It is not possible to know exactly how many users use Dolibarr in the world, because Dolibarr is distributed by a lot of alternative channels we don't control. All we can say is that we experience '''3000''' new installations per week, but only from the official web site. Most distributions are done by other channels.
Having more than '''1 million'''
of users around the world may be a good estimate.
A list of declared companies distributing and providing support for Dolibarr is available on wiki page [[List of Dolibarr partners and providers]].