — |
| 16 | 4energy Provider of cooling products and software solutions | $20M | 141 mo ago | 5 | Patrick Tindale Founder & CEO | — | Series B | 71 patents Industrial air filtration and ventilation systems for equipment and environmental control | — |
| 17 | Camfridge Provider of energy-efficient magnetic cooling products | $18M | 109 mo ago | 6 | Neil Wilson Founder & CEO | WordPressMySQLPHP+11 | Series B | 19 patents Advanced multi-material blades for solid-state magnetocaloric/electrocaloric heat engines | — |
| 18 | Verv AI-driven energy monitoring solution for homes 48Funding top 29%Growth top 35%Tech top 36%AI top 45% All 8 signals ▾Fundingtop 29% Growthtop 35% Techtop 36% AItop 45% Talentbottom 49% Productbottom 48% Globalbottom 39% Marketbottom 18% Funding: Raised $17.7M across 15 rounds · 15 rounds over 11 yrs (1.4/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 48/100 | $18M | 8 mo ago | 5 | Peter Davies Founder & CEO | Cart FunctionalitySquarespace CommerceSquarespace+21 | Series A | — | 1 job opening |
| 19 | Tepeo Provider of heating management solutions | $16M | 42 mo ago | 21 21 → 29 (+38%) · sector median +32% | Johan Du Plessis Founder & CEO | WordPressMySQLPHP+29 | Series A | 20 patents Thermal energy storage and control technologies for residential/commercial heating systems. | — |
| 20 | Utopi Provider of SaaS platform to manage smart buildings 35Funding top 36%Tech bottom 49%Talent bottom 49%Market bottom 42% All 7 signals ▾Fundingtop 36% Techbottom 49% Talentbottom 49% Marketbottom 42% Productbottom 40% Newsbottom 32% Globalbottom 32% Funding: Raised $13.0M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) Tech: 23 technologies across 3/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 35/100 | $13M | 11 mo ago | 52 | Jonathan Burridge Founder & CEO | WordPressZohoMySQL+20 | Seed | — | 2 launchs |
| 21 | Igloo Energy Provider of energy monitoring solutions | $12M | 72 mo ago | 68 | — | — | Acquired | — | — |
| 22 | Sure Chill Develops a refrigeration system for use with intermittent power | $12M | 87 mo ago | 26 | Peter Saunders Co-Founder | — | Series A | 84 patents Portable refrigeration and cooling systems for mobile and on‑site applications | — |
| 23 | Measurable.energy Provider of appliance-level energy control using AI to eliminate wasted energy 13Funding top 43%Talent bottom 49%Global bottom 39%Market bottom 21% All 4 signals ▾Fundingtop 43% Talentbottom 49% Globalbottom 39% Marketbottom 21% Funding: Raised $10.6M across 2 rounds · 2 rounds over 3 yrs (0.7/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 13/100 | $11M | 19 mo ago | 4 | Dan Williams CEO & Co-Founder | — | Series A | — | — |
| 24 | Magnomatics Manufacturer of energy-efficient motors and magnetic gear systems | $10M | 67 mo ago | 25 | Gary Rodgers CEO | Wix eCommerceWixSentry+12 | Series A | 188 patents Magnetic gear and coupler systems for power transmission and drive control | 2 expansions |
| 25 | Albotherm Developer of temperature-responsive coatings for temperature regulation in buildings and greenhouses | $9M | 19 mo ago | 4 | — | Squarespace CommerceSquarespaceTypeScript+16 | Seed | 6 patents Encapsulation of phase‑change materials for thermal energy storage | 1 partnership · 1 expansion |
| 26 | Tribosonics Developer of sensing technology for industrial asset performance monitoring and management | $7M | 30 mo ago | 18 18 → 29 (+61%) · sector median +32% | Glenn Fletcher Co-CEO | WordPressMySQLPHP+29 | Seed | 58 patents Ultrasonic and acoustic sensors for fluid path fault detection and mixture monitoring | — |
| 27 | Metrikus Provider of building analytical solutions 19Talent bottom 49%Funding bottom 46%News bottom 41%Global bottom 39% All 5 signals ▾Talentbottom 49% Fundingbottom 46% Newsbottom 41% Globalbottom 39% Marketbottom 35% Talent: 1 named leader on record · 1 C-suite/founder profile curated Funding: Raised $6.7M across 2 rounds · 2 rounds over 6 yrs (0.3/yr) rank vs industry peers · Fliar Intelligence Index 19/100 | $7M | 10 mo ago | 27 27 → 18 (-33%) · sector median +32% | Gary Cottle Co-Founder & CEO | — | Series A | — | — |
| 28 | UrbanChain Developer of technology facilitating direct energy transactions between generators and consumers | $7M | 36 mo ago | 7 | Mo Hajhashem Co-Founder | Tailwind CSSVercelAmazon Web Services+14 | Series A | — | 1 job opening · 1 partnership |
| 29 | Ogre Provider of AI-powered platform for energy forecasting and management solutions 40AI top 25%Tech top 37%Growth top 45%Funding top 47% All 8 signals ▾AItop 25% Techtop 37% Growthtop 45% Fundingtop 47% Talentbottom 49% Globalbottom 39% Marketbottom 18% Newsbottom 18% AI: Product described with: ai-powered, artificial intelligence, machine learning Tech: 34 technologies across 4/8 capability areas · Cloud: Amazon Web Services, Cloudflare rank vs industry peers · Fliar Intelligence Index 40/100 | $6M | 21 mo ago | 2 | Matei Stratan Founder & CEO | DatoCMSNode.jsTailwind CSS+19 | Series A | — | 1 expansion · 1 award |
| 30 | Future Intelligence Provider of a network management platform for IoT applications | $6M | 41 mo ago | — | Nikolaos Zotos Co-Founder & CEO | — | Funding Raised | — | — |
| 31 | Heat Geek Network of installers providing heat pump installation and related services 45Tech top 29%Growth top 35%Talent bottom 49%Funding bottom 44% All 6 signals ▾Techtop 29% Growthtop 35% Talentbottom 49% Fundingbottom 44% Globalbottom 37% Marketbottom 34% Tech: 61 technologies across 5/8 capability areas · Cloud: Cloudflare, Google Cloud Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 45/100 | $5M | 3 mo ago | — | Adam Chapman Founder | PythonTailwind CSSFlowbite+24 | Seed | — | — |
| 32 | Bloemteknik Provider of precision LED lighting solutions and autonomous control systems 24Product top 47%Talent bottom 49%Global bottom 45%Funding bottom 44% All 4 signals ▾Producttop 47% Talentbottom 49% Globalbottom 45% Fundingbottom 44% Product: 2 published apps (30 installs) · Company stage: Series A Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 24/100 | $3M | 5 mo ago | — | James Fleet Co-Founder & CEO | — | Series A | — | — |
| 33 | Elyos Energy Platform offering solutions for energy management | $3M | 32 mo ago | — | Adrian Johnston Co-Founder & CEO | — | Seed | — | — |
| 34 | Grid Edge Provider of SaaS and AI-driven energy management solutions for commercial applications 37Moat top 38%Growth top 39%AI top 45%Talent top 45% All 11 signals ▾Moattop 38% Growthtop 39% AItop 45% Talenttop 45% Fundingbottom 49% Patentsbottom 47% Globalbottom 40% Innovationbottom 37% Marketbottom 35% Techbottom 35% Newsbottom 20% Moat: Editorial + unicorn rating 5/10 · IP moat: 15 patents Growth: Headcount 28 → 33 (+18%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 37/100 | $3M | 14 mo ago | 33 33 → 41 (+24%) · sector median +32% | Jim Scott Co-Founder & CPO | HubSpot CMS HubBootstrapHubSpot+12 | Series A | 15 patents Smart grid and building energy management software for demand response and load optimization | — |
| 35 | xWatts Provider of energy management solutions for education, healthcare, industrial, and real estate 14Talent top 38%Funding top 44%Moat top 48%Tech bottom 45% All 6 signals ▾Talenttop 38% Fundingtop 44% Moattop 48% Techbottom 45% Globalbottom 37% Marketbottom 15% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Funding: Raised $2.7M across 4 rounds · 4 rounds over 3 yrs (1.3/yr) rank vs industry peers · Fliar Intelligence Index 14/100 | $3M | 4 mo ago | 2 | Alexander Allen Co-Founder & CPO | WebflowGSAPHubSpot+14 | Seed | — | — |
| 36 | Heatio Renewable energy management and monitoring system | $3M | 23 mo ago | — | Thomas Farquhar Co-Founder | Wix eCommerceWixSentry+21 | Seed | — | — |
| 37 | LAIIER Provider of cloud-based smart buildings solutions 35Growth top 35%Innovation top 46%Patents top 46%Funding top 47% All 9 signals ▾Growthtop 35% Innovationtop 46% Patentstop 46% Fundingtop 47% Talentbottom 49% Techbottom 42% Moatbottom 42% Globalbottom 36% Marketbottom 25% Growth: Fresh capital in last 24 mo Innovation: 5 patents (top 83% of patent-holders) · 5 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 35/100 | $2M | 18 mo ago | — | Isabel Vila Co-Founder | HubSpot CMS HubApple iCloud MailSplide+16 | Seed | 5 patents Fluid leak detection sensors and differential pest monitoring technologies | — |
| 38 | Pearlstone Provider of cloud-based solution for commercial and industrial demand side response | $2M | 34 mo ago | 2 | Azad Camyab Founder & CEO | — | Seed | — | — |
| 39 | Troocost Provider of energy price comparison solutions for businesses 45Growth top 35%Tech top 38%Talent bottom 49%Market bottom 43% All 6 signals ▾Growthtop 35% Techtop 38% Talentbottom 49% Marketbottom 43% Fundingbottom 39% Globalbottom 32% Growth: Fresh capital in last 24 mo Tech: 42 technologies across 4/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 45/100 | $2M | 7 mo ago | 60 60 → 122 (+103%) · sector median +32% | Andrew Richardson CEO | WordPressMySQLPHP+31 | Seed | — | 1 award |
| 40 | Barocal Developer of solid-state barocaloric refrigeration technology. 19Growth top 45%Funding top 48%Talent bottom 49%Tech bottom 38% All 6 signals ▾Growthtop 45% Fundingtop 48% Talentbottom 49% Techbottom 38% Globalbottom 37% Marketbottom 17% Growth: Web rank 10,000,000 → 50,000,000 YoY · Fresh capital in last 24 mo Funding: Raised $1.8M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 19/100 | $2M | 1 mo ago | 2 | Xavier Moya Co-Founder | WordPressMySQLPHP+21 | Seed | — | — |
| 41 | HotGreen Solutions | $2M | 7 mo ago | — | Georgia Ware Co-Founder & CEO | Framer SitesReactLenis+7 | Seed | — | — |
| 42 | Snugg Provider of home energy efficiency solutions | $1M | 25 mo ago | 7 | Robin Peters Co-Founder & CEO | WebflowAmazon Web ServicesSlick+15 | Seed | — | — |
| 43 | Heero Technologies Online platform offering energy management solutions | $1M | 24 mo ago | 5 | Nicola Kennedy CEO | — | Seed | — | — |
| 44 | Furbnow Provider of home energy efficiency upgrade planning and management services | $1M | 29 mo ago | 6 | Laurence Watson Co-Founder & CPTO | Framer SitesPythonYouTube+22 | Seed | — | — |
| 45 | Dragonfly Insulation Manufacturer of silica aerogels | $1M | 27 mo ago | 4 | — | — | Seed | 7 patents Manufacturing silica aerogel materials for high-performance thermal insulation | — |
| 46 | Equiwatt AI-based demand response program system developer 24Growth top 35%AI top 45%Talent bottom 49%Tech bottom 46% All 9 signals ▾Growthtop 35% AItop 45% Talentbottom 49% Techbottom 46% Fundingbottom 42% Productbottom 40% Globalbottom 32% Newsbottom 18% Marketbottom 10% Growth: Fresh capital in last 24 mo AI: Product described with: ai-based rank vs industry peers · Fliar Intelligence Index 24/100 | $1M | 14 mo ago | 2 | Johnson Fernandes Co-Founder & CEO | HubSpot CMS HubApple iCloud MailGoogle Workspace+19 | Seed | — | — |
| 47 | Electryone AI AI-based platform that provides energy supplying solutions | $452K | 12 mo ago | 3 | Jed Comyn Co-Founder & CCO | — | Seed | — | — |
| 48 | Adia Provider of faster, cost-effective heat pump installation technology | $373K | 16 mo ago | — | Shaun Kaufmann Co-Founder | LovableZohoLeaflet+18 | Seed | — | 1 launch |
| 49 | Gridimp Provider of solutions for energy monitoring and management | $328K | 21 mo ago | — | Edward Ross Co-Founder | — | Early Stage | 2 patents Real-time electrical load monitoring for smart grid power management | — |
| 50 | Green Power Solutions Provider of energy management platform for off-grid assets 60Innovation top 18%Patents top 18%Talent bottom 49%Funding bottom 41% All 5 signals ▾Innovationtop 18% Patentstop 18% Talentbottom 49% Fundingbottom 41% Globalbottom 41% Innovation: 142 patents (top 9% of patent-holders) · 142 filings since 2022 vs 0 in 2017-21 Patents: 142 patents matched (strict assignee match) · 142 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 60/100 | $226K | 7 mo ago | — | Andrew Shaw Co-Founder & CTO | — | Seed | 142 patents Design and manufacturing of slotless electric motor components and power electronics. | 1 award |
Top 12 Energy Efficiency Tech companies in United Kingdom
#1
Series B · Sheffield, England · founded 2005 · 114 employees$46Mraised▾
Series B · Sheffield, England · founded 2005 · 114 employees
Manufacturer of precision liquid cooling systems for computer hardware components. These systems utilize dielectric fluid to remove heat from processors, memory, storage, and power supply units. The technology supports high-density computing environments by managing thermal loads and reducing energy consumption. The hardware is designed for deployment in data centers and edge computing facilities to maintain performance levels for intensive workloads.
Fliar Intelligence Index™ 53how this company ranks against its industry peers
Innovation
top 12%Patents
top 13%Moat
top 26%Funding
top 30%Talent
top 38%Tech
top 49%Innovation: 175 patents (top 9% of patent-holders) · 119 filings since 2022 vs 38 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 175 patents matched (strict assignee match) · 119 filings since 2022 vs 38 in 2017-21 · Latest publication 2026
Moat: Editorial + unicorn rating 8/10 · IP moat: 175 patents · Soonicorn
Audience (LinkedIn): 11k LinkedIn followers — 6.0% of this cohort's audience
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- May 2026Series B$26M
- Jan 2025Series B$7.1M
- Jun 2022Series B$36.8M
- Jun 2021Series A$4.2M
Founders & team
Investors
nVent, Northern Gritstone, Edinv, British Patient Capital, Pavilion Capital Partners, ABC Impact
Tech stack
AzureAzure Edge NetworkAzure Front DoorCloudflareCloudflare Bot ManagementCloudflare Turnstile
#2
Series D · London, England · founded 2019 · 376 employees$150Mraised▾
Series D · London, England · founded 2019 · 376 employees
Provider of utility management solution. It offers an energy tech platform based on data and machine learning capabilities. It specializes in customer information systems including billing.
Fliar Intelligence Index™ 83how this company ranks against its industry peers
Funding
top 22%Fin. health
top 23%Tech
top 32%Growth
top 33%Talent
top 38%Market
top 41%Funding: Raised $150M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) · Last round Series D (Dec 2025)
Fin. health: Revenue ~$171M · Revenue 1.1x total funding
Tech: 37 technologies across 5/8 capability areas · Cloud: Amazon Web Services, Cloudflare · Devops: Varnish
Funding rounds
- Dec 2025Series D$150M
Founders & team
Investors
D1 Capital Partners, Fidelity, Durable Capital Partners, Ontario Teachers' Pension Plan, Origin Energy
Tech stack
Amazon Web ServicesApple Icloud MailBootstrapCloudflareCloudflare Bot ManagementCookiebot
#3
Series C · London, England · founded 2016 · 59 employees$267.6Mraised▾
Series C · London, England · founded 2016 · 59 employees
Provider of an online platform for home insurance. It offers coverage for landlords, multi-property, gas fire protection, gas boiler, central heating, fuel, and controls. It also offers claims and emergency services. Company helps homeowners transition to low carbon living by installing and financing new low-carbon solutions like heat pumps, solar panels, and batteries.
Fliar Intelligence Index™ 62how this company ranks against its industry peers
Funding
top 24%Product
top 25%Growth
top 27%Tech
top 28%Innovation
top 39%Moat
top 39%Funding: Raised $268M across 12 rounds · 12 rounds over 10 yrs (1.2/yr) · Last round Conventional Debt (Oct 2024)
Product: 12 distinct product lines · Company stage: Series C
Growth: Headcount 38 → 59 (+55%) across vintages · 2 acquisition/expansion moves in 24 mo · Fresh capital in last 24 mo
Audience (LinkedIn): 10k LinkedIn followers — 5.3% of this cohort's audience · 67 engagements/post (3.3× cohort median)
Hiring (LinkedIn): 3 hiring posts in 12 mo (public) · hiring: Inbound Sales Executive, Retentions Executive
Activity (LinkedIn): 1 partnerships · 1 awards (incl. Wolseley Group) announced in 12 mo
Funding rounds
- Oct 2024Conventional Debt$65.1M
- Jun 2024Conventional Debt$319.3M
- Apr 2024Conventional Debt$83M
- Nov 2022Series C$36.7M
Founders & team
Investors
Anthemis Group, SVB, Literacy Capital, DN Capital, LocalGlobe, Oxford Capital
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesAwinBootstrapCart Functionality
#4
Seed · London, England · founded 2016$5.3Mraised▾
Seed · London, England · founded 2016
Network of installers providing heat pump installation and related services. The network consists of trained and vetted installers. They use an AI platform to design systems. The company offers performance guarantees and warranties on installations. It also provides support for larger renovation projects.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Tech
top 29%Growth
top 35%Talent
bottom 49%Funding
bottom 44%Global
bottom 37%Market
bottom 34%Tech: 61 technologies across 5/8 capability areas · Cloud: Cloudflare, Google Cloud · Devops: Nginx
Growth: Fresh capital in last 24 mo
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Audience (LinkedIn): 12k LinkedIn followers — 6.1% of this cohort's audience
Hiring (LinkedIn): 2 hiring posts in 12 mo (public) · momentum -2 · hiring: Heat Pump, Finance
Funding rounds
- Mar 2026Seed—
- Feb 2024Seed$4.7M
Founders & team
Investors
Transition, Triple Point, Carrier
Tech stack
Alpine.JsBunnyBunny FontsClickbankCloudflareCloudflare Bot Management
#5
Series A · London, England · founded 2009 · 5 employees$17.7Mraised▾
Series A · London, England · founded 2009 · 5 employees
AI-driven energy monitoring solution for homes. The company offers advanced home energy monitor & virtual assistance which tracks, monitors, and provides information on home appliances for efficient energy management. The platform enables users to calculate the cost of powering each appliance in their home giving them more control over energy bills.
Fliar Intelligence Index™ 48how this company ranks against its industry peers
Funding
top 29%Growth
top 35%Tech
top 36%AI
top 45%Talent
bottom 49%Product
bottom 48%Funding: Raised $17.7M across 15 rounds · 15 rounds over 11 yrs (1.4/yr) · Last round Series A (Sep 2025)
Growth: Fresh capital in last 24 mo
Tech: 30 technologies across 5/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Observability: Microsoft Clarity
Audience (LinkedIn): 4k LinkedIn followers — 2.1% of this cohort's audience
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Head of Data Science & Commercial Insights
Funding rounds
- Sep 2025Series A$358K
- Sep 2025Grant (prize money)$250K
- Feb 2025Series A$702.4K
- Apr 2024Series A$743.8K
Founders & team
Investors
Ignite Social Enterprise, Crowdcube, Austin Consultants, Innogy International Middle East, Earthworm, First Derivatives
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesGoogle WorkspaceHttp/3Hubspot
#6
Seed · Cambridge, England · founded 2019 · 2 employees$1.8Mraised▾
Seed · Cambridge, England · founded 2019 · 2 employees
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Fliar Intelligence Index™ 19how this company ranks against its industry peers
Growth
top 45%Funding
top 48%Talent
bottom 49%Tech
bottom 38%Global
bottom 37%Market
bottom 17%Growth: Web rank 10,000,000 → 50,000,000 YoY · Fresh capital in last 24 mo
Funding: Raised $1.8M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) · Last round Seed (May 2026)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Audience (LinkedIn): 2k LinkedIn followers
Activity (LinkedIn): 2 awards announced in 12 mo
Funding rounds
- May 2026Seed$10M
- Jan 2022Seed$1.8M
Founders & team
Investors
IP Group, University of Cambridge, World Fund, Breakthrough Energy, Cambridge Enterprise, Parkwalk
Tech stack
CdnjsCloudflareCore-JsElementorGsapHello Elementor
#7
Seed · Cambridge, England · founded 2022 · 2 employees$2.7Mraised▾
Seed · Cambridge, England · founded 2022 · 2 employees
Provider of energy management solutions for education, healthcare, industrial, and real estate. The company offers monitoring and analysis, automation and control, and bespoke consultancy services. These services aim to provide clarity on energy consumption, enable remote adjustments, and develop customized strategies for energy-intensive environments. The company focuses on helping organizations reduce energy waste and improve operational performance.
Fliar Intelligence Index™ 14how this company ranks against its industry peers
Talent
top 38%Funding
top 44%Moat
top 48%Tech
bottom 45%Global
bottom 37%Market
bottom 15%Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Funding: Raised $2.7M across 4 rounds · 4 rounds over 3 yrs (1.3/yr) · Last round Seed (Feb 2026)
Moat: Editorial + unicorn rating 4/10 · 10 curated direct competitors tracked
Audience (LinkedIn): 2k LinkedIn followers
Funding rounds
- Feb 2026Seed$2.2M
- Jul 2024Seed$1.8M
- Oct 2023Seed$755K
- Feb 2023Seed$144.6K
Founders & team
Investors
Antler, University of Cambridge, Parkwalk, R42 Group, Cambridge Angels, Komi
Tech stack
CloudflareCloudflare Bot ManagementCloudflare TurnstileCore-JsGoogle AnalyticsGoogle Tag Manager
#8
Series A · Cardiff, Wales · founded 2023$3.4Mraised▾
Series A · Cardiff, Wales · founded 2023
Provider of precision LED lighting solutions and autonomous control systems. It specializes in creating customized LED lighting systems tailored for various horticultural applications, including vertical farms and greenhouses. Their offer include modular and adaptable lighting systems designed to optimize plant growth and productivity.
Fliar Intelligence Index™ 24how this company ranks against its industry peers
Product
top 47%Talent
bottom 49%Global
bottom 45%Funding
bottom 44%Product: 2 published apps (30 installs) · Company stage: Series A
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Global: Investors from 1 country beyond United Kingdom
Audience (LinkedIn): 2k LinkedIn followers
Funding rounds
- Jan 2026Series A$3.4M
Founders & team
Investors
Foresight Group
#9
Series C · Oxford, England · founded 2014 · 32 employees$22.4Mraised▾
Series C · Oxford, England · founded 2014 · 32 employees
Provider of app-based residential heat storage solution. The company offers hot water tanks that deliver a greater amount of hot water from the same volume as a conventional cylinder which saves bills for the householder since heat losses are reduced. Its app is available for Android and iOS devices.
Fliar Intelligence Index™ 53how this company ranks against its industry peers
Moat
top 25%Innovation
top 28%Patents
top 29%Product
top 29%Growth
top 31%Funding
top 38%Moat: Editorial + unicorn rating 7/10 · IP moat: 70 patents
Innovation: 70 patents (top 47% of patent-holders) · 55 filings since 2022 vs 15 in 2017-21 · 10 product lines
Patents: 70 patents matched (strict assignee match) · 55 filings since 2022 vs 15 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 6k LinkedIn followers — 3.0% of this cohort's audience
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- Mar 2025Series C$15.5M
- Mar 2023Series B$11.2M
- Jan 2020Series A$4.7M
- Nov 2019Series A$5.2M
Investors
Foresight Williams, Oxford Science Enterprises, IP Group, Centrica, EDP, Kiko Ventures
Tech stack
Apple Icloud MailBugherdCloudflareCloudflare Bot ManagementContact Form 7Cookiebot
#10
Seed · Hamilton, Scotland · founded 2019 · 52 employees$13Mraised▾
Seed · Hamilton, Scotland · founded 2019 · 52 employees
Provider of SaaS platform to manage smart buildings. It offers a data integration platform that aggregates operational and environmental data of buildings from IoT sensors and other digital systems, analyses and compares with benchmark performance to measure asset performance. Its features include remote monitoring and real-time analytics.
Fliar Intelligence Index™ 35how this company ranks against its industry peers
Funding
top 36%Tech
bottom 49%Talent
bottom 49%Market
bottom 42%Product
bottom 40%News
bottom 32%Funding: Raised $13.0M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) · Last round Conventional Debt (Jun 2025)
Tech: 23 technologies across 3/8 capability areas · Cloud: Cloudflare · Security: Cloudflare Bot Management, Http/3
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Audience (LinkedIn): 5k LinkedIn followers — 2.4% of this cohort's audience
Activity (LinkedIn): 2 product launches announced in 12 mo
Funding rounds
- Jun 2025Conventional Debt$6.8M
- Mar 2023Conventional Debt$6.2M
- May 2022Seed—
Founders & team
Investors
The Scottish National Investment Bank, ASK4, Scottish Enterprise
Tech stack
All In One SeoCloudflareCloudflare Bot ManagementCookieyesCore-JsFont Awesome
#11
Series A · London, England · founded 2012 · 27 employees$6.7Mraised▾
Series A · London, England · founded 2012 · 27 employees
Provider of building analytical solutions. The company offers tools for managing a building's environment, maintenance, usage, and health. Features include workspace management, maintenance management, data analytics, and more.
Fliar Intelligence Index™ 19how this company ranks against its industry peers
Talent
bottom 49%Funding
bottom 46%News
bottom 41%Global
bottom 39%Market
bottom 35%Talent: 1 named leader on record · 1 C-suite/founder profile curated
Funding: Raised $6.7M across 2 rounds · 2 rounds over 6 yrs (0.3/yr) · Last round Series A (Aug 2025)
News: 1 BI events in 12 mo (of 4 tracked, 2 types) · Top themes: Funding
Audience (LinkedIn): 5k LinkedIn followers — 2.7% of this cohort's audience
Activity (LinkedIn): 1 product launches announced in 12 mo
Funding rounds
- Aug 2025Series A$806.7K
- Nov 2020Series A$3.1M
Founders & team
Investors
Valereum, AP Capital, Orchard Capital Management, Polinvest Sas, AGC SSAS, Wineview
#12
Seed · Newcastle Upon Tyne, England · founded 2016 · 60 employees$1.9Mraised▾
Seed · Newcastle Upon Tyne, England · founded 2016 · 60 employees
Provider of energy price comparison solutions for businesses. It provides solutions for electricity and gas. It also provides solutions for billing, new connections, meters, energy savings, and others. Monetizes through subscription charges from suppliers.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Growth
top 35%Tech
top 38%Talent
bottom 49%Market
bottom 43%Funding
bottom 39%Global
bottom 32%Growth: Fresh capital in last 24 mo
Tech: 42 technologies across 4/8 capability areas · Cloud: Cloudflare · Observability: Microsoft Clarity
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Audience (LinkedIn): 4k LinkedIn followers
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- Oct 2025Conventional Debt—
- May 2022Seed$632.2K
- Nov 2018Seed$637.1K
Founders & team
Investors
Mercia, NEL Fund Managers
Tech stack
Animate.CssCloudflareCloudflare Bot ManagementContact Form 7Core-JsFont Awesome
Funding & investor landscape
$2Btotal disclosed funding
151companies funded
402disclosed rounds
4rounds last 90 days
Most active investors
Gov14 rounds
Notable founders
David Craig
Co-CEO · Iceotope
Simon Jesenko
Co-CEO & CFO · Iceotope
Matthew Potts
Co-Founder · Kraken
James Eddison
Co-Founder & CTO · Kraken
Simon Phelan
Co-Founder & CEO · Hometree
Adam Chapman
Founder · Heat Geek
Peter Davies
Founder & CEO · Verv
Xavier Moya
Co-Founder · Barocal
Alexander Allen
Co-Founder & CPO · xWatts
Yigit Akar
Co-Founder & CEO · xWatts
James Fleet
Co-Founder & CEO · Bloemteknik
Jonathan Burridge
Founder & CEO · Utopi
Prism market signals · United Kingdom · country-scoped Prism corpus, 3,815,863 docs
Market landscape — 10 sub-themes by coverage
Share of Energy Efficiency Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
RESEARCH SIGNALS · United Kingdom
How research on Energy Efficiency & Buildings is moving in the United Kingdom
A read on the academic research around Energy Efficiency & Buildings — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 1,186 United Kingdom-affiliated papers.
research sentiment over time
200820172026
enthusiastic · positive · guarded tone
Tone is overwhelmingly optimistic and intensifying — the enthusiastic (strongly-positive) share moved 25% → 50% across 2008–2026.
top research entities
- University of Nottingham96
- Imperial College London51
- Loughborough University48
- Institute of Refrigeration47
- University College London36
leading researchers
Saffa Riffat · Neil Hewitt · Christos N. Markides · Zhibin Yu · Anthony Paul Roskilly · Ming Jun Huang · T. Logenthiran · Y.T. Ge
▲
Breakthroughs231 · 19%
▲ 14%→23% share
▲1.6× share momentum4 median citations62% since 2021mostly methods-led
Phase-change material and TRNSYS research newly emerged while Heat pump breakthroughs tripled (9→33), signalling rapid thermal-storage innovation.
rising sub-themes (early→recent)
- Energy management13→47
- Renewable energy6→31
- Heat pump9→33
- Microgrid5→25
- Battery (electricity)1→15
Newly emergingPhase-change material 0→8 · TRNSYS 0→7 · Waste heat 0→6
Landmark Energy Management in Autonomous Microgrid Using Stability-Constrained Droop Control of Inverters · 726 cites
◆
Advancements683 · 58%
▼ 58%→55% share
▼0.9× share momentum3 median citations51% since 2021mostly methods-led
Heat pump advancements intensifying — papers rose 81→118, now the dominant advancement sub-topic across UK building-efficiency research.
rising sub-themes (early→recent)
- Energy management29→69
- Heat pump81→118
- Renewable energy19→51
- Energy storage8→31
- Microgrid11→32
Newly emergingControl theory (sociology) 0→8 · Radiative cooling 0→6 · Life-cycle assessment 0→6
Landmark Combined analysis of electricity and heat networks · 717 cites
▼
Concerns163 · 14%
▲ 14%→15% share
▲1.1× share momentum4 median citations58% since 2021mostly empirical
Heat pump concern papers doubled (24→50) alongside Electrification rising 1→8, flagging growing grid and deployment risk scrutiny.
rising sub-themes (early→recent)
- Heat pump24→50
- Electricity9→23
- Environmental economics1→10
- Renewable heat4→11
- Electrification1→8
Landmark Energy Management in Plug-in Hybrid Electric Vehicles: Recent Progress and a Connected Vehicles Perspective · 712 cites
RESEARCH HOTSPOTS · United Kingdom
Where energy efficiency is researched across United Kingdom
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
London159 · +0.41
Glasgow66 · +0.53
Edinburgh49 · +0.54
Oxford44 · +0.42
Manchester33 · +0.52
Birmingham32 · +0.57
Cambridge24 · +0.23
Bristol9 · +0.28
PATENT SIGNAL · United Kingdom
Who's filing energy efficiency patents in the United Kingdom
United Kingdom energy efficiency patent filing is accelerating — 271 filings from 212 assignees (2016–2025), led by Mitsubishi Electric R&D CT Europ, Mitsubishi Electric, Octopus Energy Heating; annual filings 11→55.
271 filings212 assigneespeak 55/yr2016–2025
filing momentum (YoY 2016–2025)
top patent filers
- Mitsubishi Electric R&D CT Europ27
- Mitsubishi Electric27
- Octopus Energy Heating25
- Infineum INT18
- GRID EDGE15
- Smith S Environmental Products15
- Atalla NAJI AMIN14
- Thermal Energy Systems14
Common questions
How many Energy Efficiency Tech companies are there in United Kingdom?
Radar tracks 627 indexable Energy Efficiency Tech companies headquartered in United Kingdom that meet our profile-completeness bar.
What is the total funding raised by Energy Efficiency Tech companies in United Kingdom?
The Energy Efficiency Tech companies in United Kingdom on this list have raised a combined $2B in disclosed equity funding across 151 funded companies.
Which is the highest-funded Energy Efficiency Tech company in United Kingdom?
Hometree is the highest-funded Energy Efficiency Tech company in United Kingdom, with $267.6M in disclosed equity funding.
How many Energy Efficiency Tech companies in United Kingdom are funded?
151 of the 627 Energy Efficiency Tech companies in United Kingdom on this list have disclosed at least one equity funding round.
How many Energy Efficiency Tech unicorns are there in United Kingdom?
3 Energy Efficiency Tech companies in United Kingdom on this list are valued at $1B or more.
Who are the top investors in United Kingdom Energy Efficiency Tech companies?
The most active investors in United Kingdom Energy Efficiency Tech companies on this list include Europa, Gov, Mercia, Low Carbon Innovation Fund, SETsquared.
Riya SenguptaFinancials
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.