Top Greentech Companies in London (73)
Perk (formerly TravelPerk) is the intelligent platform for travel and spend management. Built to tackle the time-consuming, manual work that gets in the way of real work, our tools automate everything from travel bookings to expenses, invoice processing, and more. By eliminating this shadow work that wastes hours, erodes morale, and saps innovation, we’re on a mission to power real...
Perk's Top Stability & Growth Strengths
Strong Revenue Growth: Revenue is rising at a reported 48% in 2025, with annualized revenue surpassing $300 million and nearing $400 million by August 2026. These figures indicate rapid scaling at a substantial revenue base.
Product Line Growth: The platform has expanded beyond business travel into expenses, invoices, corporate spending, and events, reinforced by the Yokoy acquisition. This broader offering increases opportunities to sell additional services to existing customers.
Market Expansion: Geographic reach is widening, including the U.S. launch of Perk Spend and growth initiatives that made the U.S. account for about 30% of global new business. Additional international moves, such as new offices, support continued growth outside the core markets.
Causeway Connect is a multi-disciplinary firm providing expert ESG consulting, sustainability solutions, and remote staffing services to help businesses grow efficiently.
At British Gas we’re always looking at new ways to save energy and money for our customers. Everything we do from our trusted engineers to helpful call centre agents, and innovative product owners to digital marketing specialists, is about providing affordable, hassle-free service to keep British homes and businesses running smoothly. That’s why over 10 million UK homes and half...
L-Charge provides cutting-edge electric vehicle charging solutions for commercial use, specializing in off-grid charging and Charging as a Service (CaaS). They offer safe, reliable, and scalable EV charger solutions for specialized fleets, such as school bus depots, enabling fast deployment without dependence on utility upgrades. Their units, manufactured in California, comply with EPA, CARB, and SCAQMD emissions standards to ensure...
Levistor develops inherently safe flywheel technology to reduce the costs of high-power, short-duration energy storage. Our inherently safe flywheels require little containment and no safety enclosures or bunkering that flywheels traditionally require to protect people and property in the event of a mechanical fault. This brings down the cost and makes flywheels a viable technology for supply bursts of energy,...
Sellergize Web Technology Services Pvt. Ltd. builds and offers a complete technology stack for affiliate marketers. Its products and services include premium coupon feeds sourced from official communications and affiliate networks, WordPress plugins and REST APIs for coupons and deals, and an integrated solution for coupon, deal, cashback, and price-comparison portals. The company also automates e-commerce store-logo collection and updating,...
Vattenfall is a leading European energy company and a Swedish multinational power company owned by the Swedish state. As one of Europe's largest producers and retailers of electricity and heat, it generates, distributes, and sells energy across several markets. Vattenfall is committed to driving the transition toward a fossil-free energy system and enabling the fossil freedom that drives society forward.
General Fusion develops Magnetized Target Fusion (MTF), an engineering approach intended to make practical commercial fusion power possible. Its systems combine plasma formation, mechanical compression and liquid-metal components to capture and transfer fusion heat. The company builds and operates large-scale demonstration machines, including Lawson Machine 26, to validate the technology and advance toward delivering practical, clean, reliable electricity from fusion...
We are an international, integrated consultancy of engineers, designers and advisers. For over 45 years, we have built an unrivalled reputation by delivering creative, value-led solutions for the benefit of people, places and planet. Described by our clients as ‘passionate’, ‘innovative’ and ‘collaborative’, Buro Happold is synonymous with the delivery of exceptionally complex projects on every continent, working with the world’s leading architectural practices...
The mission of Kiri is to accelerate the adoption of sustainable behaviours. Kiri drastically changes the approach to sustainability by creating a community of forward-thinking consumers and brands, willing to take action together to make the world more sustainable. The Kiri solutions incentivise individuals and brands to behave sustainably, establishing a synergic system in which acting green becomes easy and...
OVO Energy was founded in 2009 and redesigned the energy experience to be fair, effortless, green and simple for all customers. OVO is on a mission through its sustainability strategy Plan Zero to tackle the most important issue of our time; the climate crisis, by bringing our customers with us on the journey towards zero carbon living. OVO Energy has...
GreenScale develops a sustainable data-centre platform for hyperscale, AI and cloud customers. It designs, builds and operates centres in strategic European markets, delivering scalable digital infrastructure with renewable-energy support. The company aims to help stabilize local grids, strengthen energy ecosystems, and contribute positively to communities and economic growth. Its mission is to make sustainable digital infrastructure a foundation for growth...
Ingenie GreenTech delivers strategic sustainability solutions with a radically different approach to managing risks and environmental impact from Digital, Data, and AI. With several decades of technology, digital and data commercialisation expertise, we are driven to contain the ecological impact of the digital economy, while advancing its commercial and social benefits. Our mission is to assist enterprises in making environmentally...
Safi is the new era of TrueCircle. Since we launched in 2021 under the name TrueCircle, we have been on a mission to tackle recycling inefficiency by improving the way we buy and sell recyclables. Safi gives customers access to the best prices and instant expansion into global markets. Through Safi AI, sellers can prove their material quality and drive...
UNiDAYS is the world’s largest Student Affinity Network. With over 29 million verified members across 115 markets, we take 800 of the biggest brands into the hearts and minds of tomorrow’s professionals. UNiDAYS supports, enables and inspires young people to be their best selves, powering next-gen learning, earning and retail experiences. Co-founded by Josh Rathour and CEO, Jon Hawley,...
EDF Renewables North America is a market leading independent power producer and service provider with 35 years of expertise in renewable energy. The Company delivers grid-scale power: wind (onshore and offshore), solar photovoltaic, and storage projects; distribution-scale power: solar and storage; asset optimization: technical, operational, and commercial expertise to maximize performance of generating projects, and onsite solutions, through the Company’s...
EDF Renewable Energy's Top Stability & Growth Strengths
Strong Market Position & Advantage: The company is widely viewed as a top‑tier U.S. developer/IPP and regularly commissions multi‑hundred‑MW wind, solar, and storage projects with a North American portfolio in the tens of gigawatts. A long‑running presence across technologies and a sizable O&M/asset‑optimization platform reinforce its positioning.
Investor Backing & Capital Strength: As the renewables arm of France’s EDF Group, it benefits from a strong balance sheet, procurement leverage, and global experience. Recent multi‑year equipment procurement, equity co‑investment, and project‑level financing underscore bankability and access to capital.
Resilient & Sustainable Growth: Large U.S. projects reached commercial operation in late 2024 (e.g., Fox Squirrel Solar, Morris Ridge, Desert Quartzite solar‑plus‑storage) alongside gigawatt‑scale annual placements. Group disclosures cite EDF Renewables’ EBITDA up ~49% in 2024 with 3.2 GW commissioned, indicating durable expansion.
FIELD is an international builder, owner, operator, of renewable infrastructure. Field will fund, build and run the renewable infrastructure we need to tackle these challenges.
Zero100 is a leading intelligence company that helps senior business and operations executives make critical supply chain investment decisions. Zero100’s approach combines unique IP-led research and data, intimate executive-level events, personalized guidance, and access to an extensive community of influential thinkers and voices from within, and beyond, supply chain.
Veolia UK (part of the Veolia group) provides environmental services including water and wastewater treatment, waste and resource management, and local energy solutions. The company designs decarbonization and resource-regeneration solutions for municipal and industrial customers, focusing on sustainability, pollution control and efficient management of critical resources.
