The Yesware for O365 add-in (Email Tracking from Yesware) includes Email Tracking, Templates, Campaigns and Salesforce Sync using Microsoft’s latest technologies for add-ins. It is supported on Windows and Mac desktop versions of Outlook and the Outlook Web App. This is the best choice if you’re a Mac user but also if you’re looking to use Outlook on the web.
Yesware for Outlook uses an older technology called COM (Component Object Model) and is supported on only Windows desktop versions of Outlook. It includes Email Tracking, Templates, Salesforce Sync and our old version of Campaigns: Mail Merge.