Paris is no longer just a political capital for climate commitments it has become a practical engine for climate and ESG innovation. From carbon accounting platforms to circular manufacturing and clean energy, Paris-based startups are turning sustainability from ambition into execution. What sets these companies apart is not only technology, but their ability to blend climate impact with commercial scale. Below are ten Paris-based Climate and ESG startups that are shaping how businesses, industries, and consumers respond to the climate challenge.
Sweep — Making Corporate Climate Action Measurable
For many companies, climate commitments fall apart when it comes to measurement. Sweep addresses that gap. Its platform helps organizations track carbon emissions, manage ESG data, and collaborate across supply chains. Used by large enterprises and fast-growing companies alike, Sweep has become a reference name in corporate climate transparency.
Back Market — Turning Circular Economy into a Mass Movement
Rather than producing something new, Back Market focuses on extending the life of what already exists. By selling refurbished electronics at scale, the company has made the circular economy mainstream. Its impact goes beyond emissions reduction Back Market has changed how consumers think about ownership, waste, and value.
EcoVadis — Setting the Standard for ESG Ratings
EcoVadis plays a quiet but powerful role in global sustainability. Its ESG ratings are used by thousands of companies to assess suppliers on environmental, social, and ethical performance. In a world where supply chain transparency is becoming non-negotiable, EcoVadis has positioned itself as a trusted global benchmark.
Greenly — Simplifying Carbon Accounting
Climate reporting can feel overwhelming, especially for smaller companies. Greenly makes carbon accounting accessible by translating complex data into clear insights. The platform helps businesses understand their emissions, meet regulatory requirements, and take meaningful steps toward reduction without needing a full sustainability team.
Ÿnsect — Rethinking Protein for a Low-Carbon World
Food systems are among the largest contributors to climate change. Ÿnsect tackles this problem by producing insect-based protein for animal feed and agriculture. Its industrial-scale facilities demonstrate how alternative proteins can reduce land use, water consumption, and emissions while supporting food security.
Plan A — Helping Companies Decarbonize, Not Just Report
With a strong presence in Paris, Plan A goes beyond ESG reporting. The company helps organizations build credible decarbonization strategies using science-based targets. Its platform combines emissions data, regulatory compliance, and action planning helping sustainability teams move from reporting to results.
Metron — Cutting Industrial Energy Waste
Heavy industry is one of the hardest sectors to decarbonize. Metron uses data and AI to optimize energy use in factories and infrastructure. By identifying inefficiencies in real time, the company delivers immediate emissions reductions while also lowering energy costs an approach that resonates strongly with industrial clients.
Fairmat — Giving Advanced Materials a Second Life
Composite materials like carbon fiber are essential in aerospace and automotive industries but notoriously difficult to recycle. Fairmat has developed a solution that allows these materials to be reused instead of discarded. Its work supports a more circular manufacturing model and reduces dependence on virgin raw materials.
ClimateSeed — Bringing Credibility to Climate Contributions
As carbon markets grow, so does skepticism. ClimateSeed focuses on quality and transparency, connecting companies with verified climate projects around the world. The platform helps businesses contribute to climate action responsibly, while also supporting biodiversity and local communities.
Lhyfe — Building the Green Hydrogen Economy
Decarbonizing heavy transport and industry requires alternatives to fossil fuels. Lhyfe is developing green hydrogen produced using renewable energy. With projects across France and Europe, the company is positioning itself as a key player in the future of clean energy infrastructure.
Why Paris Is Becoming a ClimateTech Capital
Paris benefits from a rare combination of policy leadership, climate-focused investors, research institutions, and entrepreneurial talent. As ESG regulations tighten across Europe, startups based in the city are not just complying they are helping define how sustainability is measured, financed, and implemented. These companies prove that climate action and business growth are no longer opposing forces.
Closing Perspective
The next decade of climate innovation will not be driven by promises, but by execution. Paris’s Climate and ESG startups are already delivering solutions that reduce emissions, improve transparency, and reshape entire industries. For investors, corporations, and policymakers, this ecosystem represents one of Europe’s most credible paths toward a low-carbon future.