Climate tech startups in London

Christian Hernandez, Jacob Bro & Nicole LeBlanc (founding partners)

Founded 2019; climate VC investing in the 'urban stack' — energy, industrial decarbonisation, advanced manufacturing, mobility and urban systems. Closed a €210M Fund II in Jan 2026, bringing AUM to €500M; an...

Jevan Nagarajah

Founded 2019; uses precision fermentation to make animal-free dairy proteins molecularly identical to conventional dairy, focused on hard aged cheeses. Raised a ~$22M Series A in 2022 to scale its East Londo...

Hayden Wood & Amit Gudka

Founded 2015; fast-growing 100% renewable-electricity supplier that reached ~1.7M customers and the UK's 7th-largest supplier before collapsing into special administration in Nov 2021 amid the gas-price cris...

Adam Hearne & Roheet Shah

Founded 2019 (Y Combinator S20); AI-driven carbon accounting for carbon-intensive supply chains — manufacturing, commodities and heavy industry. Raised a $10M Series A in April 2023 co-led by Union Square Ve...

Ben Gleisner

FLAG — HQ Wellington, NZ. Founded 2010; carbon-footprint tracking embedded in banking apps (NatWest, ING, CommBank, Westpac). Raised a ~$20M Series A ahead of COP26 and operates across 12 countries with a si...

Marta Krupinska, Gabrielle Walker & Mark Stevenson

Founded 2022 by Azimo co-founder Marta Krupinska with climate scientist Dr Gabrielle Walker; a market-making platform building diversified, high-quality carbon-removal portfolios for corporate buyers. Raised...

Amit Gudka

Founded 2021 by Bulb co-founder Amit Gudka; develops and operates grid-scale battery energy storage across the UK and Western Europe. Secured £77M in 2022 (Plural, Triple Point, LocalGlobe) and a £200M inves...

Javier Cavada (CEO)

Long-duration energy storage pioneer commercialising liquid air energy storage (LAES). Raised £300M in June 2024 (UK Infrastructure Bank, Centrica, Rio Tinto, Goldman Sachs, KIRKBI, Mosaic) to build a 300MWh...

Eamon Jubbawy

Founded 2022 by Onfido co-founder Eamon Jubbawy; independent registry and open science platform for durable carbon dioxide removal. Raised a $25M seed in July 2023 (Lowercarbon Capital, Plural) — one of the ...

spun out of OVO (Stephen Fitzpatrick)

Energy intelligence & flexibility software platform spun out of OVO; optimises smart charging, heat and grid balancing for utilities including OVO, AGL, ENGIE and OEMs (Volvo, VW). AGL invested $100M in 2024...

Rob Trezona (Founding Partner)

Evergreen cleantech investment platform (~$450M / £375M) backed by IP Group, funding hard-tech climate companies from research breakthrough through scale — able to invest very early and keep backing companie...

Natalia Dorfman, Paul Young & Thomas Merriman

FLAG — HQ Cambridge, not London. Founded Dec 2021 via the Carbon13 climate venture builder; a specialist carbon-credit insurer de-risking carbon purchases. Raised a £4M seed in early 2023 led by Octopus Vent...

Nicholas Chadwick, Shiladitya Ghosh & Gaël Gobaille-Shaw

Founded 2020; energy-efficient, modular direct air capture using electrochemical CO2 separation. Raised a £21.8M Series A in March 2024 (2150, World Fund, Fortescue, Siemens Financial Services, Breakthrough ...

Quentin Draper-Scrimshire & Tim Overton

Founded 2019; market-intelligence and benchmarking platform for battery energy storage and grid flexibility assets. Raised ~$15M Series A in late 2023 (MMC Ventures, Triple Point, Molten) and a Series B in D...

Stefano Buono

FLAG — HQ MOVED OUT OF LONDON. Founded 2021 by Italian physicist Stefano Buono to develop MOX-fuelled, lead-cooled fast reactors; Europe's only nuclear unicorn, having raised €500M+ from 700+ investors. Relo...

Pierre Paslier & Rodrigo Garcia Gonzalez

Founded 2014 (Imperial/RCA spinout); seaweed-and-plant-based packaging (the 'Ooho' edible bubble, coatings, films) that is biodegradable and recognised as plastic-free under the EU Single-Use Plastics Direct...

Greg Jackson

Founded 2016; UK's largest domestic energy supplier (14M+ accounts across 8M households, active in 27 countries) built on its in-house Kraken customer/operations platform. Valued at over $9B by 2024 after ra...

Victor Dewulf & Peter Hedley

Founded 2019 (Imperial spinout); AI-powered computer vision and robotics for waste sorting in material recovery facilities. Raised a $17M Series A in Feb 2023 led by DCVC (Promus, Playfair, MMC, Creator Fund...

thermal imaging)

London spacetech (founded 2016) building a constellation of high-resolution thermal-infrared satellites to monitor heat, energy efficiency and industrial activity day and night. Raised ~£30m in 2025/26 (tota...

Michelle You & Aaron Randall

Founded 2021 by Songkick co-founder Michelle You; a vetted carbon-removal marketplace helping tech firms reach net zero. Raised a $13M Series A in June 2023 led by Lightspeed (RTP Global, Greencode, MMC, Loc...

Allister Furey & Sam Gill

Founded 2020; carbon-credit ratings, pricing data and market intelligence for corporates with net-zero targets. Raised a $57M Series B in July 2023 (Balderton, Bain, Fidelity Strategic Ventures, Index, Insig...

Jeremy Oppenheim, Paul Polman & Irena Spazzapan

Early-stage climate-tech VC spun out of advisory firm SYSTEMIQ. Reached a $70M first close of Fund II in 2022 (targeting $200M), investing across sustainable food & materials, climate intelligence & finance,...

James Basden, Nicholas Beatty & Steven Meersman

Founded 2017; EV fleet electrification specialist and grid-scale battery operator. Largest owner/operator of electric buses in the UK, Australia and NZ (~25% UK e-bus share) with 735MW+ of storage operating ...