Sweep ESG Platform: Building the System of Record for Carbon Data
Once a company’s auditors, suppliers, and disclosure frameworks all run through the same platform, the switching cost is not a licence fee. It is the integrity of every data point that has already been validated, traced, and reported.
Sweep now manages over one billion tonnes of CO2 data across its customer base. That figure, roughly 3% of global annual emissions, is the kind of number that separates a reporting tool from infrastructure. The Montpellier-founded, Paris-headquartered company has spent the past five years building a sustainability data platform used by L’Oréal, BlackRock, Orange, Crocs, Decathlon, and Thales, among others. Its thesis is straightforward: whoever centralises and governs the ESG data layer for large enterprises will hold a position that is very difficult to displace.
Sweep was co-founded in 2020 by CEO Rachel Delacour and four co-founders, several of whom had previously worked with her at BIME Analytics, a business intelligence SaaS company that Delacour built and sold to Zendesk. The shift to carbon was personal. Delacour has said the idea took shape after a conversation with her son about rising sea levels prompted her to look at how corporations were actually tracking their emissions. What she found was an industry still relying on spreadsheets and consultants to manage data that regulators, investors, and auditors were beginning to treat as mandatory disclosure.
The fundraising trajectory reflected urgency. Sweep raised $100 million in total within roughly a year of its April 2021 public launch: a $5 million seed, a $22 million Series A led by Balderton Capital, and a $73 million Series B led by Coatue Management. Tony Fadell, the inventor of the iPod and co-creator of the iPhone, also participated. At the time of the Series A, it was reported as the largest published raise for any carbon management platform. That kind of capital velocity in climate tech signalled investor conviction that ESG data management was becoming an enterprise software category in its own right, not a feature bolted onto existing compliance tools.
The platform is built around centralising carbon and ESG data from across an organisation and its entire value chain into a single, auditable, framework-aligned system. That covers Scope 1, 2, and 3 emissions, supplier data collection, financed emissions for financial institutions, and reporting mapped to CSRD, SFDR, CDP, GRI, ISSB, and other frameworks. The platform uses AI to automate data ingestion, map indicators, validate inputs, and generate disclosure drafts. In 2024, the company acquired Consequence, a UK-based AI startup, to embed those capabilities more deeply across the platform.
The Scope 3 emphasis is where the company differentiates most clearly. Value chain emissions typically account for 90% or more of a company’s total carbon footprint and are by far the hardest to measure with any precision. Generic industry averages have historically papered over the gap, producing numbers that satisfy a disclosure checkbox but tell a CFO almost nothing actionable. Delacour’s team treats carbon accounting as a network problem. The platform enables companies to collect primary data directly from suppliers, track value chain performance over time, and identify emissions hotspots at a level of granularity that generic factors cannot reach. For financial institutions, a dedicated module handles financed emissions across investment portfolios, supporting position-level reporting.
A recent partnership with HowGood, a product carbon footprint automation company, illustrates where this is heading. The deal integrates a database of over 12 million product-level food emissions factors directly into Sweep’s platform, giving food and agriculture companies ingredient-level and product-level emissions data for Scope 3 accounting. It is a concrete example of ESG reporting moving from company-level aggregates to the kind of granular, SKU-level data that supply chain and procurement teams can actually use. The company has pursued a similar playbook with CFGI, the accounting advisory firm, and Arcadis, the global engineering consultancy, in both cases positioning the platform as data infrastructure that consulting partners wrap services around rather than a tool that competes with advisory firms for the same budget.
Independent analysts have noticed. Sweep was named a Leader in the Verdantix 2026 Green Quadrant for Enterprise Carbon Management, placing in the top eight out of 21 vendors assessed alongside Cority, IBM, Schneider Electric, Sphera, UL Solutions, Watershed, and Wolters Kluwer. It also secured Leader status in the 2026 IDC MarketScape for Carbon Accounting and Management Applications, scoring highest among 17 global vendors. Both reports highlighted value chain emissions management, supply chain engagement, and enterprise-grade data governance as particular strengths. For procurement teams evaluating platforms, dual Leader status across the two most cited analyst benchmarks in the category carries weight.
The competitive field is not short of capital or ambition. Watershed, also a Verdantix 2026 Leader, competes strongly in the US market with deep backing from Silicon Valley and a focus on finance-grade data and complex Scope 3. Persefoni has carved out a strong position in financed emissions for financial services. Normative, Plan A, and Greenly each target different segments and geographies. The more important dynamic, though, is consolidation. IBM acquired Envizi. Nasdaq absorbed Metrio. Diligent took on Accuvio. Sweep’s own acquisition of Consequence fits the same pattern. The market is narrowing from a crowded field of point solutions toward a smaller group of platforms with the breadth and data depth to serve as genuine enterprise infrastructure. That consolidation favours companies that have already secured large, multi-framework, multi-entity deployments, which is precisely where Delacour’s company has concentrated its efforts.
The company now has approximately 223 employees across France, the UK, and the US. It is B Corp certified and holds “entreprise à mission” status in France, a legal designation that binds the business to its stated social and environmental objectives. It is a member of the World Bank’s Carbon Pricing Leadership Coalition and the International Emissions Trading Association. The Financial Times’ Sifted publication previously named it Europe’s fastest-growing scale-up. With CSRD now in force for the largest European companies and California’s SB 253 creating parallel requirements in the US, the regulatory tailwind behind platforms like Sweep is stronger than at any point since the company’s founding.
The billion-tonne milestone is the number worth watching. ESG platforms are plentiful. What is scarce is a centralised, auditable data layer that finance teams trust enough to put in front of regulators and assurance providers. Once a company’s auditors, suppliers, and disclosure frameworks all run through the same platform, the switching cost is not a licence fee. It is the integrity of every data point that has already been validated, traced, and reported. That is the position Sweep is building toward.
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