WeeFin Secures €25 Million to Propel Sustainability in Finance
April 2, 2025, 3:31 am
IRIS
Location: United States, Massachusetts, Groton

Location: France, Ile-de-France, Paris
Employees: 10001+
Founded date: 1816
In a world increasingly focused on sustainability, WeeFin is making waves. The Paris-based fintech has raised €25 million in a funding round led by BlackFin Capital Partners. This investment comes just 15 months after its Series A round, bringing total funding to over €34 million.
Founded in 2021 by Grégoire Hug, Marion Aubert, and Guillaume Klech, WeeFin is not just another startup. It’s a beacon for financial institutions navigating the murky waters of sustainability. The company offers a Software as a Service (SaaS) platform that centralizes crucial data for managing sustainability strategies. This includes Environmental, Social, and Governance (ESG) metrics, climate impact, and more.
WeeFin's client roster is impressive. With over 40 customers across Europe, including heavyweights like Generali Asset Management and Caisse des Dépôts Asset Management, the company is making its mark. Collectively, these clients manage assets worth a staggering €6,900 billion. This isn’t just a number; it’s a testament to the trust financial institutions place in WeeFin’s capabilities.
The funding will be used to enhance WeeFin’s product offerings and expand its international footprint. The company has already made strides in Luxembourg and Italy, and it recently opened an office in the UK. This expansion is not just about geography; it’s about influence. By establishing a presence in key markets, WeeFin aims to solidify its position as a leader in ESG data management.
Sustainability is no longer a buzzword; it’s a business imperative. Financial institutions are increasingly recognizing that integrating sustainability into their strategies is not just good for the planet—it’s good for business. WeeFin is at the forefront of this shift. The company’s platform enables clients to address sustainability challenges at scale, ensuring they remain compliant with evolving regulations.
The growth trajectory of WeeFin is remarkable. In just two years, international sales have surged to account for 30% of total revenue, up from zero. Annual Recurring Revenues (ARR) have increased fivefold in the same period. This rapid growth underscores the demand for robust sustainability solutions in the financial sector.
WeeFin’s management team is a driving force behind its success. Their vision is clear: to establish WeeFin as the leading ESG data management platform for large financial institutions and asset managers. This vision is not just aspirational; it’s backed by a solid strategy and a commitment to innovation.
The new funding will allow WeeFin to optimize existing functionalities and launch innovative modules. One such module will focus on ESG performance attribution, a critical area for clients looking to measure the impact of their investments. By integrating new data sources, WeeFin will enhance its platform’s capabilities, providing clients with better tools to support their investment decisions.
The backing from BlackFin Capital Partners is significant. Their confidence in WeeFin’s management team and vision is a strong endorsement. BlackFin has been following WeeFin since its inception, impressed by its ability to execute an ambitious strategy in a short time. This partnership will provide WeeFin with the resources and expertise needed to navigate the complexities of the financial landscape.
WeeFin is also part of the Impact 120 by Mouvement Impact France, which identifies future impact unicorns. This recognition further solidifies its position as a key player in the fintech space. Additionally, being listed in the 2024 ESG Fintech 100 ranking highlights its commitment to sustainability and innovation.
As the financial sector continues to evolve, the demand for sustainability solutions will only grow. Financial institutions are under pressure to demonstrate their commitment to ESG principles. WeeFin is well-positioned to meet this demand, offering a platform that not only simplifies compliance but also enhances decision-making.
The company’s plans for the future are ambitious. With a goal to double its workforce in the next three years, WeeFin is gearing up for significant growth. This expansion will enable the company to better serve its clients and enhance its product offerings.
In conclusion, WeeFin is more than just a fintech startup; it’s a catalyst for change in the financial industry. With its recent funding, the company is poised to make a lasting impact on how financial institutions approach sustainability. As the world shifts towards a more sustainable future, WeeFin stands ready to lead the charge, providing the tools and insights needed to navigate this new landscape. The journey has just begun, and the horizon looks promising.
Founded in 2021 by Grégoire Hug, Marion Aubert, and Guillaume Klech, WeeFin is not just another startup. It’s a beacon for financial institutions navigating the murky waters of sustainability. The company offers a Software as a Service (SaaS) platform that centralizes crucial data for managing sustainability strategies. This includes Environmental, Social, and Governance (ESG) metrics, climate impact, and more.
WeeFin's client roster is impressive. With over 40 customers across Europe, including heavyweights like Generali Asset Management and Caisse des Dépôts Asset Management, the company is making its mark. Collectively, these clients manage assets worth a staggering €6,900 billion. This isn’t just a number; it’s a testament to the trust financial institutions place in WeeFin’s capabilities.
The funding will be used to enhance WeeFin’s product offerings and expand its international footprint. The company has already made strides in Luxembourg and Italy, and it recently opened an office in the UK. This expansion is not just about geography; it’s about influence. By establishing a presence in key markets, WeeFin aims to solidify its position as a leader in ESG data management.
Sustainability is no longer a buzzword; it’s a business imperative. Financial institutions are increasingly recognizing that integrating sustainability into their strategies is not just good for the planet—it’s good for business. WeeFin is at the forefront of this shift. The company’s platform enables clients to address sustainability challenges at scale, ensuring they remain compliant with evolving regulations.
The growth trajectory of WeeFin is remarkable. In just two years, international sales have surged to account for 30% of total revenue, up from zero. Annual Recurring Revenues (ARR) have increased fivefold in the same period. This rapid growth underscores the demand for robust sustainability solutions in the financial sector.
WeeFin’s management team is a driving force behind its success. Their vision is clear: to establish WeeFin as the leading ESG data management platform for large financial institutions and asset managers. This vision is not just aspirational; it’s backed by a solid strategy and a commitment to innovation.
The new funding will allow WeeFin to optimize existing functionalities and launch innovative modules. One such module will focus on ESG performance attribution, a critical area for clients looking to measure the impact of their investments. By integrating new data sources, WeeFin will enhance its platform’s capabilities, providing clients with better tools to support their investment decisions.
The backing from BlackFin Capital Partners is significant. Their confidence in WeeFin’s management team and vision is a strong endorsement. BlackFin has been following WeeFin since its inception, impressed by its ability to execute an ambitious strategy in a short time. This partnership will provide WeeFin with the resources and expertise needed to navigate the complexities of the financial landscape.
WeeFin is also part of the Impact 120 by Mouvement Impact France, which identifies future impact unicorns. This recognition further solidifies its position as a key player in the fintech space. Additionally, being listed in the 2024 ESG Fintech 100 ranking highlights its commitment to sustainability and innovation.
As the financial sector continues to evolve, the demand for sustainability solutions will only grow. Financial institutions are under pressure to demonstrate their commitment to ESG principles. WeeFin is well-positioned to meet this demand, offering a platform that not only simplifies compliance but also enhances decision-making.
The company’s plans for the future are ambitious. With a goal to double its workforce in the next three years, WeeFin is gearing up for significant growth. This expansion will enable the company to better serve its clients and enhance its product offerings.
In conclusion, WeeFin is more than just a fintech startup; it’s a catalyst for change in the financial industry. With its recent funding, the company is poised to make a lasting impact on how financial institutions approach sustainability. As the world shifts towards a more sustainable future, WeeFin stands ready to lead the charge, providing the tools and insights needed to navigate this new landscape. The journey has just begun, and the horizon looks promising.