Paris, France-based Doctolib, an online doctor’s appointment booking app and management software company, has raised $28 million (26 million euros) in series C funding in a round led by BPI France. Existing investors Accel, Pierre Kosciusko-Morizet, cofounder of PriceMinister, and BlaBlaCar cofounder Nicolas Brusson also contributed. In 2015, the company raised $20 million (18 million euros), and the latest funding will be used to further establish Doctolib’s presence in Europe.

Doctolib, which was founded in 2013, offers its subscription-based SaaS platform across France and Germany to medical practices or hospitals of varying sizes as well as patients. Doctors can use Doctolib to manage their appointment bookings and communicate with patients, and patients can locate doctors and services and track their appointments.

For doctors, the service costs $116 (109 euros) per month, but it’s free for patients to use. At launch, Doctolib had 50 practitioners on the platform, but now boasts 17,000 doctors and 435 health facilities and draws 6 million visits to its site per month. After operating only in France for the first couple of years, it expanded its services in Germany in May 2016. Ultimately, the company aims to serve up to 500 million Europeans.

It’s not the only doctor-booking startup in Europe, and it’s not the only one raising money, either. Poland-based DocPlanner raised $20 million last June and merged with Barcelona, Spain-based competitor Doctoralia. DocPlanner’s strongest market is in Europe, but operates in 25 countries around the world, including some in Asia and South America. Luxembourg-based online booking platform Doctena acquired German competitor Doxter in November, and all companies are apparently vying for the leadership position in the digital European medical-booking space.