GMass Review 2026

Last reviewed June 2026 by Théo Pascard

GMass

GMass

Cold email and mail merge inside Gmail

Email Sender

Overview

GMass is a Gmail extension that turns your inbox into a cold email and mail merge tool. It pulls recipients from Google Sheets, personalizes at scale, and handles scheduling and automated follow-ups without ever leaving Gmail. It is popular with solo operators and small teams who want sending power without learning a separate sales platform. It is not a full sales-engagement suite, and everything runs through your Gmail account.

Who it's for

  • →Solo founders and creators sending outreach from Gmail
  • →Small teams already living in Google Workspace
  • →Anyone running mail merges off a Google Sheet
  • →Light cold email and follow-up campaigns

Not for

Teams needing multichannel cadences beyond email · Orgs wanting deep CRM integration and reporting · High-volume senders past Gmail sending limits · Buyers wanting a dedicated sales-engagement platform

Capabilities

  • Send mass personalized email directly from Gmail
  • Mail merge driven by Google Sheets columns
  • Automated follow-up sequences based on opens and replies
  • Schedule sends and throttle daily volume
  • Open, click, and reply tracking with reports
  • Built-in list verification and inbox rotation

Ratings & reviews

4.7
1,299 reviews ↗
5★
1,143
4★
156
3★
0
2★
0
1★
0

👍 Pros

Runs natively inside Gmail Simple mail merge and personalization Unlimited sending on paid plans Scheduling and automated follow-ups Responsive support and solid docs

👎 Cons

Learning curve for Sheets and merge tags Tied to Gmail sending limits Pricier than basic email tools Merge fields occasionally need testing

Pricing

TierPriceCredits / moNotes
Standard$25/mo—Individual plan, unlimited emails, mail merge, scheduling, follow-ups
Premium$35/mo—Individual plan, adds behavior-based automated sequences and triggers
Professional$55/mo—Individual plan, full feature set including API access
TeamCustom—Per-seat pricing for multiple users, billed by number of seats

The honest take

Where it breaks

GMass lives entirely inside Gmail, so it inherits Gmail's daily sending limits and offers no channels beyond email. Teams that need multichannel cadences, CRM-grade reporting, or volume past Gmail's ceiling will outgrow it.

The verdict

GMass is the most natural choice for solos and small teams who want cold email and mail merge without leaving Gmail. It is simple, well-supported, and affordable for what it does, but it stays a sending tool rather than a sales platform. Pick it when Gmail-native simplicity matters more than multichannel reach or CRM depth.

FAQ

Does GMass work outside Gmail?

No. GMass is a Gmail and Google Workspace extension and sends through your Google account, so it requires Gmail to operate.

Is there a sending limit?

GMass itself does not cap volume, but your sends are bound by Gmail's own daily sending limits, which vary by account type.

How is GMass priced?

Individual plans start at $25/month (Standard), with Premium at $35 and Professional at $55. Team plans are priced per seat.

Can it do automated follow-ups?

Yes. GMass can send sequences of follow-ups automatically and stop when a recipient replies.

Is GMass a CRM or sales platform?

No. It is a focused email-sending and mail merge tool, not a multichannel sales-engagement platform with CRM depth.

We run this stack for B2B teams

Skip the months of trial and error. We build the GTM system that books meetings.

Book a GTM audit →