French fintech startup WeeFin, known for helping financial institutions simplify and supercharge their ESG strategies, has just secured €25 million in Series B funding. This fresh capital boost was led by BlackFin Capital Partners, with continued support from IRIS, Asterion Ventures, and Ring Capital. The funding is set to fast-track WeeFin’s mission to transform sustainable finance and expand its reach—starting with key European markets like the UK, Luxembourg, and Italy.
With demand surging for ESG compliance and impact-driven investing, WeeFin plans to double down on product innovation and global growth. The funding will support the launch of new platform features, including an ESG performance attribution tool, and beef up the company’s ability to help clients navigate increasingly complex sustainability regulations. The team also aims to grow headcount by 100 over the next three years to keep pace with rising demand.
Making ESG Simpler for Financial Institutions
WeeFin was founded in 2021 by ex-banking professionals Grégoire Hug, Marion Aubert, and Guillaume Klech. The startup delivers a modular SaaS platform that helps banks, asset managers, and insurers centralize their ESG data, impact metrics, and climate strategies. The company already works with over 40 clients managing a massive €6.9 trillion in assets, including big names like Generali Asset Management, Caisse des Dépôts Asset Management, and Groupe BPCE.
What sets WeeFin apart is how its software streamlines every part of the ESG process. From data collection and compliance tracking to sustainability reporting and impact analysis, everything happens in one place. This makes it easier for financial players to align their investment decisions with bold sustainability targets—and do so efficiently.
A Rocketing Growth Story in ESG Tech
WeeFin’s momentum over the past two years shows just how quickly the ESG space is evolving. The startup has grown its Annual Recurring Revenue (ARR) fivefold, and international sales now account for 30% of total revenue—up from zero just two years ago.
Opening a London office marks a big step toward becoming a go-to partner for financial institutions across Europe looking for help with ESG compliance and impact management. With regulators tightening rules and investors pushing for transparency, WeeFin’s value proposition couldn’t be clearer.
Rising Demand for Sustainable Fintech
As sustainability becomes central to financial decision-making, fintechs like WeeFin are playing a crucial role in reshaping the industry. The platform’s ability to offer real-time insights, regulatory updates, and automated impact assessments makes it a powerful tool for institutions under pressure to lead the ESG charge.
WeeFin’s achievements haven’t gone unnoticed. The company was recently featured in Impact 120 by Mouvement Impact France and listed in the 2024 ESG Fintech 100, solidifying its place as one of Europe’s most promising sustainable finance startups.
What’s Next: Scaling Up with a Clear Vision
Armed with new funding and investor backing, WeeFin is focused on expanding its presence in Europe, enhancing its platform, and hiring top talent to support its scaling ambitions. The team believes the future of finance is sustainable, data-driven, and transparent—and they’re building the tools to get us there.
BlackFin Capital Partners’ Partner Julien Creuzé and Investment Manager Chloé Novène praised WeeFin’s execution, saying: “In a short time, they’ve brought on board some of the world’s leading asset managers and achieved standout international traction. We’re proud to back their journey to becoming the top ESG data platform for institutional finance.”
WeeFin CEO Grégoire Hug added: “This round validates our clients’ trust and our belief that sustainability is no longer optional—it’s a core strategic differentiator. With BlackFin on board, we’re ready to amplify our impact across Europe.”
