Carbonfact Acquires Vaayu to Boost Fashion Sustainability Tools

Paris-based environmental data company Carbonfact has acquired Berlin startup Vaayu Tech GmbH in a deal that unites the two most widely deployed sustainability platforms in the apparel and footwear industry. The transaction, announced on May 28, brings together a combined portfolio of more than 300 fashion brands and positions the merged entity as the dominant provider of product-level carbon accounting tools at a moment when regulatory deadlines across the European Union and the United States are accelerating demand for granular emissions data.

The purchase price was not disclosed. The deal marks one of the clearest signals yet that the fragmented ESG compliance software landscape is entering a period of rapid consolidation, driven less by investor exuberance than by the practical reality that fashion companies need a single infrastructure to meet overlapping disclosure mandates from multiple jurisdictions.

Carbonfact was founded in 2021 by Marc Laurent, Martin Daniel, and Romain Champourlier. Laurent, who serves as chief executive, began his career as a venture capitalist and co-founded Kerala Ventures, a seed-stage fund whose portfolio includes Doctolib and PlayPlay, before leaving the investment world in 2020 to pursue climate technology. Champourlier, the company’s chief technology officer, previously served as vice president of engineering at JobTeaser, the European recruitment platform. The company went through Y Combinator and raised a total of $17.1 million across four rounds from investors including Alven, Headline, and Climate Capital. A $15 million Series A round in April 2024, led by Alven with participation from Headline, was earmarked for scaling the platform’s environmental reporting capabilities and expanding international teams.

Vaayu, founded a year earlier in 2020 by Namrata Sandhu, carved out a reputation for building one of the fashion industry’s first automated, product-level carbon measurement tools. Sandhu, a former head of sustainability at Zalando, raised more than $13 million from backers including Atomico, the venture firm founded by Skype co-founder Niklas Zennstrom, CapitalT, and Reddit co-founder Alexis Ohanian’s Seven Seven Six. Vaayu’s platform focused on integrating with external retail systems and presenting environmental impact data directly to consumers. A notable deployment was the “cost per wear” formula developed for Vestiaire Collective, the French designer resale marketplace, which allowed shoppers to calculate the real environmental cost of a purchase on a per-wear basis. That kind of consumer-facing functionality hints at where the combined platform may look to expand beyond back-end compliance.

By acquiring Vaayu, Carbonfact absorbs a client roster that includes names such as Klarna, Missoma, Asket, and Triumph, alongside overlapping relationships with brands like On and Ganni. Existing customers will migrate to the combined platform, which the company says covers product impact measurement, carbon accounting, eco-design, and environmental reporting. The merged database now includes more than 150,000 fashion-specific emissions factors and primary supplier data sourced from more than 7,000 textile factories worldwide.

The strategic logic is straightforward. The deal eliminates a direct competitor in a sector where customer overlap was already significant and where maintaining two parallel data infrastructures would have been difficult to justify as margins tighten across the climate-tech sector. Laurent framed the rationale in operational terms, noting that the fashion industry faces a fundamental data problem that ambition alone cannot solve without the right infrastructure. He pointed to the shift regulators are demanding: away from broad corporate-level emissions disclosures and toward granular, product-level data that tracks environmental impact across individual items and supply chains.

That regulatory pressure is real and mounting. The European Union’s Digital Product Passport framework will require fashion brands to provide detailed environmental data for individual products. France’s Eco-Score regime imposes similar demands at the national level, while California’s SB253 climate disclosure law compels large companies to report Scope 1, 2, and 3 greenhouse gas emissions, creating a powerful incentive for brands to build product-level data infrastructure across complex supply chains. For sustainability teams inside major apparel and footwear companies, these overlapping frameworks create a compliance burden that favors platforms capable of handling multiple regulatory standards simultaneously. The timing of the deal is not coincidental.

The acquisition also fits a broader pattern of consolidation in the ESG software market. Earlier in 2026, UK-based sustainability data platform Dcycle acquired Munich-based AI company ESG-X to strengthen its position in European ESG software. In the same week as the Paris announcement, German ESG providers Code Gaia and Planted merged under a new holding company called House of Gaia, targeting small and medium-sized enterprises. The sector is maturing past the initial startup formation wave of the early 2020s, when EU sustainability regulation fueled a rush of venture funding into carbon accounting tools.

Yet the regulatory environment has not unfolded as neatly as many founders anticipated. Several ambitious EU sustainability measures have been suspended or diluted under the omnibus directive, which pulled back on some of the most demanding disclosure requirements. That political uncertainty has made the market harder for standalone startups with narrow product offerings. Larger platforms can spread compliance costs across a wider user base, invest more heavily in data quality, and offer the breadth of coverage that brands navigating multiple jurisdictions require. The economics of consolidation, in short, have become difficult to ignore.

Carbonfact completes the acquisition at a time when the venture capital appetite for early-stage ESG software has cooled considerably from its peak in 2021 and 2022. The deal reflects a pragmatic recognition that scale matters more in this market than novelty. For Atomico and CapitalT, Vaayu’s backers, the exit provides a resolution for a portfolio company operating in an increasingly winner-take-most vertical. For Alven and Headline, the acquisition reinforces the platform thesis they backed during the Series A.

Sandhu, in a statement accompanying the announcement, said she built Vaayu to give retail and fashion companies the granular, product-level climate data they needed to decarbonize rather than merely report. She described the combination with Carbonfact as an opportunity to deliver that mission at the scale the industry now requires. Neither company disclosed whether Sandhu would take a role within the combined entity or the terms of her departure.

The question now shifts from whether the fashion industry will adopt product-level environmental data tools to which platform will own that infrastructure. With more than 300 brands on a single system, a database of 150,000 emissions factors, and regulatory tailwinds that show no sign of reversing despite political headwinds in Brussels, Carbonfact is betting that the answer is consolidation. Whether it can deliver seamless compliance across jurisdictions while retaining the trust of two formerly rival customer bases will determine if this deal becomes a template for ESG software mergers or a cautionary tale about integration risk.