Radar · Energy Efficiency Tech in London
Best Energy Efficiency Tech Companies in London, United Kingdom
The 142 best Energy Efficiency Tech companies in London, United Kingdom in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Hometree.
By Riya SenguptaFinancials
142companies tracked
$1.1Bdisclosed funding
3unicorns
59have raised
FLIAR INTELLIGENCE · ENERGY EFFICIENCY TECH × LONDON
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
95kcombined LinkedIn audience
37%of audience held by top 3
4companies hiring publicly (12 mo)
Ranked: Best Energy Efficiency Tech companies in London
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | 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%) | Simon Phelan Co-Founder & CEO | Cart FunctionalitySentryZendesk+27 | — | 1 partnership |
| 2 | Deep Green 🦄 Provider of environmental consultancy and carbon neutral services | $255M | 30 mo ago | 4 | — | WordPressMySQLPHP+27 | — | 1 partnership · 1 expansion |
| 3 | 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 | 116 mo ago | 26 | — | — | 56 patents Smart grid control and battery storage management for electrical loads and components | — |
| 4 | 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 | — | — |
| 5 | 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 | — | — | — |
| 6 | 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 | 5 patents Building energy management systems for automated control of power-consuming devices | — |
| 7 | 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 | 9 mo ago | 5 | Peter Davies Founder & CEO | Cart FunctionalitySquarespace CommerceSquarespace+21 | — | 1 job opening |
| 8 | Tepeo Provider of heating management solutions | $16M | 42 mo ago | 21 21 → 29 (+38%) | Johan Du Plessis Founder & CEO | WordPressMySQLPHP+29 | 20 patents Thermal energy storage and control technologies for residential/commercial heating systems. | — |
| 9 | Onzo Market intelligence solution for utilities and insights for customers | $13M | 111 mo ago | 6 | — | — | 73 patents Patents concentrated in computing, sensing & instrumentation | — |
| 10 | 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%) | Gary Cottle Co-Founder & CEO | — | — | — |
| 11 | 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 | — | 1 expansion · 1 award |
| 12 | Future Intelligence Provider of a network management platform for IoT applications | $6M | 41 mo ago | — | Nikolaos Zotos Co-Founder & CEO | — | — | — |
| 13 | Hero Labs IoT solution for detecting, preventing, and stopping water leaks in home and businesses | $5M | 55 mo ago | 4 | — | — | — | — |
| 14 | 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 | — | — |
| 15 | Labrador Meter monitoring for homes | $5M | 93 mo ago | 5 | — | Cart FunctionalitySquarespace CommerceSquarespace+28 | — | — |
| 16 | OpenSensors SaaS-driven IoT-enabled building management solution | $4M | 66 mo ago | 5 | Yodit Stanton Founder & CEO | — | — | — |
| 17 | OakTree Power Provider of technology solutions for energy efficiency management | $4M | 55 mo ago | 8 | Andreas Wiele Co-Founder | — | — | — |
| 18 | Faradai AI and cloud-based platform offering energy analytics solutions for commercial applications | $3M | 43 mo ago | 63 | Sahin Caglayan Co-Founder & CEO | Node.jsElement UITailwind CSS+12 | — | 1 internship · 2 launchs |
| 19 | Voltaware IoT & AI-driven energy management solution for homes | $3M | 100 mo ago | 5 | Philippe Berard Co-Founder & CEO | Facebook Loginstyled-componentsEmotion+18 | — | — |
| 20 | Elyos Energy Platform offering solutions for energy management | $3M | 32 mo ago | — | Adrian Johnston Co-Founder & CEO | — | — | — |
| 21 | Savortex IoT based technology solutions provider for hand dryer | $3M | 117 mo ago | 1 | Syed Ahmed Founder & CEO | WordPressMySQLPHP+33 | — | — |
| 22 | Guru AI-driven platform offering HVAC monitoring solutions | $3M | 60 mo ago | 39 39 → 36 (-8%) | Casey Cole Co-Founder & CEO | WordPressMySQLPHP+21 | — | 1 launch · 1 partnership · 1 award |
| 23 | Virtual Power Solutions Virtual power plant management and energy management softwares | $2M | 68 mo ago | — | J Basilio Simoes Co-Founder & COO | — | — | — |
| 24 | Switchd Provider of SaaS-driven utility auto-switching solutions | $2M | 54 mo ago | 11 | Thomas Rogers Co-Founder | PHPBootstrapApache HTTP Server+18 | — | — |
| 25 | Quimera Energy Provider of energy as a service | $2M | 72 mo ago | 3 | Cherrie Sacchetti Co-Founder | — | — | 1 launch · 1 partnership |
| 26 | 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 | 5 patents Fluid leak detection sensors and differential pest monitoring technologies | — |
| 27 | Pearlstone Provider of cloud-based solution for commercial and industrial demand side response | $2M | 34 mo ago | 2 | Azad Camyab Founder & CEO | — | — | — |
| 28 | KiWi Power SaaS-driven building energy management solution for buildings | $2M | 90 mo ago | 3 | — | — | — | — |
| 29 | Greenstorc Provider of low-heat geothermal to energy and industrial waste heat recovery solutions | $2M | 92 mo ago | 1 | — | — | — | — |
| 30 | N3rgy Provider of energy transformation services | $2M | 48 mo ago | 1 | Matt Roderick Founder of n3rgy | WordPressMySQLPHP+21 | — | — |
| 31 | Arthur Provider of property management software designed to save time and money | $1M | 105 mo ago | 36 36 → 28 (-22%) | Beverley Cummin Co-Founder | HubSpot CMS HubEnvoyBootstrap+20 | — | — |
| 32 | Unite Technologies Provider of energy management solutions | $1M | 189 mo ago | 21 | — | — | — | — |
| 33 | MY ZeERO Provider of energy monitoring, analysis, and optimization solutions | $792K | 84 mo ago | 11 | — | — | — | — |
| 34 | FaultFixers SaaS-driven maintenance management software for building and office spaces | $750K | 65 mo ago | 2 | Tom Neill Co-Founder & CEO | WebflowApple iCloud MailGoogle Workspace+24 | — | 1 award |
| 35 | addvantage Provider of dual-fuel technology that reduces emissions and fuel costs | $674K | 87 mo ago | 1 | — | — | — | — |
| 36 | DriWay Technologies Provider of building health technology solutions addressing invasive groundwater. | $600K | 64 mo ago | 3 | Joel Kesler Co-Founder & Board Director | — | — | — |
| 37 | Electryone AI AI-based platform that provides energy supplying solutions | $452K | 12 mo ago | 3 | Jed Comyn Co-Founder & CCO | — | — | — |
| 38 | GridDuck Automated demand response platform for aggregators and installs hardware devices | $416K | 63 mo ago | 4 | Gregor Hoefter Co-Founder & CEO | — | — | — |
| 39 | Adia Provider of faster, cost-effective heat pump installation technology | $373K | 16 mo ago | — | Shaun Kaufmann Co-Founder | LovableZohoLeaflet+18 | — | — |
| 40 | FlatPeak Provider of real-time AI-based energy rates API | $329K | 33 mo ago | 11 | Michelle Velan Co-Founder | — | — | — |
| 41 | Dtime Provider of data-driven solutions for clean energy assets | $316K | 32 mo ago | 4 | Gautham K Co-Founder & CEO | — | — | — |
| 42 | Incube Space IoT & SaaS-driven energy management solutions for buildings | $250K | 50 mo ago | 2 | George Johnston Co-Founder | — | — | — |
| 43 | CoControl Manufacturer of smart thermostats for homes. | $230K | 128 mo ago | 1 | — | — | — | — |
| 44 | Taremtec Provider of visitor management systems for educational institutions | $135K | 88 mo ago | 8 | Samuel Komolafe Managing Director | — | — | — |
| 45 | Look After My Bills Online platform for energy deals for retail energy customers | $120K | 96 mo ago | 18 | Henry Zoete Co-Founder | — | — | — |
| 46 | SMAP Energy Smart meter analytics SaaS for energy retailers | $84K | 93 mo ago | 11 | Adnan Mortada Co-Founder | — | — | — |
Top 12 Energy Efficiency Tech companies in London
#1
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
#2
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 — 12.4% 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
#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 — 10.8% of this cohort's audience · 67 engagements/post (1.6× 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
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 — 4.2% 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
#5
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 — 5.5% 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
#6
Series D · London, England · founded 2021 · 4 employees$255Mraised▾
Series D · London, England · founded 2021 · 4 employees
Provider of environmental consultancy and carbon neutral services
LinkedIn Pulse recent public activity · Jul 2026
Audience: 5k LinkedIn followers — 5.8% of this cohort's audience
Activity: 1 partnerships · 1 expansions (incl. Urmston data centre) announced in 12 mo
Funding rounds
- Dec 2023Series D$255M
Investors
Octopus Energy Generation
Tech stack
Framer SitesGoogle AnalyticsGoogle Font ApiGoogle WorkspaceHstsHttp/3
#7
Switchee 🦄Series A · London, England · founded 2015 · 23 employees$20.1Mraised▾
Switchee 🦄
Series A · London, England · founded 2015 · 23 employees
Provider of smart thermostat devices and data-driven insights for housing. The company offers a platform displaying real-time data to support property management. Actionable insights include identifying mould risk and potential fuel poverty. The device allows residents to control heating and hot water, optimising energy use. It also facilitates communication between housing providers and residents through surveys and messaging.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Talent
top 28%Moat
top 31%Funding
top 38%Growth
top 45%Product
top 46%Tech
top 48%Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
Moat: Editorial + unicorn rating 7/10 · IP moat: 5 patents · Unicorn
Funding: Raised $20.1M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) · Last round Series A (Jul 2024)
Funding rounds
- Jul 2024Series A$6.4M
- Aug 2022Series A$7.7M
- Mar 2020Seed$2.6M
- Jun 2018Seed$1.7M
Founders & team
Investors
Octopus Ventures, AXA Investment Managers, ClearlySo, Wayra, Evergreen, Mustard Seed + Partners
Tech stack
AosCivicthemeCloudflareCloudflare Bot ManagementCloudflare Browser InsightsCookiebot
#8
Series B · London, England · founded 2018 · 61 employees$119.8Mraised▾
Series B · London, England · founded 2018 · 61 employees
Developer of an infrastructure management platform designed to automate and optimize facilities and building management. The company's platform combines IoT sensors with AI and has compatible sensors to simplify data collection and deliver the data securely to their partners' analytics programs in the cloud, enabling facilities managers and estate owners to create efficient, healthy and sustainable buildings, whilst strengthening compliance and reducing costs.
Fliar Intelligence Index™ 78how this company ranks against its industry peers
Growth
top 8%Moat
top 22%Global
top 24%Funding
top 32%Market
top 43%AI
top 45%Growth: Headcount 5 → 61 (+1120%) across vintages
Moat: Editorial + unicorn rating 8/10 · Soonicorn
Global: Serving 60+ countries worldwide · Investors from 3 countries beyond United Kingdom
Founders & team
Investors
Keyframe, A/O PropTech, Jeppe Zink, JLL Technologies, TVC Holdings, SoftBank Vision Fund
#9
Series A · London, England · founded 2021 · 2 employees$6.2Mraised▾
Series A · London, England · founded 2021 · 2 employees
Provider of AI-powered platform for energy forecasting and management solutions. The platform offers advanced artificial intelligence and machine learning models for precise predictions. It handles and analyzes live data streams, allowing for immediate adjustments in forecasting. The architecture is scalable and modular, accommodating evolving business requirements.
Fliar Intelligence Index™ 40how this company ranks against its industry peers
AI
top 25%Tech
top 37%Growth
top 45%Funding
top 47%Talent
bottom 49%Global
bottom 39%AI: Product described with: ai-powered, artificial intelligence, machine learning
Tech: 34 technologies across 4/8 capability areas · Cloud: Amazon Web Services, Cloudflare · Security: Cloudflare Bot Management, Hsts
Growth: Web rank 10,000,000 → 50,000,000 YoY · Fresh capital in last 24 mo
Audience (LinkedIn): 2k LinkedIn followers — 2.0% of this cohort's audience
Activity (LinkedIn): 1 awards · 1 expansions announced in 12 mo
Funding rounds
- Sep 2024Series A$3.3M
- Sep 2023Seed$674K
- Feb 2022Seed$2.3M
Founders & team
Investors
Early Game Ventures, MMC Ventures, Soulmates Ventures, Greater London Investment Fund, Sofia Angels Ventures, VERBUND
Tech stack
Amazon Web ServicesCloudflareCloudflare Bot ManagementCore-JsDatocmsFacebook Pixel
#10
Seed · London, England · founded 2021$2.1Mraised▾
Seed · London, England · founded 2021
Provider of cloud-based smart buildings solutions. It offers a LoRa network that transforms coatings into the connected surface for real-time moisture level monitoring, occupancy tracking, hygienic interaction and cleaning monitoring and energy usage management. Its features include dashboard view, event classification, cloud connectivity, and maintenance management.
Fliar Intelligence Index™ 35how this company ranks against its industry peers
Growth
top 35%Innovation
top 46%Patents
top 46%Funding
top 47%Talent
bottom 49%Tech
bottom 42%Growth: Fresh capital in last 24 mo
Innovation: 5 patents (top 83% of patent-holders) · 5 filings since 2022 vs 0 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 5 patents matched (strict assignee match) · 5 filings since 2022 vs 0 in 2017-21 · Latest publication 2025
Audience (LinkedIn): 3k LinkedIn followers — 3.3% of this cohort's audience
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- Dec 2024Seed$7M
- Jul 2022Seed$2.1M
Founders & team
Investors
Mundi Ventures, Burnt Island, Closed Loop Partners, Onesmallplanet, Virta Ventures, Bonaventure Capital
Tech stack
AosApple Icloud MailCloudflareCloudflare Bot ManagementCore-JsGodaddy
#11
Seed · London, England · founded 2023 · 3 employees$452.4Kraised▾
Seed · London, England · founded 2023 · 3 employees
AI-based platform that provides energy supplying solutions. It provides solutions for customer engagement, optimize device usage, and create new opportunities in the energy sector.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 2k LinkedIn followers — 2.4% of this cohort's audience
Funding rounds
- May 2025Seed$452.4K
Founders & team
Investors
33East
#12
Acquired · London, England · founded 1999 · 26 employees$166.7Mraised▾
Acquired · London, England · founded 1999 · 26 employees
Open Energi offers energy demand management solutions that react to changes in the balance between supply and demand on the electricity grid and contributes to keeping the grid in balance. The dynamic demand technology integrates with a range of equipment from fridges to furnaces and turns them into smart devices which can adjust their energy consumption in real-time to help the grid manage electricity supply and demand. It offers analytics based on demand response for utilities to act accordingly.
Fliar Intelligence Index™ 24how this company ranks against its industry peers
Moat
top 32%Product
top 37%Innovation
top 40%Funding
top 41%Patents
top 45%Growth
bottom 42%Moat: Editorial + unicorn rating 5/10 · IP moat: 56 patents
Product: 0 product launch events in 12 mo · 7 distinct product lines · Company stage: Acquired
Innovation: 56 patents (top 28% of patent-holders) · 14 filings since 2022 vs 36 in 2017-21 · 7 product lines
Funding rounds
- Oct 2016Series C$25M
- Feb 2015Grant (prize money)$917.3K
- Jan 2015Series C$8M
- Sep 2012Series C$113M
Investors
Low Carbon Germany, Naxos Capital Partners, Carbon Trust, Ombu Group, Europa, 350 Investment Partners
Tech stack
Cart FunctionalitySquarespace CommerceSquarespaceStimulusGoogle AnalyticsPriority Hints
Funding & investor landscape
$1.1Btotal disclosed funding
50companies funded
147disclosed rounds
0rounds last 90 days
Most active investors
Crowdcube3 rounds
Gov3 rounds
Notable founders
Matthew Potts
Co-Founder · Kraken
James Eddison
Co-Founder & CTO · Kraken
Adam Chapman
Founder · Heat Geek
Simon Phelan
Co-Founder & CEO · Hometree
Peter Davies
Founder & CEO · Verv
Gary Cottle
Co-Founder & CEO · Metrikus
Ed Warrick
Co-Founder · Switchee
Adam Fudakowski
Founder & Executive Director · Switchee
William Cowell De Gruchy
Founder & CEO · Infogrid
Matei Stratan
Founder & CEO · Ogre
Isabel Vila
Co-Founder · LAIIER
Jed Comyn
Co-Founder & CCO · Electryone AI
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 IN LONDON · Energy
How research on Energy Efficiency in London is moving
A read on the academic research around Energy Efficiency in London — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 154 papers.
Imperial College London and UCL lead London's energy-efficiency research, optimistically advancing building optimization and smart grid management, with recent output nearly doubling earlier work.
154 papers · stance +0.41 · 18% breakthrough · 20% concern
top institutions
- Imperial College London51
- University College London36
- Brunel University of London32
- London South Bank University14
- Queen Mary University of London5
leading researchers
Christos N. Markides · S.A. Tassou · Y.T. Ge · Andreas V. Olympios · Jenny Crawley · Goran Štrbac
prism intelligence · tone & topics
94% positive · 3% critical tone
BusinessEnvironmentSustainabilityConstructionHome ImprovementReal Estate
▲
Breakthroughs26 · 17%
▲ 16%→17% share
▲1.1× share momentum5 median citations62% since 2021mostly methods-led
Microgrid and renewable energy breakthroughs are rising sharply — both quadrupled to 4 papers, with photovoltaic systems newly emerging.
rising sub-themes (early→recent)
- Scheduling (production processes)1→5
- Energy management3→7
- Microgrid1→4
- Renewable energy1→4
- Heat pump1→3
Newly emergingEnergy (signal processing) 0→4 · Photovoltaic system 0→3
Landmark Energy Management in Autonomous Microgrid Using Stability-Constrained Droop Control of Inverters · 726 cites
◆
Advancements88 · 57%
▲ 55%→57% share
▲1.0× share momentum4 median citations62% since 2021mostly methods-led
Heat pump advancement research is intensifying — papers more than doubled from 9 to 21, leading all advancement sub-topics.
rising sub-themes (early→recent)
- Heat pump9→21
- Electricity1→10
- Process engineering2→9
- Renewable energy1→6
- Thermal energy storage3→8
Newly emergingEnergy storage 0→8 · Waste heat recovery unit 0→5 · Microgrid 0→4
Landmark Experimental investigations into power generation with low grade waste heat and R245fa Organic Rankine Cycles (ORCs) · 101 cites
▼
Concerns29 · 19%
▲ 18%→20% share
▲1.1× share momentum5 median citations66% since 2021mostly empirical
Heat pump concerns are surging — papers nearly quadrupled from 3 to 11, with thermal comfort and greenhouse gas risks newly flagged.
rising sub-themes (early→recent)
- Heat pump3→11
- Electricity1→6
- Environmental economics1→3
Newly emergingThermal comfort 0→4 · Heat exchanger 0→3 · Greenhouse gas 0→3
Landmark Resilient cooling strategies – A critical review and qualitative assessment · 162 cites
Common questions
How many Energy Efficiency Tech companies are there in London, United Kingdom?
Radar tracks 142 indexable Energy Efficiency Tech companies headquartered in London, United Kingdom that meet our profile-completeness bar.
What is the total funding raised by Energy Efficiency Tech companies in London, United Kingdom?
The Energy Efficiency Tech companies in London, United Kingdom on this list have raised a combined $1.1B in disclosed equity funding across 50 funded companies.
Which is the highest-funded Energy Efficiency Tech company in London, United Kingdom?
Hometree is the highest-funded Energy Efficiency Tech company in London, United Kingdom, with $267.6M in disclosed equity funding.
How many Energy Efficiency Tech companies in London, United Kingdom are funded?
50 of the 142 Energy Efficiency Tech companies in London, United Kingdom on this list have disclosed at least one equity funding round.
How many Energy Efficiency Tech unicorns are there in London, United Kingdom?
3 Energy Efficiency Tech companies in London, United Kingdom on this list are valued at $1B or more.
Who are the top investors in London, United Kingdom Energy Efficiency Tech companies?
The most active investors in London, United Kingdom Energy Efficiency Tech companies on this list include Europa, Undaunted, Climate KIC, Crowdcube, Gov.
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.