That depends. A lot of web developing companies have their own servers, unless those companies are non-web related, and they choose another organization to host their site remotely. (This is usually the case for small business or starting business.)The best way I think is if you just go for an an application service provider that supports whatever you want. The only drawback is that you will not be in full control of the server, and you might need some additional tech support to see how they function, depending on the complexity of your application.