In July 2021 Challenges estimated Stanislas Niox-Chateau's fortune at €500 million. Doctolib is not listed, so the figure rests on the private valuation of his stake. No later named figure is available.
He co-founded Doctolib in 2013 with Ivan Schneider, Jessy Bernal and Steve Abou Rjeily, and the service began with about 50 practitioners. In November 2014 it raised €4 million, and in January 2017 Bpifrance led a €26 million round.
In March 2019 a €150 million round valued Doctolib at €1 billion. In 2020 the company ran Covid vaccine booking. In March 2022 it raised €500 million at a €5.8 billion valuation.
The company said it was profitable during its 2025 fiscal year. In November 2025 it received a €4.6 million competition fine for abuse of a dominant position. In October 2026 NVIDIA announced it would enter Doctolib's capital.