GMass
Gmail-native mail merge.
From $29.95/mo Free trial API
Bottom line
Mail merge and cold email that runs inside Gmail. Standard is $29.95/mo, or $20/mo billed yearly at $249.
Stands out for: Every plan sends unlimited emails from your own Gmail account and includes free address verification.
Watch out for: Standard has no follow-up sequences, A/B tests or API. Those start on Premium at $39.95/mo, and inbox rotation needs Professional.
Overview
GMass is a Chrome extension that turns Gmail into a mail merge and cold email tool. Standard is $29.95/month, or $20/month billed yearly at $249, with unlimited emails, contacts and campaigns, personalization, tracking links and free address verification. Premium is $39.95/month, or $29 billed yearly, and adds follow-up sequences, the API with Zapier, A/B tests and triggered emails. Professional adds inbox rotation.
Teams pick GMass when the inbox is already Gmail and they want campaigns without a separate sending app. Professional is $59.95/month, or $49 billed yearly, with inbox rotation (MultiSend) and priority support, and team plans cost more. AI tools help with spam checks, spintax and template building. You can try GMass free with no card, and the API is documented for Premium and higher plans.
Who it's for
Best for
- People who already send from Gmail
- Small teams running mail merges
- Senders who want follow-ups on Premium
- Teams that later need inbox rotation
Not ideal for
- Teams not on Gmail or Google Workspace
- Buyers who need sequences on the cheapest plan
Key features
Gmail. Gmail-native workflows for desks that live in Google.
Merge. Merge duplicate candidates without wrecking history.
Screenshots
GMass button in Gmail
Mail merge personalization
Web-based campaign report
List from Gmail search
Behavior-based campaign setup
Settings box
Images: GMass's own website. Select an image to see it full size.
Pricing
| Plan | Price | What you get |
|---|---|---|
| Standard | $29.95/mo | $20/mo billed yearly |
| Premium | $39.95/mo | $29/mo yearly, adds sequences and the API |
| Professional | $59.95/mo | $49/mo yearly, adds inbox rotation |
Standard is $29.95/month, or $20/month billed yearly ($249). Premium is $39.95/month ($29 yearly) and adds sequences and the API. Professional is $59.95/month ($49 yearly) with inbox rotation, and team plans cost more. Confirm current terms on the vendor site.
Checked 19 Sep 2026. Vendors change prices without notice.
Is GMass expensive?
GMass starts at $29.95/mo. We list 218 lead generation tools in total. 55 have a free tier, and those with a public price typically start around $49 a month.
- 34 quote-based
- 55 free tier
- 171 public price
Worked out automatically from every lead generation listing, so it updates as the directory changes.
Pros and cons
Pros
- Unlimited emails on every plan
- Works inside Gmail
- Standard from $20/mo billed yearly
Cons
- No sequences on Standard
- API starts on Premium
- Gmail and Google Workspace only
Integrations
Gmail Google Sheets Zapier
What's new at GMass
See all 1 GMass update, taken from GMass's own announcements and our price checks.
Follow GMass
Get an email when GMass ships a new feature, posts release notes or changes its starting price. Only when something changes, and you can stop in one click.
How GMass compares
See all GMass alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | – | $29.95/mo | – | ✓ | |
| | – | $35/mo | ✓ | ✓ | Compare |
| | – | $55/mo | ✓ | ✓ | Compare |
| | – | $47/mo | ✓ | ✓ | Compare |
| | – | $29/mo | – | – | Compare |
$35/mo MCP API
Standalone cold email if you do not want to send from Gmail.
$47/mo MCP API
Cold email with many mailboxes and inbox rotation.
Your next step
Shortlisting GMass?
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