Emissions Reporting Boom to Fuel 25.73% CAGR in Carbon Software by 2032

The global carbon accounting software market hit $19.34 billion in 2025. By 2032, it will reach $96.06 billion. That is a compound annual growth rate of 25.73%, according to a February 2026 report from MarkNtel Advisors, and it tells only part of the story. Emissions reporting has crossed a threshold that the sector’s earliest advocates spent a decade trying to reach: the point where governments stop asking companies to measure their greenhouse gas output and start demanding it, with penalties, audit requirements, and filing deadlines that no board of directors can afford to ignore.

The numbers behind the compliance wave are hard to overstate. California’s SB 253 requires any U.S. entity doing business in the state with more than $1 billion in annual revenue to publicly disclose Scope 1 and Scope 2 emissions by August 10, 2026. CARB published a preliminary list in September 2025 identifying 4,160 entities that may fall within scope of SB 253 and its companion law SB 261, with staff estimating roughly 2,600 subject to SB 253 specifically. Scope 3 reporting follows in 2027. Noncompliance can trigger penalties of up to $500,000 per year, though CARB has signaled enforcement discretion for good-faith first-year filings. SB 261, which compels firms above $500 million in revenue to publish biennial climate risk reports, was temporarily paused by a Ninth Circuit injunction in November 2025 but is expected to resume once the appeal concludes.

In Europe, the regulatory architecture is even more developed. The EU’s Corporate Sustainability Reporting Directive began its second wave of enforcement in 2026, pulling in large companies not previously covered by the Non-Financial Reporting Directive. The European Parliament’s December 2025 approval of the Omnibus I simplification package narrowed CSRD’s scope to firms with more than 1,000 employees and at least €450 million in turnover, but the directive still mandates Scope 1, 2, and 3 disclosures under the European Sustainability Reporting Standards. The revised ESRS, expected to be formally adopted in the first half of 2026, will reduce mandatory datapoints by 61%, from roughly 1,100 to around 430, while introducing stricter requirements for Paris Agreement-aligned transition plans and limited assurance. New York State has added its own layer, requiring facilities and fuel suppliers emitting more than 10,000 metric tons of CO2 equivalent annually to begin reporting in 2027.

The result is a compliance pileup unlike anything corporate sustainability teams have faced. Companies operating across California, the EU, and IFRS jurisdictions must reconcile overlapping frameworks with different timelines and assurance standards. Spreadsheets cannot do this at scale. That structural gap has turned carbon accounting software from a voluntary dashboard into financial infrastructure that CFOs budget for alongside ERP and audit systems. The cumulative global market for labeled sustainable debt surpassed $6 trillion by early 2025, and borrowers with sustainability-linked loan covenants must track emissions performance to preserve coupon step-down incentives. Emissions reporting now directly affects a company’s cost of capital.

The venture and M&A activity reflects this shift. Watershed Technology, the San Francisco-based platform used by BlackRock, Walmart, Visa, KKR, and four of the six largest U.S. banks, closed a $100 million Series C in early 2024 at a $1.8 billion valuation, backed by Sequoia Capital, Kleiner Perkins, and Greenoaks. The company reported 1.9 gigatonnes of CO2 equivalent under management by end of 2024, up from 479 million tonnes at the time of the raise, and counts more than 500 customers. Persefoni, the AI-powered carbon measurement platform serving four of the top ten private equity firms, raised $23 million in Series C funding in April 2025 and secured a strategic investment from Diligent in October 2025, which will transition Diligent’s carbon accounting customers onto Persefoni’s platform. Paris-based Greenly, which has raised $78.6 million to date including a $52 million Series B led by Fidelity International Strategic Ventures in March 2024, is expanding into the U.S. market with SB 253 compliance tools alongside its CSRD and CBAM modules. Climatiq closed an $11.7 million Series A in July 2025 to accelerate AI-powered emissions data integration.

Consolidation is accelerating just as fast. In January 2026, Nasdaq-listed Diginex finalized its €55 million acquisition of Berlin-based Plan A, combining Diginex’s RegTech reporting platform with Plan A’s carbon accounting engine and its 1,500-strong client base including BMW, Deutsche Bank, Visa, and Trivago. Osapiens, which closed a $120 million Series B led by Goldman Sachs Alternatives in mid-2024, acquired risk management startup Lucent AI in December 2025. Connect Earth acquired Stockholm-based Datia in September 2025; Position Green bought Brussels-based Greenomy the same month. Workiva had earlier acquired Sustain.Life and integrated it into its reporting cloud. Standalone carbon accounting tools are being absorbed into broader enterprise compliance ecosystems where emissions reporting sits alongside financial disclosure and supply chain governance.

The technology itself is evolving in lockstep. In November 2025, startup Simple launched an AI platform that reads invoices, delivery notes, and purchase orders to automatically calculate real-time CO2-equivalent emissions without manual data entry, targeting the chronic accuracy problems that have plagued Scope 3 emissions reporting. Microsoft’s Cloud for Sustainability was named a leader in IDC’s 2024 MarketScape for Worldwide Carbon Accounting and Management Applications, while IDC ranked Sweep as market leader in its 2025 Vendor MarketScape. Cloud-based deployment accounts for more than 73% of market revenue, driven by SMB-tier solutions now starting as low as $299 per month, down from over $500 just two years ago.

Large enterprises still account for approximately 82% of total market spending, but the fastest-growing cohort is further down the value chain. A midsize components supplier that serves a CSRD-reporting automaker or an SB 253-reporting retailer will increasingly be asked to furnish auditable emissions data whether or not it crosses a regulatory threshold itself. That cascading demand is expanding the addressable market into the small and medium enterprise segment that most vendors are now racing to serve. Energy and utilities captured 32% of market revenue in 2025, but transportation, chemicals, healthcare, and financial services are scaling rapidly as procurement teams embed carbon metrics into supplier scorecards and lending covenants.

North America holds roughly 45% of global market share. Asia Pacific is the fastest-growing region, with China alone accounting for over 28% of the global market in 2023, driven by the scale of its national emissions trading scheme. The geopolitical picture is mixed. The Trump administration’s rollback of federal climate initiatives since January 2025 has made some venture capitalists cautious about new climate tech bets. Yet state-level mandates in California and New York, combined with the extraterritorial reach of the CSRD and IFRS Sustainability Standards, mean most large multinationals cannot opt out of emissions reporting regardless of what happens in Washington.

The market’s trajectory comes down to a straightforward logic. When disclosure is voluntary, companies adopt carbon software selectively. When disclosure is mandatory, audited, and tied to financial penalties, they adopt it universally. The regulatory calendar through 2032 suggests the latter condition is only intensifying.