What is GMass and how does it work?

GMass is a Chrome extension that turns Gmail into an email marketing platform. You compose a message in Gmail, select recipients from a Google Sheet or Gmail search, and GMass sends personalized mail merge emails with automatic follow-ups and reporting—all inside Gmail.

How much does GMass cost?

GMass starts at €17/month for the Standard plan (billed monthly) or €215/year. Premium is €35/month, Professional is €52/month. All plans include unlimited emails and contacts.

Is there a free trial?

Yes, GMass offers a free trial. You can start without a credit card and test all features before subscribing.

Who is GMass best for?

GMass is best for salespeople, recruiters, and small businesses who need mail merge, cold email sequences, and campaign reporting directly inside Gmail—without learning a separate platform.

What are the top GMass alternatives?

Popular alternatives include Mailchimp, HubSpot, and Lemlist. However, GMass is unique because it runs entirely inside Gmail via Chrome extension, requiring no CSV imports or separate dashboards.

Does GMass work with Google Sheets?

Yes, GMass reads data live from any Google Sheet and can monitor for new rows to send emails automatically. You can personalize with any column in your spreadsheet.

GMass

Marketing & SEO from €17/mo

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GMass (Marketing & SEO): GMass turns Gmail into a mail merge and cold email platform—send campaigns live from Google Sheets, no separate dashboard needed. Pricing: from €17/mo. (data verified June 2026)

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About GMass

What is GMass?

GMass is a Chrome extension that transforms your Gmail into a full email marketing and cold email platform. Instead of juggling CSV imports, separate ESPs, or complicated interfaces, you just hit Compose in Gmail, enter your list, subject, and message, and GMass sends individually personalized emails using mail merge powered live by Google Sheets. It handles automatic follow-up sequences, behavior-based campaigns, and free email list verification—all inside Gmail.

Who is it for?

GMass is built for salespeople running cold outreach, recruiters sending bulk personalized emails, and small businesses that need campaign management without a dedicated ESP. It’s trusted by 300,000+ users and backed by 5-star reviews. If you want a separate marketing dashboard or need drag-and-drop email builders, GMass is not for you—it works strictly inside Gmail with a minimal learning curve.

Real use cases

Common uses include sending personalized mass emails to prospects from a Google Sheet, setting up automated follow-up sequences that stop when someone replies, and re-targeting segments of past campaigns (like everyone who opened but didn’t click). GMass also breaks Gmail’s daily sending limits using its distribution technology, making it viable for volume senders.

Key features

Mail Merge with Google Sheets — Personalize live from any spreadsheet column, with auto-detected fallback values
Automatic Follow-Ups — Send sequences until a recipient replies to boost response rates
Email List Builder — Find addresses buried in your Gmail just by searching
Behavior-Based Campaigns — Re-target segments like openers or non-clickers from past sends
Reply Management — Auto-categorize replies and bounces to keep your inbox clean
Campaign Reporting — Track opens, clicks, replies, and bounces inside Gmail
Unlimited Email Volume — Break Gmail’s daily limits with distribution technology

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