Quentin de Metz is one of three co-founders of Pennylane. The other two are Arthur Waller, who became chief executive, and Thierry Deo.
The company launched in 2020 with a €4 million round in May. A €15 million Series A followed in January 2021, and another €15 million six months later when Sequoia joined. In 2021 the team briefly offered its own accounting service, then sold it to an independent firm to stay a software platform.
A €50 million Series B came in January 2022. In February 2024 a €40 million round valued the company at €1 billion. In April 2025 it raised €75 million from Meritech and CapitalG.
In January 2026 Pennylane raised €175 million from TCV and Blackstone Growth at a valuation above €3.5 billion. Annual recurring revenue reached about €115 million in December 2025. Founder preference shares carry 51% of the votes.