SAN FRANCISCO—Apple Inc. and Salesforce.com Inc. are entering a partnership in which the iPhone maker will help Salesforce build the iPhone maker’s features such as its Siri voice assistant deeper into Salesforce’s own mobile apps, which are widely used in the sales and marketing industries.
In exchange, Salesforce will make software tools so that the big businesses that use its back-end technology to power their own apps can build better products with features specific to iPhones and iPads.
