GMass vs Mailmeteor
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Both sides assessedGMass compared with Mailmeteor
Both live inside Gmail and Google Sheets, but they are aimed at different people. Mailmeteor is cheaper, cleaner, privacy-first out of Paris, and starts at $5.99 a month with a genuinely usable free tier. GMass is denser, has the Gmail-search list builder, free verification, an API, and MultiSend rotation. Pick Mailmeteor for tidy low-volume merges and internal comms; pick GMass when the job is actual cold outbound across multiple mailboxes.
Mailmeteor compared with GMass
The two Gmail-native tools, split by philosophy. GMass is denser and more cold-email-native, with a Gmail-search list builder, free verification, an API, and free secondary accounts under MultiSend at $59.95. Mailmeteor is cheaper, cleaner, includes warm-up from $17.99, and is far easier to hand to a non-technical colleague. Choose GMass for power and multi-mailbox outbound; choose Mailmeteor for tidy, affordable, privacy-conscious merges.
Choose GMass if
Solo founders, consultants, recruiters, and small teams that already live in Gmail and want a cheap, deeply capable mail-merge and cold email tool that sends from their real mailboxes, at volumes of a few hundred to a few thousand emails a day across a handful of accounts.
Choose Mailmeteor if
Small businesses, schools, nonprofits, and lean teams that need personalized bulk email from their own Gmail account, want a free or single-digit-dollar option, and value a clean privacy-conscious tool over a maximalist outbound platform.
Side by side
13 attributes| Attribute | GMass | Mailmeteor |
|---|---|---|
| Category | Cold Email | Cold Email |
| Starting price | $29.95 per month (Standard), or $249 per year (free plan available) | $0 free, then $5.99 per user per month (Starter) (free plan available) |
| Pricing model | Per-user subscription with three individual tiers and banded team plans; unlimited contacts and unlimited campaigns on every paid tier, with volume capped by Google's own per-account sending limits rather than by GMass. | Per-user subscription with a real free tier; plans meter emails per day and per month rather than contacts or mailboxes, with feature gating on follow-ups, warm-up, tracking domains, and inbox rotation. |
| Free plan | A perpetually free level exists for low-volume sending, with a daily recipient limit and GMass branding appended to messages; verification, sequences, and reporting are limited until you upgrade. | Hobby: 500 emails a month and 50 a day, with templates, open and click tracking, scheduling, attachments, and Gmail, Sheets, and Excel integration. Outgoing mail carries Mailmeteor branding. |
| Free trial | Free tier usable immediately after install with no credit card, limited by a daily recipient cap and a GMass footer on outgoing mail | No separate trial; the Hobby free plan is the evaluation path and does not expire |
| Best for | Solo founders, consultants, recruiters, and small teams that already live in Gmail and want a cheap, deeply capable mail-merge and cold email tool that sends from their real mailboxes, at volumes of a few hundred to a few thousand emails a day across a handful of accounts. | Small businesses, schools, nonprofits, and lean teams that need personalized bulk email from their own Gmail account, want a free or single-digit-dollar option, and value a clean privacy-conscious tool over a maximalist outbound platform. |
| Setup time | Under ten minutes for a first campaign: install the Chrome extension, authorize Gmail, connect a Google Sheet, and send. Custom tracking domain setup adds a DNS record and maybe an hour of propagation. | Under fifteen minutes. Install the Workspace add-on, open a Google Sheet, map columns, preview a row, and send. Custom tracking domain setup on Premium adds one DNS record. |
| Learning curve | Very low to start because the campaign is a Gmail draft, but moderate to run well. The settings panel is dense, and the difference between a competent GMass user and a novice is mostly knowledge of pacing, tracking domains, and when not to send. | The lowest in this category. If someone can use Google Sheets they can run a Mailmeteor campaign, and the per-row preview means mistakes are visible before they are expensive. |
| Platforms | Chrome extension for Gmail, Web-based campaign reports and settings, Gmail mobile add-on for basic actions, REST API | Google Workspace add-on for Gmail and Google Sheets, Web app, Excel support, Chrome extension |
| Compliance | CAN-SPAM tooling including automatic unsubscribe links and opt-out suppression, GDPR-relevant processing terms; lawful basis for cold contact remains the sender's responsibility, Google OAuth restricted-scope verification for Gmail access | GDPR-aligned processing from an EU-headquartered vendor, CAN-SPAM tooling including unsubscribe links and opt-out suppression, Google Workspace Marketplace OAuth review for Gmail and Sheets scopes |
| Founded | 2015 | 2018 |
| Headquarters | United States | Paris, France |
| Ownership | Bootstrapped, founder-owned | Bootstrapped, founder-owned |
Strengths and limitations
GMass
Strengths
- Sending happens through real Google mailboxes with your own authentication, which is the deliverability model every serious cold email operator eventually returns to.
- Building a list from a Gmail search is a genuinely unique capability and repeatedly the reason people install GMass in the first place.
- Free unlimited email verification and free secondary sending accounts under MultiSend remove two line items competitors bill for.
- Flat per-user pricing with unlimited contacts and campaigns means budget certainty; nothing scales with list size.
Limitations
- No warm-up at all since 2023, so new domains need a separate tool and a separate bill before GMass is safe to run at volume.
- Gmail's per-account caps (about 500 recipients a day on consumer Gmail, about 2,000 on Workspace) are a hard ceiling GMass cannot raise.
- Gmail only. No Microsoft 365 support, no generic SMTP sending path for campaigns, and no plan to add them.
- Reply management is Gmail labels plus a companion triage tool rather than a true team inbox with statuses, owners, and deal stages.
Mailmeteor
Strengths
- The cheapest credible paid tier in the category at $5.99, and a free plan that is actually usable rather than a teaser.
- Warm-up and a custom tracking domain are bundled from $17.99, which is a lower price for those two things than most standalone warm-up tools charge on their own.
- Per-recipient preview before sending is the best guard against merge-field disasters that any tool here offers.
- Spreadsheet-native workflow means non-technical staff can run campaigns without learning a new application.
Limitations
- Volume ceilings are low: 60,000 a month per user on the top tier, which no high-volume outbound program can live inside.
- Inbox rotation only arrives at $35.99 Professional, and extra sending capacity generally means extra seats rather than free connected accounts.
- No unified team inbox; replies are handled in Gmail with labels, so there is no shared queue, no assignment, and no pipeline view.
- No lead database or email finder, so list building is entirely a separate purchase and a separate workflow.
Pricing compared
GMass
Per-user subscription with three individual tiers and banded team plans; unlimited contacts and unlimited campaigns on every paid tier, with volume capped by Google's own per-account sending limits rather than by GMass.
- Standard$29.95
- Premium$39.95
- Professional$59.95
- Team (5 users, Premium)$175
Modelled at 10,000 emails a month, GMass Professional at $59.95 covers it with three or four connected Workspace mailboxes and costs less than most platform starter tiers once you account for the free verification and free secondary accounts. At 100,000 emails a month the arithmetic breaks down, not because GMass charges more but because you would need roughly fifty Workspace mailboxes at Google's own prices and an extension-based workflow to manage them, at which point a rotation-native platform is simply the right tool. Judged inside its range, GMass is the best capability-per-dollar in the category; judged outside it, it is the wrong architecture.
Mailmeteor
Per-user subscription with a real free tier; plans meter emails per day and per month rather than contacts or mailboxes, with feature gating on follow-ups, warm-up, tracking domains, and inbox rotation.
- Hobby$0
- Starter$5.99
- Premium$17.99
- Professional$35.99
At 10,000 emails a month Mailmeteor is the cheapest serious option in the category: one Premium seat at $17.99 covers it with warm-up, a custom tracking domain, follow-ups, and an AI assistant included, against $30 to $80 for comparable platform tiers. At 100,000 a month the model stops working; you would need two Professional seats at $35.99 just to reach 120,000 across two users, and the per-mailbox daily caps mean you are managing seats rather than mailboxes. That is the honest boundary: superb value up to roughly 30,000 sends a month, structurally wrong above 60,000.
Editorial verdict on each
GMass
GMass is the best cold email tool for people who do not want a cold email platform. If you send from one to five real Gmail accounts, want free verification, want your replies in your normal inbox, and want a flat bill that never scales with list size, nothing else in this category is better value than $59.95 a month for Professional with MultiSend and free secondary accounts. The two things that should stop you are structural rather than fixable: Gmail's per-account daily cap sets a hard ceiling, and there has been no warm-up since 2023, so new domains need a separate purchase. Above roughly ten thousand sends a month, or on Microsoft 365, buy something else. Below that, GMass is a bootstrapped, profitable, decade-old product that quietly does more than tools costing three times as much.
Read the full GMass profileMailmeteor
Mailmeteor is the best cheap tool in this category and one of the few that is honest about its ceiling. For a small business sending up to about 30,000 personalized emails a month from one or two Gmail mailboxes, $17.99 a seat buying warm-up, a custom tracking domain, follow-ups, verification, and an AI writer is unbeatable value, and the spreadsheet-native workflow means anyone on your team can run it. The free tier is real, the privacy stance from a bootstrapped Paris company is credible, and the per-row preview prevents the mistake everyone else makes. Buy it if the spreadsheet is your source of truth and your volume is modest. Do not buy it if you plan to run ten mailboxes, need a shared reply inbox, or run on Microsoft 365; those are structural mismatches, not gaps that a higher tier fixes.
Read the full Mailmeteor profileGMass profile last reviewed 2026-08-22; Mailmeteor last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.