Knowtify - Knowtify.io lets you quickly & easily create personalized, daily or weekly digest emails that keep your users engaged.
Gmail Mail Merge - Send personalized emails with attachments
Dynamically Personalized Emails by QGraph - Hyper-personalized emails for E-commerce
Hiri 365 - Conquer your Inbox. Say #bye to Outlook.
InboxSDK - First usable API to write Gmail Apps for 1B active users
Dynamic Campaigns by Sigstr - Share the most relevant content in every email