Your are evaluating cloud solutions, which vendor do you go with? If you were building your own application you would look at Amazon, Rackspace, ninefold and a myriad of others. If your choosing a CRM or ERP then your choice is (often) limited to whomever the vendor has teamed with. Whatever the situation, here are the key areas you need to evaluate providers against.
Reputation – get a customer list and call some of them up. Focus your efforts on companies your size.
Security – there’s a lot of security standards, make sure that you are comfortable with the suppliers processes and procedures.
Flexibility – look for providers that allow you to add your specific needs, plus the ability to add and take down servers ‘on the fly’.
Pricing – work out costs before you implement and ensure that there is a standardised price list.
Recovery – make sure the data recovery plan is good( minimum of a second location). Also, if the provider goes out of business or their service drops, that you have the ability to switch providers.
Failover - Cloud Platforms have built-in failover. How does the provider plans for failures on premise as well as off premise and make sure this matches to your needs.
Environment – if this is important to your business, ensure that the provider gets audited by a relevent body.
Test – test the provider on a small service before moving all your business systems across.