One Green

Vanessa and Jérôme Proust lead the firm directly. They are serial founders who built Glady without venture funding and now apply that bootstrap discipline to One Green's investment process. The website presents them as the sole decision-makers, supported by the 'smart angels' network that co-participates on a deal-by-deal basis.

The firm runs a centralized top-of-funnel that attracts more than 800 investment proposals annually, filtering that inbound flow down to roughly ten commitments. Sourcing relies on the founders' own operator network, combined with the visibility generated by the One Deal Club community of angel co-investors.

One Deal Club is the firm's deal-by-deal co-investment syndicate. Each selected startup receives a combined commitment of 500 K€ to 1 M€ from One Green and a curated group of 'smart angels'. The structure allows portfolio companies to access a broader investor network beyond the firm's own balance sheet while giving angels direct exposure to vetted seed-stage opportunities.

The firm's model is designed to lead or structure seed and pre-Series A rounds, often as the primary institutional investor, with the remainder of the round filled by the angel club. There is no disclosed practice of committing as a limited partner to external venture funds.

One Green concentrates on seed and pre-Series A startups, with a stated preference for B2B SaaS. Portfolio evidence extends the reach into fintech through Karmen, mobility-adjacent travel via Fairjungle, sustainability hardware through Earthwake, and food-service digitization via Dood, though most positions retain a strong software or marketplace component.

Vanessa and Jérôme Proust founded Glady, formerly Wedoogift, and bootstrapped it to become one of France's notable corporate-benefits fintech successes. They exited with the ability to fund One Green's investments personally and to offer portfolio companies operational guidance on non-dilutive scaling, B2B sales, and talent recruitment.

No. One Green does not publish an AUM figure. The firm reports having completed more than 70 investments, but total capital deployed or committed is not disclosed on its website or in its materials.