# GMass

> Mail merge and cold email campaigns sent from inside Gmail

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.

- **Category:** Cold Outreach
- **Made by:** GMass, Inc.
- **Website:** https://www.gmass.co
- **Runs on:** Web, Browser extension
- **Facts last checked:** Oct 17, 2026

## Pricing

GMass is a paid product with a free trial, starting at $20 per account / month, billed annually ($29.95 billed monthly).

- **Pricing model:** Free trial
- **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 | $20 per 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 | $29 per 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 | $49 per account / month, billed annually ($59.95 billed monthly) | Adds inbox rotation across several sending accounts (MultiSend) and high-priority support. $599 a year. |
| Team | $145 per 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 https://www.gmass.co/pricing on Oct 17, 2026. Prices change, so confirm with GMass before buying.

## Ways to pay less

- **Save up to 31% with annual billing** (Annual discount): 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%. Source: https://www.gmass.co/pricing
- **15% off for .edu Google Workspace accounts** (Education): GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing. Source: https://www.gmass.co/blog/pricing-faq/
- **15% off for .org Google Workspace accounts** (Nonprofit): The same 15% discount applies automatically to Google Workspace accounts on a .org domain; nonprofits on other domains do not get it. Source: https://www.gmass.co/blog/pricing-faq/

## 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.

## 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.

## ToolGPA grades

**GPA: 2.4 out of 4**, graded Oct 17, 2026. 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.

- **Value for money: B.** Five 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.
- **Free plan and trial: C.** No 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.
- **Features: C.** The 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.
- **Ease of use: B.** No 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.
- **Platforms and integrations: C.** It 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.

These are ToolGPA's own grades. 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.

## Where it 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.

The category's chart of price against score: https://toolgpa.com/charts/cold-outreach

## Keep it, 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.

- You could not: Newsletters sent to thousands of people that still reach the inbox.
- You could not: It plugs into other products, Gmail, Google Sheets and Zapier among them, and has an API.
- You could not: AI features, unless you pay a model provider for each request yourself.

A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it.

## Works with

Gmail, Google Sheets, Zapier

**Tags:** Email campaigns, AI features, Public API

## Alternatives

- [Mixmax](https://toolgpa.com/tools/mixmax): Email sequences, tracking and meeting booking inside Gmail. [Compare](https://toolgpa.com/compare/gmass-vs-mixmax)
- [Yesware](https://toolgpa.com/tools/yesware): Email tracking and outreach campaigns inside Gmail and Outlook. [Compare](https://toolgpa.com/compare/gmass-vs-yesware)
- [Mailshake](https://toolgpa.com/tools/mailshake): Per-user cold email sequences with a dialer on the top plan. [Compare](https://toolgpa.com/compare/gmass-vs-mailshake)
- [Saleshandy](https://toolgpa.com/tools/saleshandy): Cold email sequences with a B2B lead database in every plan. [Compare](https://toolgpa.com/compare/gmass-vs-saleshandy)
- [Instantly](https://toolgpa.com/tools/instantly): Cold email from unlimited inboxes, priced by emails and contacts. [Compare](https://toolgpa.com/compare/gmass-vs-instantly)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 17, 2026:

- https://www.gmass.co/pricing
- https://docs.google.com/spreadsheets/d/1UMs6HShKGZk2vowM6uLxN3VglWNQV_k8h0iS4iUi3SQ/edit?usp=sharing
- https://www.gmass.co/blog/pricing-faq/
- https://www.gmass.co/
- https://www.gmass.co/faq
- https://www.gmass.co/features/reporting
- https://www.gmass.co/features/auto-follow-up-gmail

Page: https://toolgpa.com/tools/gmass
Listed by ToolGPA (toolgpa.com).