Greenpixie raises £4.7m to sell cloud carbon data as a cost cut

On 18 May, Greenpixie, a London-based company that measures the energy, carbon and water behind enterprise cloud use, announced a pre-Series A round, which Tech.eu reported at £4.7m. According to the same report, VERBUND X Ventures, the corporate venture arm of the Austrian electricity producer VERBUND, led the round, with Octopus Ventures, Armajaro Holdings and Green Angel Ventures taking part. VERBUND’s own announcement, published the same day, puts the round at £4.5m and names the same four investors.

Greenpixie’s software reads usage data from Amazon Web Services, Microsoft Azure and Google Cloud and attaches emissions, energy and water figures to each line item of a cloud bill. VERBUND said the measurement method is verified to ISO 14064, the international standard for greenhouse gas accounting. It named Mastercard and Unilever as customers, and Flexera and Apptio, the IBM-owned cloud cost tool, as platforms Greenpixie’s data plugs into.

VERBUND’s release also gives a cost figure: it said a case study with Mastercard showed that implementing Greenpixie data “generated savings in the millions within the first nine months”. The release does not put a carbon number next to it.

Greenpixie was set up to count digital emissions, starting with websites. The round shows that what it now sells to large companies is a cloud cost case with emissions attached, bought by the FinOps teams that own the cloud bill rather than by sustainability offices, and backed by an energy company that has its own reasons to understand data center demand.

From a hackathon to the cloud bill

John Ridd, Greenpixie’s chief executive, co-founded the company with William Tinney. Companies House records its incorporation on 8 June 2021, with Ridd as a director and a person with significant control from that day and Tinney as a director since 15 June 2021. No corporate shareholder is registered as controlling it. Ridd previously worked at Infotex, a web design agency.

In a 2023 interview with Infotex, Ridd said the idea came during a hackathon, after he and Tinney, then the company’s chief technology officer, heard that digital emissions made up more than 2% of the global total, more than aviation. Their first prototype estimated the emissions of a website homepage, and an email campaign built on it drew a lot of responses. The company then moved from websites to cloud computing, where, Ridd said, companies renting servers from the big providers create hundreds or even thousands of tons of emissions.

Greenpixie’s first round was £250,000 of pre-seed funding led by Ascension in July 2022, according to Private Equity Wire. Companies House records further share allotments, including in December 2024, April 2025 and March 2026, before the May 2026 round, which at £4.7m is almost 19 times the pre-seed figure.

Why the pitch moved to cost

Ridd was candid about the commercial limits of a green product three years before this round. He told Infotex in 2023 that “doing it for the good of the planet normally doesn’t fly” against other business priorities, arguing that sustainability projects inside companies need cost incentives behind them and that Greenpixie supplies those incentives. He said then that 30% of the servers companies keep running don’t need to be, and that the waste means a 30% overspend.

By May 2026 the company’s website was written for that buyer. Its homepage, archived on 10 May, led with FinOps teams hitting “cost saving targets” and set sustainability data “side-by-side with cloud cost data” for developers. The Mastercard testimonial on the same page came from Vik Saluja, whose title, director of FinOps, TBM and sustainability, folds cloud cost management and sustainability into one job.

Ridd’s statement in the VERBUND release framed the problem in energy terms: “Cloud has become one of the largest and fastest-growing consumers of energy in the enterprise, and AI is accelerating that trend to unprecedented levels.” Tech.eu reported that Greenpixie’s tools help IT teams shut down idle ‘zombie’ resources, choose how AI models are used and pick lower-carbon cloud regions.

What an energy company’s money buys

A lead investor that sells electricity is backing software designed to reduce the electricity data centers draw. VERBUND’s chief executive, Michael Strugl, said: “Greenpixie addresses a structural customer problem in a high-growth market. The rapid validation among international customers and the savings achieved underscore the solution’s scaling potential.” Franz Zöchbauer, managing director of VERBUND X, said the investor group “will play a key role in further accelerating Greenpixie’s growth in international markets”, and singled out Octopus Ventures’ experience of building globally successful technology companies.

According to Tech.eu, Ridd said the funding would help Greenpixie continue its global expansion. Neither announcement gives revenue, a customer count or a valuation, and Greenpixie has not published them. The evidence for demand sits in the named customers, the Mastercard savings claim and the integrations with Flexera and Apptio, which put Greenpixie’s figures inside tools that finance and IT teams already use to manage cloud spend.

A company founded in 2021 to measure the emissions of websites now raises money on the cloud savings its lead investor cites, with an electricity producer leading the round and a Mastercard FinOps director among its references.