ClimateOS: The Paris Startup Securing €28M to Transform Industrial Emissions Tracking

In a cluttered co-working space above a vintage café on Rue de Turenne in the Marais, a team of fifteen engineers has spent the last eighteen months building software that large industrial facilities actually want to use. This month, ClimateOS announced a Series B funding round of €28 million, led by Partech and joined by existing backers Raise Ventures and Arianne Tech—a signal that Paris's deep-tech ecosystem is maturing beyond consumer apps and into climate solutions that move real capital.

ClimateOS solves a deceptively complex problem: European factories, refineries, and chemical plants are drowning in compliance requirements under the EU Emissions Trading System and emerging carbon border adjustment mechanisms. Tracking emissions across thousands of machines, supply chains, and processes has traditionally meant hiring armies of consultants or maintaining clunky legacy spreadsheets. The company's platform integrates directly with industrial sensors, IoT devices, and enterprise systems to generate real-time emissions dashboards and automated compliance reports.

"We're not selling sustainability—we're selling operational clarity and cost reduction," explains the team's head of product. The platform reportedly helps clients identify inefficiencies that translate into concrete savings; early customers at mid-sized manufacturing firms have reduced energy consumption by 12-18 percent within six months of deployment, according to internal data shared with investors.

What makes ClimateOS noteworthy in the current funding climate isn't just the cheque size. With venture capital increasingly cautious about unprofitable growth narratives, ClimateOS achieved revenue profitability in Q1 2026—roughly three years after launch—while maintaining 40 percent annual recurring revenue growth. For a hardware-software hybrid business in a regulated industrial sector, that trajectory is exceptionally rare. The firm counts three major European manufacturers and a pan-continental chemical distributor among its paying customers.

The timing reflects broader shifts in Paris's tech investment landscape. Ten years ago, the city's startup scene was dominated by B2C commerce plays and fintech. Today, as climate regulations tighten and corporate pressure mounts, deep-tech founders tackling industrial decarbonization are finding a more receptive audience among LPs and corporate venture arms. Partech's participation signals confidence not just in ClimateOS but in the broader segment of climate-tech infrastructure plays.

With fresh capital, the company plans to expand its engineering team and accelerate product development around Scope 3 emissions tracking—the notoriously thorny challenge of monitoring supply-chain carbon. If ClimateOS succeeds, it may prove that Paris's next generation of unicorns won't come from disrupting consumer habits, but from quietly remaking how Europe's industrial base operates.

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