Businesses Are Using Cloud Apps What are cloud apps? In general, cloud apps are the concept of remotely hosted software and services, provided by a supplier. These suppliers are called cloud providers. Typical cloud apps offered by cloud providers include email, calendar, documents, online storage, sales, customer service, and more. Some of today’s many cloud providers are well known names in industry and include companies such as Amazon, Google, 37signals, Intuit, Microsoft, and Box.