Looking for a Cloud Service Provider

Hey guys, my manager is asking me to find a reliable cloud service provider. Do you have any recommendation most preferably something that you have actually tried. We just have one requirement we need them to be a member of the Cloud Security Alliance. Thanks in advance and good day to everyone :)

https://www.salesforce.com/uk/blog/2...computing.html

Strong recommendations were given to this one affiliated with cloud security alliance is this any good? We have narrowed down our choices and this one might be considered by the management.