Do I need Gmail to use GMass?

Yes, and Chrome specifically. GMass runs as a Chrome extension inside the Gmail interface, so it is not an option if your team is on Outlook or another provider. Every other sending tool in this catalog is provider-agnostic.

How many emails can I send with GMass?

GMass markets ways to send beyond Gmail's normal caps, including SMTP integration. But the underlying constraint is your Google account's sending limits rather than the GMass plan you buy — which is a different model from platforms that sell you volume directly, and worth understanding before you plan a campaign around it.

Is there a free version?

There is a free trial that requires no credit card and no signup form — you install the Chrome extension and start. We have not verified a permanently free tier with published limits, so we describe it as a trial rather than a free plan.

Does GMass include email warmup?

Not that we found documented on its pricing or product pages, so we do not list one. Treat that as a gap in our verification rather than proof of absence — but if bundled warmup matters to you, QuickMail and Mailshake both include it explicitly on every plan.

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GMass Review

Mail merge and cold email inside Gmail, as a Chrome extension.

4.2From $29.95/moFree trial

Pricing and features verified 2026-08-25 · monthly billing; $20/mo billed annually ($249/yr) · how we check

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GMass is not a standalone platform — it is a Chrome extension that turns the Gmail compose window into a campaign sender, with Google Sheets mail merge, automated follow-ups and reporting. That makes it the lightest-weight option here by a wide margin, and also the most tightly bound to one mail provider: no Gmail, no GMass.

Best for: solo senders and small teams who live in Gmail and want mail merge without a separate platform

Pros

✓Works inside Gmail, so there is no new interface to learn
✓Trial needs no credit card and no signup form — just install the extension
✓Clear annual discount: $20/mo billed yearly against $29.95 monthly

Cons

✕Requires Gmail or Google Workspace, and specifically Chrome
✕Sending capacity is governed by your Google account, not by the plan you buy
✕Team pricing is per user, so it scales worse than unlimited-mailbox platforms

Our verdict

GMass is the only tool here that is not really a platform. It is a Chrome extension that turns the Gmail compose window into a campaign sender, and that single design decision explains both its appeal and its ceiling. There is no new interface to learn, no mailbox connection flow, and the trial needs neither a card nor a signup form — you install it and you are sending. But your sending capacity is a property of your Google account rather than of the plan you buy, and team pricing is per seat, so it scales on a fundamentally different curve from the unlimited-mailbox platforms.

How the pricing actually works

The clearest pricing of any tool in this catalog, and unusually for us we can state both bases with confidence: $29.95/mo on monthly billing for Standard, or $20/mo billed annually at $249/yr — a real, quotable 33% saving. Premium is $39.95 / $29, Professional $59.95 / $49. Team plans run from 5 to 100 users and are priced per seat, which is where the comparison against Smartlead or Saleshandy turns sharply: those charge one flat fee regardless of how many mailboxes you connect.

Who it’s for

→Solo senders and small teams already living in Gmail who want mail merge without a platform
→Anyone who wants to test properly before paying — no card, no signup form, just the extension
→Buyers happy to commit annually, where the discount is a genuine third off

Who should look elsewhere

→Anyone not on Gmail or Google Workspace — it is a hard requirement, as is Chrome
→High-volume outbound, where capacity depends on your Google account rather than your plan
→Growing teams: per-seat pricing compounds where unlimited-mailbox platforms do not

Key features

Runs inside: Gmail / Google Workspace
Delivery: Chrome extension
Individual plans: $29.95 / $39.95 / $59.95 monthly
Annual discount: $20/mo billed yearly (Standard)
Team plans: 5 → 100 users, priced per seat

GMass FAQs

Do I need Gmail to use GMass?: Yes, and Chrome specifically. GMass runs as a Chrome extension inside the Gmail interface, so it is not an option if your team is on Outlook or another provider. Every other sending tool in this catalog is provider-agnostic.
How many emails can I send with GMass?: GMass markets ways to send beyond Gmail's normal caps, including SMTP integration. But the underlying constraint is your Google account's sending limits rather than the GMass plan you buy — which is a different model from platforms that sell you volume directly, and worth understanding before you plan a campaign around it.
Is there a free version?: There is a free trial that requires no credit card and no signup form — you install the Chrome extension and start. We have not verified a permanently free tier with published limits, so we describe it as a trial rather than a free plan.
Does GMass include email warmup?: Not that we found documented on its pricing or product pages, so we do not list one. Treat that as a gap in our verification rather than proof of absence — but if bundled warmup matters to you, QuickMail and Mailshake both include it explicitly on every plan.

Ready to try GMass?

Start with a free trial.