Interoperability is the ability of a business to connect between multiple platforms and devices in order to exchange information with each other. In cloud it would mean to do so by facilitating exchange of information without the need of external hard drives.
Since we are referring to interoperability, we can’t ignore the unsung hero responsible for modern world’s online connectivity. API- Application Programming Interface.
Read this blog about API Performance Monitoring to know more about it.
For No. 1 cloud based CRM solution refer to Salesforce.