Perhaps it depends on where you are, where you users may be, and what you need to host?
(some providers may have FMS with WD, XML, PHP and other web hosting with PHP and SQL)
We have been providing professional FileMaker Hosting for 17 years and offer both shared and virtual dedicated server hosting options. Feel free to contact me privately for more information.
I would look at the closest FileMaker Platinum Partner to your location at
I would check that they have Certified FileMaker Developers and that they have a strong knowledge on how to handle FileMaker Server.