Top 45 CleanTech Angel Investors in United Kingdom (June 2026)

Portfolio highlights

• Stackfix — Stackfix operates as a software comparison platform.
• Singulate — The early Hopin team (#1, #4, #30 are cofounders) are back together to solve the biggest problem they saw in events and marketing at Hopin. They’re building a next gen AI marketing platform called Singulate. Singulate provides the easiest way to do audience segmentation and better relevance-personalization for marketing to individuals at scale —results of up to 10X higher CTRs and 5X response rates. They’re helping marketers (in demand gen, growth, community/events) nurture and convert more pipeline from their events and existing customers - it’s not an AI cold outreach sales tool (although it can do reactivations) but rather a lifecycle growth marketing tool. The best personalization is invisible - this is the future of large-scale communication. Get a demo to see the product.
• Kombo — One unified API for HRIS, Payroll & ATS

Portfolio highlights

• Yupp — Every AI for everyone
• Subtle Computing —
• Vantage Discovery — Vantage Discovery is a generative AI-powered SaaS platform that enables intelligent search, discovery, and personalized recommendations so apps can deliver breathtaking customer experiences.

Portfolio highlights

• Agnikul — Agnikul Cosmos designs and manufactures orbital-class launch vehicles powered by 3D-printed engines. From custom payloads to affordable private launches, we make space access simple, scalable, and mission-focused.
• Log 9 Materials — Log 9 Materials Scientific Private Limited is a graphene research and development company. At Log 9 Materials we are determined to accelerate the commercialization of graphene nanotechnology. We have just developed the first commercial product on graphene- 'Smoke-safe'. This innovative graphene based cigarette filter reduces the risk ofgetting cancer by 90%. We offer a wide range of graphene (CVD graphene, rGO) and its derivatives. We bring to you graphene as researchers and not just manufactures, so we understand the triviality of the grade of our products.
• Toffee Ride - Learning App for Classes I - IV — Developed by a group of IIM, NIT alumni, with the support of academicians and child development experts, Toffee Ride is an app-based learning program that helps your child develop a thorough understanding of fundamental concepts and improve their language skills. Toffee Ride helps to make productive use of your kid's screen time by keepingthem engaged through a wide variety of fun-filled learning activities. Toffee Ride is specifically designed for Classes I-IV and contains more than 800 + lessons and 6000 + activities, which provide comprehensive coverage of English, Maths, EVS, GK, Social Studies, and Life Skills. Our Vision: “Making premium education affordable”The level of personalized attention required during the formative years is lacking in most schools, except for a few premium ones. Moreover, most parents, especially working professionals, often find it difficult to find time to compliment their kids learning in school. A rather serious implication of this is that children whose development lag behind during their early years find it very difficult to catch up in their higher classes. Through Toffee Ride, we attempt to bridge this gap using technology as an enabler to provide the much-needed personal attention in early learning.

Portfolio highlights

• Desia — Desia provides advanced AI applications for productivity, automation, and analytics for financial services.
• qomodo — Qomodo: La piattaforma BNPL innovativa. Rate a tasso zero, approvazioni veloci, transazioni sicure. Rivoluzionaria nell'acquisto per aziende e consumatori.
• Tranched — Introducing real-time on-chain securitisation. Fintech Lenders and Professional Investors can now launch an institutional-grade transaction up to 90% faster than before.

Portfolio highlights

• Oxwash — Powered by Vanish, Oxwash provides on-demand laundry and eco-friendly dry cleaning services, creating a simple and sustainable laundry service for all.
• Tem-Energy — Power, as it should be. We've reinvented how energy is bought and sold, so businesses pay less and generators earn more.
• Papaya — Papaya offers platform to source, run and manage your electric vehicles.

Portfolio highlights

• Oxwash — Powered by Vanish, Oxwash provides on-demand laundry and eco-friendly dry cleaning services, creating a simple and sustainable laundry service for all.
• Metagood — Tokenization as a Service for Modern Capital Markets
• Tem-Energy — Power, as it should be. We've reinvented how energy is bought and sold, so businesses pay less and generators earn more.

Portfolio highlights

• Droppe — Order work equipment directly from manufacturers. Support small businesses and source more responsibly from local and European manufacturers. Order from several suppliers at the same time with one shopping cart. Test samples for free and order products for your workplaces without extra hassle. Find nitrile gloves, protective clothing, work gloves, work accessories, disposable gloves, disinfectants, sanitizers and other supplies in one place.
• Taito.ai — Taito.ai provides an AI platform that allows users to develop and deploy intelligent applications. It supports various tools and features for building machine learning models. Users can access resources for training and optimizing their AI solutions.
• Lovable — Lovable builds software that builds software. Lovable vision is to unlock human creativity by enabling anyone to create software.

Portfolio highlights

• Forteus — Forteus is an asset manager focused on blockchain technology and digital assets.
• Emitwise — The Emitwise technology platform is now part of Green Project Technologies, delivering end-to-end decarbonization solutions for enterprises.
• Antler — Build your next company with Antler, a global day zero investor enabling exceptional founders to start great companies, from the very beginning. Apply now!

Portfolio highlights

• Bpacks — Tree bark packaging

Portfolio highlights

• Bippit — Financial concerns are the No. 1 cause of stress at work. Bippit delivers expert guidance, planning tools, and support to every employee at every stage.
• Wally Health — Unlimited dental cleanings and whitening for $199/year
• Growth Kitchen — Growth Kitchen provides a network of delivery-optimized kitchens coupled with food delivery solutions and support.

Portfolio highlights

• Lawyerd — Lawyerd-supervised content takedowns at scale, grounded in the Berne Convention, EU Directive 2019/790, the DMCA and GDPR Article 17. For brands and individuals whose name, logo or work is being used without authorisation.
• Voltaage — Voltage makes it easy for fleet managers of SMEs to simulate, plan and run their fleet electrification without disrupting business operations and drivers’ habits. Our marketplace offers and crafts tailored package deals for EVs, charging stations & electric fuel cards.With our expertise: We help them to make data-driven decisions and tounderstand the true opportunity cost of every car in their fleet, We simulate the optimal EV fleet composition in days instead of months, And we compare the total cost of ownership (TCO) and carbon emissions projections using fleet data. Our business model is based on 2 streams of revenues, a SaaS subscription model charged monthly to companies using our software for their transition to electric mobility; and a brokerage fee, charged to partners for any solution sold through our platform (cars, charging stations, aftersale solutions)Join the fleet revolution.
• PowerMarket — A platform for turn-key solar life cycle management.

Portfolio highlights

• Lick — Lick | Paints, Wallpapers and Supplies. Your Room, Covered
• By Rotation — Rent over 25000+ designer fashion items online from our free app. Discover luxury designer dresses, clothing, bags and accessories from your trending favorite brands.
• Anch.ai — Anch.ai expert on the effects of digitalization on organizations, society, and the economy—to determine the ethical and societal risks of AI.

Portfolio highlights

• Talyn Air — Inspired by two-stage rockets, our innovative eVTOL uses two flight vehicles to transform flight. Fixed-wing performance with VTOL capabilities.
• BillionToOne — We are a team at the forefront of disease detection focused on moving Prenatal Screening and Liquid Biopsy forward.
• CaSRevolution — A novel disease-modifying approach against neurodegeneration

Portfolio highlights

• Puraffinity — Puraffinity develops targeted materials for water treatment, focused on forever chemicals called PFAS. Our strategic intent is to provide 1 billion people with PFAS safe water by 2030
• Moixa Technology — Moixa Technology develops the Maslow intelligent energy storage solution, enabling homes to store energy and benefit from revenue streams generated by trading energy through GridShare, an SaaS platform that aggregates energy from groups of Maslow energy storage systems. . The company develops smart DC technologies to power DC lighting, computing,electronics from grid-shifted storage or local PV from smart DC hubs, variable DC networks and sockets. The technology and IPR reduces grid peak by shifting DC device load and powering DC devices efficiently without inverters or AC/DC adaptors, together with providing smart control and energy management. The technology aims to address the 1 trillion kwh + lost annually in power conversion, and the significant growing DC demand in homes, offices from ICT, LED lighting and the rise in internet connected devices.

Portfolio highlights

• qomodo — Qomodo: La piattaforma BNPL innovativa. Rate a tasso zero, approvazioni veloci, transazioni sicure. Rivoluzionaria nell'acquisto per aziende e consumatori.
• Omnea — The all-in-one procurement platform. Request purchases, automate approvals, and streamline your procurement process in one centralised solution.
• Dimension — The state of the art collaboration platform for modern engineering teams. Chat, project management, smart actions, and more, accelerated by AI.

Portfolio highlights

• Hubflo — Hubflo is building an all-in-one work OS to help small businesses manage their business. Instead of having 10 complicated and expensive pieces of software, Hubflo offers SMB everything they need to run their business (CRM, projects, invoicing, expenses...) in a single comprehensive, simple and affordable platform.
• FUEL — Where everlasting fanbases are built
• Sidekick — Expertly-managed portfolios for the modern investor

Portfolio highlights

• Audos — Where everyday entrepreneurs build small AI companies
• Qutwo — Europe’s next-generation AI lab for a quantum world.
• Isometric — Isometric is a carbon removal standard and registry.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Alaan — Take control of your business spend.
• Manara — We identify and thoroughly vet undiscovered talent. You hire them directly for onsite or remote jobs, diversifying and accelerating your team. Our mission is to accelerate the growth of the Arab tech sector by untapping its human potential. Did you know that 52% of computer science graduates in Palestine are women? Follow us and visit our websiteto learn more.
• Altruistiq — Altruistiq is a decision-making environment for business sustainability teams.

Portfolio highlights

• MEplace — MEplace creates a new approach to children’s wellbeing and preschool education. MEplace was founded in 2019 and was headquartered in England, UK.
• Two — Buy Now, Pay Later for your business customers. Two makes it easy and safe to offer invoice as a payment method on your e-commerce site.
• Kota — Replace your tools, brokers and outdated processes with the only platform that handles the entire employee benefits journey.

Portfolio highlights

• Yousician — Yousician is a fun way to learn the guitar, piano, bass, ukulele or singing. Enjoy thousands of songs with Yousician as your personal music teacher!
• Absurd:Joy — absurd:joy is bringing joy to remote collaboration with Tangle
• Noice — Join the team build an awesome combo of social x playful x platform.

Portfolio highlights

• Altruistiq — Altruistiq is a decision-making environment for business sustainability teams.

Portfolio highlights

• SiPhox Health — Painless, 5-minute biomarker testing at home. Clear insights, trend tracking, and a personalized plan built around your results.
• Delphi — Delphi turns your expertise into an always-on presence, so you can grow your reach, serve your audience, and lead with clarity, without burning out.
• Cerebras Systems — Cerebras is the go-to platform for fast and effortless AI training. Learn more at cerebras.ai.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Claimer — Claimer is a self-service application that gets credit claims done easily of money spent on research and development. Its platform empowers company owners and advisors to prepare their claims, without any specialist knowledge, no matter how big or small the claim. It also prepares and submits the amended tax return for free.Claimer was founded in2019 by Adam McCann and is headquartered in Croydon, United Kingdom.
• Bondaval — Bondaval insures receivables for the world's best credit teams, so they can extend more credit, win more business and get better financing terms.
• Koos — KOOS is a simple legal and technological solution for motivating and rewarding your community. Boost your growth by sharing success.

Portfolio highlights

• Factored — Factored empowers landlords to access capital, allowing them to effectively meet capital needs, significantly enhance tenant living standards and drastically reduce carbon emissions from their rental properties.

Portfolio highlights

• Kalder — Kalder is a unified web3 brand loyalty platform for brands and creators to drive meaningful engagement, onboard new users, and reward superfan communities.
• Stelia — Stelia builds distributed AI platforms that scale globally. Research-driven intelligent systems for healthcare, education, and enterprise operations worldwide
• Aurora — The Operating System for High Performance Living

Portfolio highlights

• Stackin' — Side Hustles provides a part-time & remote job board and thousands of ideas and gig app reviews to help you start earning side hustle income.
• Evercoin — Evercoin is a mobile application that provides a cryptocurrency exchange service. The application allows users to exchange cryptocurrencies like Bitcoin, Ethereum, Litecoin, Ripple, and Bitcoin Cash. Users can also trade from the safety and control of their own wallet. Evercoin was founded in 2017 and is headquartered in Santa Clara, California.
• Garnet Labs — Protect modern dev/ops environments with behavioral monitoring, threat detection and enforcement. Detect and block unknown threats in real-time before they impact users.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Oxwash — Powered by Vanish, Oxwash provides on-demand laundry and eco-friendly dry cleaning services, creating a simple and sustainable laundry service for all.
• Fundrise — Fundrise helps locals claim ownership in the development of their city. Its first project and the first-ever crowdfunded real estate deal, was the development of acclaimed D.C. restaurant and retail store, Maketto, in 2013. It has grown since then, but its mission of providing people with a simpler, smarter, and more reliable way to invest hasremained the same.Today, Fundrise continues to shape the investment industry, creating a new alternative to investing in stocks and bonds. By combining technology with new federal regulations, they have opened up the once-unattainable world of direct private investments to everyone in the US, regardless of net worth.Fundrise was launched in Washington, D.C. in 2012.

Portfolio highlights

• Tewke — Tewke is a London based company that was founded in 2020 developing technology to deliver energy savings through AI enabled home automation. Tewke's mission is to reduce energy consumption in homes whilst elevating everyone's living experience.Tewke's first product, Tap, is an intelligent light switch that can be installed into anyhome without rewiring. This acts as the backbone of Tewke's energy control and home automation platform, and has already won international awards, such as the Red Dot Design Award.
• Alpaca — Alpaca API allows developers and businesses to build apps, embed investing, and trade algorithms

Portfolio highlights

• Patch App — Patch App UK intends to digitally transform the window cleaning business.

Portfolio highlights

• Blloc — The ultimate smartphone experience. Boost your productivity. Focus on what matters.
• Cordless — Bridging the gap between voice and text
• Heygo — Explore places to visit within the UK and around the world on Rest Less. Get inspired and plan trips to holiday destinations with us.

Portfolio highlights

• Oxwash — Powered by Vanish, Oxwash provides on-demand laundry and eco-friendly dry cleaning services, creating a simple and sustainable laundry service for all.

Portfolio highlights

• Bpacks — Tree bark packaging
• Casecraft AI — CaseCraft is a B2C SaaS platform that simplifies the small claims process with AI-driven automation—making legal claims quick, affordable, and stress-free. No lawyers, no complicated paperwork—just a seamless, user-friendly experience backed by legal expertise.We believe legal support should be accessible, modern, and easy to use—giving you thepower to resolve disputes efficiently from anywhere.

Portfolio highlights

• Hybr — Find your next student accommodation with Hybr, the UK's best student letting platform. Over 5000 happy students served. Click to find your next property.
• Lukango — Lukango takes care of your insurance so you can focus on growing your business, knowing your dream is protected in the right way.
• Klarytee — Klarytee is a SaaS platform that builds security into sensitive content to enable granular control wherever the data goes

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Jua — A new paradigm in weather forecasting. AI learning physics. Delivering accuracy beyond expectation. Covering use cases beyond belief. Accessible to everyone, wherever in the world they are. The world's first end to end deep learning model for weather forecasting, delivered on an intuitive platform for anyone to customise it. Startups,governments and large companies alike can now develop global, high frequency and high accuracy weather models within days.
• Avrios — Digitize your fleet with the ultimate fleet management software. Consolidate your data | automate your tasks | reduce your fleet costs
• Eastnine — Eastnine connected devices and working with exceptional sporting talent, They are building a no bullshit fitness platform with on-demand group training sessions, structured coaching and creative fitness content. They are a community driven club - built by athletes for athletes of all abilities and connecting our members across the globe.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Nova Pangaea Technologies — NPT is a cleantech company that has developed a revolutionary process technology called REFNOVA. REFNOVA allows customers to converts non-food plant residues into sustainable products such as biochar, activated carbon, biofuel, biopolymers and biochemicals. Our products help customers replace fossil based products and enable decarbonisation.

Portfolio highlights

• Verkor — Verkor is a battery cell manufacturer whose goal is to increase the production of low-carbon batteries to fulfill the growing demand for electric vehicles. The company focuses on the development of low-carbon batteries with a carbon footprint that is many times smaller than standard batteries. This reduces the logistics footprint, includingemissions, and provides businesses with batteries that are very inexpensive and use carbon-free electricity.
• Biomicrogels Group — Biomicrogels Group is the developer and patent holder for biomicrogels - a unique substance produced from agricultural waste such as sugar beet, apple, sunflower pomace - capable of addressing the global environmental and climate change problems.The company's biomicrogel-based solutions add value in produced water treatment, cutting fluidseparation, vegetable oil extraction, cleaning of oil spills at sea and on land.We also manufacture a range of environmentally friendly household cleaning products under own brand, WONDERLAB.
• Harbinger — Founded by veterans of Canoo and Faraday Future, Harbinger is an automotive company that develops EV platforms optimized for medium-duty trucks and delivery vans.

Portfolio highlights

• Hydrologiq — Built for fuel providers and asset owners to manage their entire fleet. Makes using hydrogen, battery, or other technologies easy, afforable and scalable. Remote monitoring, delivery planning, and system-wide optimisation in one single platform.

Portfolio highlights

• ARROE — ARROE software extends the lifespan of battery powered electronics, to reduce carbon emissions and e-waste
• MindLabs — Live sleep and meditation classes for your mind. Led by experts. Backed by neuroscience. Now available to download on the App Store.
• Fanbase — Fan engagement software built for the business of sport. Launch digital ticketing, memberships, hospitality packages in a matter of hours.

Portfolio highlights

• Altruistiq — Altruistiq is a decision-making environment for business sustainability teams.

Portfolio highlights

• Bpacks — Tree bark packaging