Gmass

GMass is an email automation and mail merge tool that works directly inside Gmail, enabling users to send personalized mass emails and manage campaigns without leaving their inbox. It connects to Google Sheets and CSV files to create data-driven campaigns, allowing each recipient to receive customized content such as names, company details, or unique links. Users can schedule emails for specific dates and times, set up recurring campaigns, and automate follow-ups based on recipient behavior, such as opens, clicks, or no response.

The tool supports high-volume sending while using Gmail’s familiar interface, and offers features like open and click tracking, reply tracking, and bounce detection to monitor performance. GMass also includes list management tools, such as automatic suppression lists, unsubscribe handling, and duplicate detection to maintain clean, compliant mailing lists. Campaigns can be A/B tested to compare subject lines or content variations.