GMass is a Chrome extension that integrates with Gmail to provide mail merge, automated email sequences, and deliverability tools directly from the user's inbox.
Why it matters
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overview
GMass is an AI-powered email marketing and mail merge tool developed by GMass that enables Gmail and Google Workspace users to send personalized mass emails and automated sequences. It operates as a Chrome extension, transforming Gmail into a robust campaign management platform with features for deliverability and dynamic data integration.
features
GMass provides a comprehensive suite of features designed to enhance email outreach and campaign management directly within Gmail. These capabilities range from advanced personalization to deliverability optimization and automation.
use cases
GMass is primarily utilized by individuals and teams requiring scalable email outreach and campaign management within the Gmail ecosystem. Its features cater to various communication needs, from sales to internal announcements.
how to use
To begin using GMass, users install the Chrome extension and connect it to their Gmail account. Campaigns can then be initiated directly from the Gmail compose window, leveraging Google Sheets for recipient data.
pricing
GMass offers tiered subscription plans, with pricing updated effective January 1, 2026. All plans include core mail merge and tracking features, with higher tiers offering advanced functionalities and priority support. A 7-day trial capped at 50 emails is available, replacing the previous free plan.
Pricing Page
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GMass operates within a competitive landscape of email marketing and mail merge tools that integrate with Gmail. Its primary differentiators include its deep AI capabilities, unlimited follow-up stages, and robust SMTP integration for bypassing Gmail sending limits.
Deeply integrated with Google Sheets for managing recipient data and tracking, and allows sending from Gmail drafts.
YAMM is excellent for simple mail merges from Google Sheets and Gmail drafts but might lack the advanced AI features for template generation and spintax found in GMass. Its daily sending limits are also lower than GMass, which can integrate with third-party services to bypass Gmail limits.
Focuses on simplicity, high deliverability, and real-time tracking for personalized mass emails directly from Gmail.
Mailmeteor offers a very similar core mail merge experience to GMass within Gmail but may not have the same depth of advanced automation features like unlimited auto follow-up stages or AI-powered deliverability suggestions. Its free tier is comparable in daily sending limits.
Combines CRM functionalities directly within Gmail with email tools like mail merge and tracking.
Streak provides a broader CRM solution alongside mail merge, which can be more than what's needed if only email outreach is the goal. While it offers mail merge, its dedicated email sequence capabilities might not be as robust or as central as GMass's. The free tier for mail merge is limited.
Offers advanced email tracking, templates, scheduling, and robust sequence capabilities with CRM integrations.
Mixmax provides powerful email sequences and tracking, similar to GMass, but its free tier is very limited for sequences. The plans that include sequences are significantly more expensive than GMass's entry-level paid plans.
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