Gmass Review
Gmass
Mail merge and mass email for Gmail
GMass runs personalized cold email and mail-merge campaigns directly inside Gmail, pulling from Google Sheets with automated follow-ups, tracking, and higher sending limits.
Updated Jun 02, 2026
What is Gmass?
GMass is a cold email and mail-merge tool built into Gmail. It turns the Gmail compose window into a campaign sender, personalizing messages from Google Sheets and handling the sending limits that normally cap outreach from a regular inbox.
It is handy for newsletters, cold email campaigns, and personalized announcements, with automated follow-ups and list building. Because it lives in Gmail, there is little to learn and campaigns can go out almost immediately after setup.
GMass fits the stack as a Gmail and Google Sheets sending extension rather than a CRM or enrichment tool. It is best used purely for mass and personalized emailing inside Gmail.
See how teams use Gmass
- Turn Gmail into a cold email platform
- Mail-merge campaigns from Google Sheets
- Send automated follow-ups from Gmail
- Break Gmail's sending limits safely
- Verify lists and reduce spam
- Track open and reply rates in Gmail
Pros
- Turn Gmail into email platform.
- Mail merge with Google Sheets.
- Verifies lists and fix spam.
- Sends automated follow-ups.
- Break Gmail’s sending limits.
Cons
- Some advanced features are locked behind higher-tier plans.
- Initial setup and onboarding may take time for new users.
- Best long-term value typically requires annual billing.
What people say about Gmass
- G2 Read reviews
Verified B2B software reviews from real buyers.
- Capterra Read reviews
Buyer-focused reviews from software professionals.
- Trustpilot Read reviews
Independent consumer reviews and trust signals.
- Product Hunt Read reviews
Community votes, comments, and launch feedback.
Frequently asked questions
How to use Gmass?
Hit Compose in Gmail, enter your list, subject, and message, then send personalized mass emails directly from Gmail.
How much is Gmass?
Pricing starts at $18/month (billed annually) for Standard, $27/month for Premium, and $43/month for Professional plans.
Why choose Gmass?
GMass automates email campaigns inside Gmail with unlimited emails, personalization, follow-ups, and inbox-friendly deliverability.
How does Gmass work?
It integrates with Gmail and Google Sheets to send personalized emails, automate follow-ups, and track campaign analytics.
Is Gmass free?
GMass offers a free trial to test features, but full access requires a paid subscription.
Is Gmass a partner?
GMass supports integrations like Zapier API access but does not specify partner programs publicly.
How to learn Gmass?
Start with the quickstart guide and support resources to send your first mail merge in minutes.
What are Gmass alternatives?
Alternatives include traditional email marketing tools but GMass uniquely works inside Gmail with powerful personalization.
What are Gmass reviews?
GMass has over 300,000 users and thousands of 5-star reviews praising ease and power for email campaigns.
Does Gmass have an API?
Yes, GMass offers API access with Zapier integration for advanced automation.
Does Gmass have a trial or a demo?
Yes, GMass provides a free trial to experience features before subscribing.
About 1SecondLeads
Outbound systems for teams that need pipeline.
We help B2B teams build outbound workflows across targeting, data, messaging, inbox infrastructure, and campaign execution.
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