YAMM (Yet Another Mail Merge) vs GMass
Pricing last verified from each vendor's own site.
Verdict
Both send personalized mail merges from Gmail. YAMM Pro costs $72/yr for @gmail.com accounts or $144/yr for Google Workspace. GMass is built for cold email inside Gmail, at $29.95 to $59.95/mo billed monthly or $249 to $599 a year, with team plans from $175/mo.
- Consider YAMM (Yet Another Mail Merge) if: You want a low-cost mail merge with tracking.
- Consider GMass if: You want a Gmail tool built for cold email, with team plans.
Factual summary
- Both are listed under Cold Email.
- Lowest listed monthly price: YAMM (Yet Another Mail Merge) $6, GMass $29.95 (plans and billing terms differ; check each vendor page).
This is a factual comparison drawn from vendor sites, not a recommendation. Which fits depends on your channels, volume and budget.
| YAMM (Yet Another Mail Merge) | GMass | |
|---|---|---|
| Summary | Mail merge add-on for Gmail and Google Sheets with open, click and response tracking. | Mass email and mail merge for Gmail. |
| Starting price | From $6/mo | From $29.95/mo |
| Pricing details | Free plan; Pro for @gmail.com accounts $6/mo ($72 billed annually); Pro for Google Workspace accounts $12/mo ($144 billed annually); prices vary by billing country and exclude taxes | Billed monthly: Standard $29.95/mo, Premium $39.95/mo, Enterprise $59.95/mo; paid annually: $249/yr, $349/yr and $599/yr (shown as $20, $29 and $49 per month); team plans from $175/mo |
| Model | freemium | subscription |
| Free trial | — | — |
| Free plan | Yes | — |
| Channels | ||
| Last verified | 2026-11-01 | 2026-11-01 |
FAQ
What is the difference between YAMM (Yet Another Mail Merge) and GMass?
Both send personalized mail merges from Gmail. YAMM Pro costs $72/yr for @gmail.com accounts or $144/yr for Google Workspace. GMass is built for cold email inside Gmail, at $29.95 to $59.95/mo billed monthly or $249 to $599 a year, with team plans from $175/mo.
Which is cheaper, YAMM (Yet Another Mail Merge) or GMass?
YAMM (Yet Another Mail Merge) has the lower listed entry price ($6 vs $29.95 per month), but plan limits and billing terms differ.
When should I choose YAMM (Yet Another Mail Merge) over GMass?
Consider YAMM (Yet Another Mail Merge) if: You want a low-cost mail merge with tracking. Consider GMass if: You want a Gmail tool built for cold email, with team plans.
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