Doctolib is a B2B model. Patients are not the customers; medical practices are the customers. Doctolib saves on the cost of a medical secretary, which is why it is so popular.

What's more, this is a sensitive and regulated field, where trust is essential. They can't afford to mess around if they don't want to quickly find themselves subject to moe restrictive regulations.

They were heavily criticised in France because they allowed charlatans and people with no medical training to register (particularly for Botox injections). As soon as this became known, they quickly rectified the situation.