Compare: MergeMail vs GMass: Powerful mail merge for Gmail

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Metric	MergeMail	GMass: Powerful mail merge for Gmail
User count	30,000	400,000
Average rating	4.88	4.78
Rating count	774	9,154
Last updated	2024-05-14	2026-06-30
Size	1.92 MB	0.30 MB
Version	1.5.2	6.0.43

Short description	MergeMail lets you send and track personalized bulk emails in Gmail using Google Sheets. Features include templates, scheduling, attachments, and unsubscribe links.	GMass transforms Gmail into a powerful mass email and mail merge platform with personalized campaigns, follow-ups, and superior deliverability.
Full summary	MergeMail is a powerful Gmail extension designed to simplify personalized bulk emailing. By integrating Google Sheets, it allows you to manage contacts seamlessly and compose customized emails within Gmail using personalization variables. Key features include mail merge capabilities, email tracking (monitor opens, clicks, and UTM codes), templates for consistent messaging, unsubscribe link support to comply with regulations, attachment inclusion, email previews for accuracy, and scheduling options to send emails at optimal times. Ideal for marketers and professionals, MergeMail offers up to 50 free emails per day, serving as an excellent alternative to tools like Gmass and Yet Another MailMerge (YAMM). Its user-friendly interface and robust functionality make it an essential tool for effective email campaigns within Gmail.	GMass is a robust Chrome extension that turns Gmail into an advanced platform for cold outreach, email marketing, and mail merges. With features like personalized mail merges using Google Sheets data, inbox rotation for sending campaigns across multiple accounts, and high deliverability rates, it helps users send thousands of customized emails efficiently. GMass includes automation options such as triggered emails, auto follow-ups, and recurring campaigns, enhanced by integrations with CRM platforms and Zapier. Safety and spam management are core strengths, with built-in spam testing, free email verification, DKIM support, and bounce/unsubscribe handling. Users benefit from sophisticated campaign tracking—monitoring opens, clicks, replies, and bounces in real-time. Additional utilities include A/B testing, scheduling, email personalization with images and attachments, spintax, countdown timers, quick polls, and seamless compatibility with Grammarly for flawless emails. Used by nearly 400,000 users with a 4.8-star average rating, GMass offers a comprehensive email marketing solution directly within Gmail without needing an external portal.