In Sapians’ Just Focus podcast, Thibault Lamarque discusses the founding of Castalie, a French pioneer in microfiltered water. He shares his financing strategy—from equity to debt—as well as his vision of entrepreneurship that balances economic performance with environmental impact. The founder of Castalie , in particular, how the company developed a subscription model that enabled the deployment of more than 7,500 water fountains while limiting the need for capital dilution. The episode also discusses his convictions as an investor and his commitment to impact-driven companies.
Key takeaways
- Sustainable development can be a driver of long-term value creation.
- Castalie a pioneer in the microfiltered water industry in France.
- Its business model is based on a recurring subscription and growth driven by a series of successive growth drivers.
- Thibault Lamarque advocates for an investment approach focused on environmental and social impact.
Source: Just Focus Podcast, January 29, 2026
