GMass
Email campaigns sent from inside Gmail
GMass is an email outreach tool that operates inside Gmail, enabling users to send newsletters, announcements, cold email campaigns, and transactional email. It solves the problem of managing large-scale sending from a standard Gmail account, where daily sending limits can interrupt campaigns. As recipient counts grow, delivery can shift from native Gmail to inbox rotation or SMTP to keep campaigns moving.
Key capabilities include mail merge with Google Sheets, scheduling, open and click tracking, unsubscribe links, and auto follow-up sequences with unlimited stages. GMass handles Gmail sending limits through distributed scheduling, automatic rerouting through its own SMTP server, or connecting a user's own third-party SMTP server. Additional features include speed throttling, bounce resending, alias addresses for large recipient lists, embedded images, and selective click-tracking exclusions.
GMass is built for individuals and organizations sending email at varying scales, from small teams to larger operations. It is installed as a browser extension through the Chrome Web Store or Google Workspace Marketplace. High-volume SMTP senders may incur additional pricing.
12 alternatives to GMass
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