Salesforce is expanding its Marketing and Commerce Cloud by acquiring Rebel, a startup that develops interactive email services for business use, according to TechCrunch.

The details: Rebel will integrate its API-based services, Rebel said a statement. Terms of the deal have not been disclosed. It is unclear if Rebel will still provide its services to its current partners like IBM, Oracle, SailThru and others. Salesforce has been acquiring a number of companies to expand its marketing services to go up against Adobe and others.