OVH currently has 15 DC, of those additional 12, most of them are in new region, Australia, Singapore, Germany, US, and I think Japan. That will make 27 DC.
This isn't say they are comparable by size. Not at all. But you make it sounds like OVH is a small player. Linode, Digital Ocean are medium size. According to Netcraft AWS being first, DO recently became second, and OVH being third. But with the lots of $5 - $20VM DO host, those are VM numbers, compared to the Server Size OVH host.
I would also add that since OVH own and operate a large physical network[0], they can't really be compared to a hosting-only provider like DigitalOcean. This isn't 'like for like', and is only marginally useful for ranking either company.
Also, for those of us looking for server space to serve a primarily Western market, OVH and AWS are most definitely comparable. AWS have a huge and impressive range of features, most of which I simply do not need (though I'm a happy OVH, AWS, and DO customer because I'm not one to put all my eggs in one basket).
OVH currently has 15 DC, of those additional 12, most of them are in new region, Australia, Singapore, Germany, US, and I think Japan. That will make 27 DC.
This isn't say they are comparable by size. Not at all. But you make it sounds like OVH is a small player. Linode, Digital Ocean are medium size. According to Netcraft AWS being first, DO recently became second, and OVH being third. But with the lots of $5 - $20VM DO host, those are VM numbers, compared to the Server Size OVH host.