This table is just a quick comparison for the types of services that the major cloud providers offer as of the posting date. This is by no means a comprehensive comparison, as I am sure there are other providers and types of services I’m not listing. And I’m not being feature or platform specific either. For instance I realize that Google’s App Engine and Windows Azure don’t allow for the same development platforms. But they do provide a similar service at a high level. Also I’m sure the features for each category vary by provider.
|App Platform||Azure||App Engine||Cloud Sites|
|Relational DB||SQLAzure||RDS||Cloud Sites|
|Blob Storage||Azure||S3||App Engine||Cloud Files|
|Table Storage||Azure||SimpleDB||App Engine|
|Pure VM||planned||EC2||Cloud Servers|
|CDN||Azure CDN||Cloudfront||Cloud Files|
|On-Premise||planned||App Engine||Open Stack|