Cloud ecosystem is a term used to describe the complex system of interdependent components that work together to enable cloud services.
The center of a cloud ecosystem is a public cloud provider. It might be an IaaS provider such as Amazon Web Services (AWS) or a SaaS vendor such as Salesforce.
There is no vendor lock-in in the cloud ecosystem.
For example, AWS is the center of its own ecosystem, but it’s also a part of the Salesforce ecosystem. Salesforce runs a number of its services on AWS’s infrastructure.