Is GMass Free? The Trial Cap, the 2026 Prices and the Per-Mailbox Maths
GMass has a free trial rather than a free plan: seven days, 50 messages a day, no external SMTP. Here is what the paid plans cost per mailbox after January 2026.
GMass is not free. It offers a seven-day trial limited to 50 messages per rolling 24 hours with third-party SMTP disabled, and the first 10,000 emails routed through an SMTP service on a paid plan. Individual plans run from $29.95 to $59.95 per month on monthly billing after the January 2026 increase, priced per user.
Key takeaways
- The free trial is seven days and 50 messages per rolling 24 hours, and GMass states that test sends and Spam Solver messages count against the same allowance.
- Third-party SMTP cannot be connected during the trial, so the configuration a cold-email team would actually run is the one the trial cannot test.
- After the January 2026 change, published monthly rates are $29.95 for Standard, $39.95 for Premium and $59.95 for Professional, with annual billing lower per month.
- Every plan is priced per user, and a user is a mailbox, so the sending architecture that keeps cold outbound safe is the one that multiplies the licence cost.
Reviewed and updated August 16, 2026
GMass installs from the Chrome Web Store without a card, which is where the "is it free" question comes from. The honest answer sits on GMass's own pages, and it has three parts: a trial that is free and short, a sending allowance that is free and metered, and a subscription that is neither.
Getting those three apart matters more for cold outbound than for a one-off announcement, because the thing that decides the bill is how many mailboxes you send from rather than how many emails you send.
What GMass gives away
GMass's pricing FAQ, fetched on 16 August 2026, states the trial terms directly. Free trials last seven days and are limited to sending 50 email messages per day. All other features work during the trial. After the trial expires, the page says, you need to subscribe to a paid plan to continue using GMass.
Two details in that FAQ change how the cap behaves in practice. The count runs on a rolling 24-hour basis rather than resetting at midnight, and the page is explicit that it includes test emails and any messages generated by the Spam Solver tool. Teams that spend the first day of a trial testing deliverability against their own inboxes can reach the ceiling without having contacted a single prospect.
The FAQ also names the one feature the cap disables. You cannot connect a third-party SMTP server on a free trial, and it gives the reason plainly: the 50-email limit makes it pointless. Since connecting an external sending route is the whole reason a serious sender evaluates GMass, the trial cannot test the configuration a cold-email team would actually run.
There is a second free allowance and it is easy to miss. On usage-based billing for SMTP, the vendor's January 2026 pricing post states that the first 10,000 emails sent through an SMTP service, whether your own account or GMass's in-house server, are free, and that beyond that the price is $5 per 10,000 emails sent through the SMTP service. That allowance sits on top of the subscription rather than replacing it.
- Yes: A seven-day trial with every feature enabled
- Depends: 50 email messages per rolling 24 hours during that trial
- No: Test sends and Spam Solver messages count against the same 50
- No: Third-party SMTP connection during the trial
- Yes: The first 10,000 emails routed through an SMTP service, on a paid plan
- No: Any continued use after day seven without a subscription
What the plans cost after January 2026
GMass's own pricing page renders its figures in the browser, so a plain fetch of it returns empty price elements and monthly labels with no numbers attached. The figures are published instead in a post by founder Ajay Goel dated 10 December 2025, announcing a price change effective 1 January 2026 and describing it as only the third increase in the product's ten-year history.
That post publishes the before and after for all three individual plans. Standard moved from $25 to $29.95 per month on monthly billing, with the annual rate moving from $18.75 per month, billed as $225, to $20.75 per month, billed as $249. Premium moved from $35 to $39.95 per month, with annual moving from $27.08 per month, billed as $325, to $29.08 per month, billed as $349. Professional moved from $55 to $59.95 per month, with annual moving from $43.75 per month, billed as $525, to $49.92 per month, billed as $599.
Team plans changed on the same date, and the post says their features are an exact match for the individual Professional plan, naming high-priority support and MultiSend for inbox rotation among them. The five-user monthly tier moved from $29 to $35 per user per month, billed as $175, with per-user overage published at $38. The ten-user monthly tier moved from $26.50 to $29.50 per user, billed as $295. The hundred-user monthly tier moved from $18 to $22 per user, billed as $2,200.
The per-user overage figures in that table are the ones to read twice, because they are how a team plan behaves when it grows between tiers rather than at one. The published overage on the five-user monthly tier is $38 per user per month, which is above the $35 per-user rate inside the tier itself, and the ten-user tier's published overage of $35 sits above its own $29.50 rate. Adding a mailbox mid-cycle therefore costs more per mailbox than buying the next tier outright, which makes the seat count a planning decision rather than something to adjust as you go.
One caution about that pricing FAQ page as a source. Its comment thread runs for years and is full of subscribers quoting what they pay, at figures like $6.95, $12.95 and $19.95. Those are readers describing legacy plans, not the vendor publishing a price, and anyone grepping that page for dollar signs will pull them out looking exactly like current rates. The post above is the surface that carries the vendor's own numbers.
- $29.95 per month on monthly billing
- $20.75 per month on annual, billed $249
- Previously $25 and $18.75
- $39.95 per month on monthly billing
- $29.08 per month on annual, billed $349
- Previously $35 and $27.08
- $59.95 per month on monthly billing
- $49.92 per month on annual, billed $599
- Previously $55 and $43.75
Per inbox is the number that matters
Every figure above is per user, and a user in GMass is a Gmail or Google Workspace account. That is the pricing dimension a cold-email team has to model, because the sending architecture that keeps volume safe is many mailboxes each sending modestly, not one mailbox sending hard.
Work an illustrative example, invented here purely to show the shape of the arithmetic rather than drawn from any campaign. A team decides it wants twelve sending mailboxes. Taking the published ten-user monthly team tier at $295 and adding two seats at the published $35 per-user overage gives $365 a month. Buying the same twelve mailboxes as individual Professional subscriptions at $59.95 each gives $719.40, close to double. Both of those totals are arithmetic performed here on GMass's published rates rather than quotations. The lesson generalises past the specific numbers: seat-priced tools reward consolidating users onto a team plan and punish the mailbox-spreading pattern that cold outbound depends on, and the tier boundaries decide more of the bill than the sending volume does.
Add the Google Workspace licence behind each of those mailboxes, since GMass sends through Gmail rather than replacing it, and the per-inbox cost is the licence plus the seat plus any SMTP overage past the first 10,000 messages. Modelling that properly is the same exercise as any other channel cost, and our guide to cost per lead in B2B walks the denominator side of it. Gmail's own ceilings, which are what MultiSend and the SMTP route exist to work around, are catalogued in our roundup of sending limits by provider.
Spending seven days and 50 sends a day well
The trial's shape rewards a plan. Fifty messages per rolling 24 hours across seven days is enough to answer real questions if you decide the questions first, and nowhere near enough to run a campaign, so treating it as a small campaign wastes it.
The questions worth spending it on are the ones a feature list cannot answer. Does the merge behave the way you need on your actual spreadsheet, including the conditional cases. Does reply detection surface responses where your team will see them. Does the unsubscribe handling match what your compliance position requires. Where do messages land when sent from the mailbox you plan to use, tested against a seed set rather than against your own inbox. Reserve the last two days for a send to a small live segment, because everything before that is testing the tool and only that tests the setup.
Where the feature list and our doctrine part company
GMass markets unlimited automatic follow-up stages and a send-as-replies option that threads a new campaign under a prior message. Both are ordinary practice across the cold-email tooling market, and describing them is not the same as recommending them.
Our documented position is one message per campaign. We do not send bumps and we do not send thread replies, on either email or LinkedIn. Re-touching an audience that did not reply is a new single-message campaign with a genuinely different angle, usually triggered by a new signal rather than by a timer. A tool that makes five-step sequences effortless makes it easy to spend your domain reputation proving that the second, third and fourth messages perform worse than the first, and the deliverability consequences are the part nobody measures until placement drops. Our cold email deliverability guide covers what that costs.
The inbox rotation capability is a different matter and it is genuinely useful. Spreading a day's volume across mailboxes is the correct architecture. The question to ask of any tool offering it is whether the rotation is priced per mailbox, because that is where the cost curve bends.
Choosing on shape rather than on price
GMass is a Gmail extension with an SMTP relay bolted on, and that shape decides who it suits. A founder or a small team sending from one or two mailboxes, wanting mail merge inside the interface they already live in, is well served and the entry price is low. A team running structured outbound across a dozen domains with separate warmup, suppression and reply routing is buying a different category of product, and the seat maths above is the first sign of it.
The wider category comparison sits in our guide to cold email software, and the direct swaps are in our GMass alternatives roundup.
The short answer
GMass is not free. It has a free seven-day trial capped at 50 messages per rolling 24 hours, with test sends counted in and third-party SMTP switched off, and a genuinely free first 10,000 SMTP-routed messages once you are paying. Beyond that, individual plans run from $29.95 to $59.95 per month on monthly billing after the January 2026 increase, priced per user, which for cold outbound means priced per mailbox.
If you would rather watch a campaign run on your own ideal customer profile before choosing a sending stack at all, start a free campaign and we will build the list, write the copy and run the infrastructure.
Pricing and features verified as of August 2026. Verify current terms with the vendor before relying on them.
Frequently asked questions.
Frequently asked questions- Does GMass have a free plan?
- No. It has a seven-day free trial rather than a permanent free tier. The trial allows 50 email messages per rolling 24-hour period, counts test sends and Spam Solver messages against that allowance, and disables the third-party SMTP connection. GMass states that after the trial expires you need a paid subscription to continue using it.
- How many emails can I send with free GMass?
- Fifty per rolling 24 hours during the seven-day trial, which is a moving window rather than a daily reset at midnight. That works out at a few hundred over the whole trial, and it includes anything you send to yourself while testing. It is enough to check merge behaviour and reply handling, and nowhere near enough to run a campaign.
- How much does GMass cost per month?
- On the prices published for 1 January 2026, Standard is $29.95, Premium is $39.95 and Professional is $59.95 per month on monthly billing. Annual billing is lower per month at $20.75, $29.08 and $49.92 respectively. Team plans are priced per user and start at $35 per user per month on the five-user monthly tier.
- Is GMass a good fit for cold email at volume?
- It depends on the mailbox count. GMass sends through Gmail and prices per user, so a founder sending from one or two mailboxes gets a cheap, familiar tool. A team spreading volume across a dozen mailboxes pays for each of them twice, once for the Google licence and once for the seat, and usually wants purpose-built sending infrastructure instead.
About the author.
Ben Carden is CRO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Previously at Gartner Enterprise. Studied at London School of Economics.
Ben Carden · CRO
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