GMass
Mail merge and cold email campaigns sent from inside Gmail
GMass report card
Fair · out of 4.0 · graded Oct 17, 2026
Best for cold email without leaving Gmail
GMass turns Gmail into a cold email tool: write the campaign in the normal compose window, point it at a Google Sheet and it sends from your own account, following up until people reply. It's about the easiest start in this category. It's Gmail and Chrome only, though, and follow-ups need Premium.
Who GMass is for
- Great if you want to send campaigns without leaving Gmail
- Handy when your list lives in a Google Sheet that keeps changing
- Good for solo senders who want follow-ups but not another app
Who GMass is not for
- Not for you if you use Outlook or another mail service, as it's Gmail only
- Skip it if you want LinkedIn steps, which GMass doesn't do
- Tight if you're on Standard, which has no automatic follow-ups
Why GMass gets a 2.4
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for moneyFive people on the Team plan pay $145 a month billed annually for every feature, $29 a head, or $175 billed monthly. That's inside the cheaper quarter's $32.50. A solo sender who wants follow-ups needs Premium at $29 an account billed annually.
- CFree plan and trialNo free plan. The 7-day trial needs no card but is capped at 50 emails a day, enough to check it works in your Gmail.
- CFeaturesThe email job done fully from Gmail: unlimited emails and contacts, mail merge from Sheets, follow-ups that stop on a reply, A/B tests, inbox rotation and SMTP for big sends. It's a smaller job, though: no LinkedIn steps, and Standard has no follow-ups.
- BEase of useNo App Store rating on record, but it lives inside the Gmail you already use: write an email, pick a list or a Sheet and press the GMass button. Very little to learn.
- CPlatforms and integrationsIt needs Gmail or Google Workspace and the Chrome browser, so it's a computer-only tool. Google Sheets and Zapier connect, and there's an API from Premium.
What these grades rest on. Graded from this listing, whose facts were read from GMass's own pages on 17 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/gmass#review"><img src="https://toolgpa.com/badge/gmass.svg" alt="GMass: 2.4 GPA on ToolGPA" width="196" height="56"></a>Where GMass stands among cold outreach tools
GMass's GPA of 2.4 is higher than 11 of the 20 other cold outreach tools we grade, and level with 1.
It stands best on ease of use (B, above 17 of 20) and worst on features (C, above 0).
Its paid plans start at $20 a month, against a middle price of $38.80 for the category: 1 of the 17 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 21 cold outreach tools we grade, cut by the letter each got. GMass’s own letter is outlined.
- BValue for moneyAbove 11 of 20, level with 3
- CFree plan and trialAbove 5 of 20, level with 15
- CFeaturesAbove 0 of 20, level with 8
- BEase of useAbove 17 of 20, level with 3
- CPlatforms and integrationsAbove 0 of 20, level with 2
Price against what you get
Each dot is one of 18 cold outreach tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep GMass, or make your own?
Keep it
To replace GMass you would be making newsletters sent to thousands of people that still reach the inbox. That is not a weekend's work, with an AI app builder or without one.
It costs $240 a year.
What you could not
- Newsletters sent to thousands of people that still reach the inbox.
- It plugs into other products, Gmail, Google Sheets and Zapier among them, and has an API.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. GMass’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is GMass?
GMass is a Chrome extension that adds mass email to Gmail: campaigns are written in Gmail's compose window, personalized from a list or Google Sheet, and sent from your own account with automatic follow-ups that stop on a reply. Larger sends can rotate across several inboxes or go out through an SMTP server, and a web dashboard holds campaign reports and settings.
GMass is a paid product with a free trial, starting at $20 per account / month, billed annually ($29.95 billed monthly). See every plan
Good for
- People who want to send cold email without leaving Gmail
- Mail merges from a Google Sheet, including recurring sends
- Solo senders who need follow-ups but not a separate outreach app
Worth knowing
- Needs a Gmail or Google Workspace account and the Chrome browser; campaigns are written and sent from inside Gmail.
- Each subscription covers one Gmail account, and the Standard plan has no automatic follow-ups.
- Inbox rotation needs Professional or a Team plan; sending through GMass's own SMTP service costs $5 per 10,000 messages.
- Gmail's own daily sending limits still apply to anything sent through the Gmail account itself.
Key features
- Campaigns from the Gmail compose window
- Write a campaign as an ordinary Gmail message, address it to a list, label or Google Sheet, and send it with the GMass button from your own account.
- Automatic follow-ups
- Unlimited follow-up stages that stop when a contact replies, clicks or opens, sent in the same thread or as new ones. Needs Premium or above.
- Google Sheets campaigns
- Merge fields come from a Google Sheet, GMass picks up edits made before a scheduled send, and new rows can be emailed automatically.
- Inbox rotation and SMTP
- MultiSend spreads one campaign across several mailboxes on Professional and Team, and an SMTP server can carry sends larger than Gmail allows.
- Reports in Gmail, the dashboard and the web
- Opens, clicks, replies, bounces and blocks arrive as Gmail reports, in the dashboard and as shareable web reports, with an AI Deep Analysis of the results.
- AI writing and SpinMax
- AI can draft a full campaign with its follow-ups, and SpinMax varies the wording of every email in a campaign automatically.
GMass pricing
- Starts at
- $20 per account / month, billed annually ($29.95 billed monthly)
- Free plan
- None
- Free trial
- 7-day free trial limited to 50 emails per 24 hours, no credit card required
| Plan | Price | What you get |
|---|---|---|
| Standard | $20per account / month, billed annually ($29.95 billed monthly) | Unlimited emails, contacts and campaigns, mail merge, email verification and Spam Solver. No automatic follow-ups. $249 a year. |
| Premium | $29per account / month, billed annually ($39.95 billed monthly) | Adds sequences and automatic follow-ups, A/B testing, triggered emails, and the API and Zapier. $349 a year. |
| Professional | $49per account / month, billed annually ($59.95 billed monthly) | Adds inbox rotation across several sending accounts (MultiSend) and high-priority support. $599 a year. |
| Team | $145per month for up to 5 users, billed annually ($175 billed monthly) | Every feature, including inbox rotation, for 5 Gmail accounts. Packs of 10, 25, 50 and 100 users cost less per user. |
Read from gmass.co on Oct 17, 2026. Prices change, so confirm with GMass before you buy.
Ways to pay less
- Annual discountSave up to 31% with annual billing
Standard costs $249 a year against $29.95 a month billed monthly, a saving of about 31%; Premium saves about 27% and Professional about 17%.
Stated on gmass.co - Education15% off for .edu Google Workspace accounts
GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing.
Stated on gmass.co - Nonprofit15% off for .org Google Workspace accounts
The same 15% discount applies automatically to Google Workspace accounts on a .org domain; nonprofits on other domains do not get it.
Stated on gmass.co
Works with
GMass alternatives
- GMass vs Mixmax
Free plan · from $29/mo
- GMass vs Yesware
Free plan · from $15/mo
- GMass vs Mailshake
From $25/mo
- GMass vs Saleshandy
Free trial · from $34/mo
- GMass vs Instantly
Free trial · from $37.6/mo
Common questions
Is GMass free?
No, GMass is a paid product, but you can try it first. 7-day free trial limited to 50 emails per 24 hours, no credit card required.
How much does GMass cost?
GMass lists 4 plans. Standard: $20 per account / month, billed annually ($29.95 billed monthly). Premium: $29 per account / month, billed annually ($39.95 billed monthly). Professional: $49 per account / month, billed annually ($59.95 billed monthly). Team: $145 per month for up to 5 users, billed annually ($175 billed monthly). Prices were read from gmass.co on Oct 17, 2026.
What platforms does GMass work on?
GMass is available on Web. It also has a browser extension.
Does GMass offer any discounts?
GMass publicly lists the following: Save up to 31% with annual billing; 15% off for .edu Google Workspace accounts; 15% off for .org Google Workspace accounts.
Does GMass have an Android app?
No Android app was listed when its pages were read on Oct 17, 2026. GMass is listed for Web.
Does GMass have an iPhone app?
No iPhone app was listed when its pages were read on Oct 17, 2026. GMass is listed for Web.
Is GMass open source?
GMass is not described as open source on its own site, as read on Oct 17, 2026.
Does GMass have an API?
Yes. GMass offers a public API, according to its own site.
What does GMass integrate with?
GMass's listing names Gmail, Google Sheets and Zapier. A listing names up to eight integrations, so it may connect to more.
Does GMass have a student discount?
15% off for .edu Google Workspace accounts. GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing.
Who makes GMass?
GMass is made by GMass, Inc.
What are the alternatives to GMass?
The closest alternatives to GMass in our directory are Mixmax, Yesware, Mailshake, Saleshandy and Instantly. Each one has a side-by-side comparison with GMass.
How does GMass compare with other cold outreach tools?
GMass's GPA of 2.4 is higher than 11 of the 20 other cold outreach tools we grade, and level with 1. It stands best on ease of use (B, above 17 of 20) and worst on features (C, above 0).
Is GMass good value for money?
ToolGPA grades GMass B for value for money. Its paid plans start at $20 a month, against a middle price of $38.80 for the category: 1 of the 17 others that charge start lower. On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Could I make my own version of GMass?
To replace GMass you would be making newsletters sent to thousands of people that still reach the inbox. That is not a weekend's work, with an AI app builder or without one. It costs $240 a year. What you could not make: Newsletters sent to thousands of people that still reach the inbox. It plugs into other products, Gmail, Google Sheets and Zapier among them, and has an API. AI features, unless you pay a model provider for each request yourself. This is a judgement from its listing. We have not built one.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 17, 2026.