Amazon Web Services (AWS) is a comprehensive, evolving cloud computing platform provided by Amazon that includes a mixture of infrastructure as a service (IaaS), platform as a service (PaaS) and packaged software as a service (SaaS) offerings.
Microsoft Office 365 provides web, desktop, and mobile apps for Outlook, Word, Excel, PowerPoint, OneNote, Publisher, Skype, OneDrive, Exchange Online, and more.
Salesforce Heroku is part of the Salesforce Platform, enabling enterprises to store and leverage customer data in Salesforce for full-cycle CRM engagement.