Doctolib allows patients to book an appointment with one of 17,000-plus medical doctors via its app.
The service, launched by Stanislas Niox-Chateau, Franck Tetzlaff, Ivan Schneider, Jessy Bernal, Thomas Landais and Steve Abou Rjeily, costs €109 per month.
It recently expanded to Berlin and raised €26 million in a Series C round.
"They just signed with the Hôpitaux de Paris," says Alice Zagury, CEO of incubator The Family.
"They are the market leader."