GMass transforms Gmail into a powerful email marketing and cold email platform.
It enables mass email sending, advanced personalization via Google Sheets, and automated follow-up sequences.
The tool offers robust analytics, list building from existing Gmail contacts, and behavior-based campaign segmentation.

Pros

Integrates directly into Gmail's compose window for ease of use.
Bypasses Gmail's native sending limits for mass email campaigns.
Offers advanced mail merge personalization using Google Sheets, including fallback values.
Automates follow-up sequences until a recipient replies, enhancing response rates.
Provides detailed email reporting and analytics accessible from desktop and mobile Gmail apps.

Cons

Requires the Google Chrome browser to function.
Relies on Gmail's infrastructure, which might not be suitable for all enterprise-level email marketing needs.
The email list builder is limited to contacts found within the user's Gmail account.

What is GMass?

GMass is an email marketing and mail merge tool that works directly inside Gmail. It lets you send mass emails, automated follow-ups, and track results without leaving your Gmail inbox.

Available on: Chrome

Data compiled by Toolradar How we evaluate

Source gmass.co

Ratings Across the Web

4.8 (2,756 reviews)

GMass holds an aggregate rating of 4.8 out of 5 from 2,756 reviews across G2 and Capterra, last checked September 17, 2026.

G2 1,333 reviews

4.7/5

Capterra 1,423 reviews

4.8/5

Ratings aggregated from independent review platforms. Learn more

Preview

Key Features

Gmail integration
Mail merge
Auto follow-ups
Campaign analytics
Scheduling
A/B testing

Pricing Plans

GMass plans and prices
Plan	Price	Details
Free	$0	50 emails/day Basic features GMass footer
Standard	$25/monthly	Unlimited emails No footer Follow-ups
Premium	$35/monthly	A/B testing API High priority

Calculate your cost View full pricing

Is GMass worth the price?

Good value

GMass offers a generous free tier, making it accessible for light users.

The Standard tier at $25/month is reasonable for unlimited emails and follow-ups, while the Premium tier at $35/month for A/B testing and API access is also fairly priced. This pricing structure is best for individuals and small businesses looking for robust email marketing directly within Gmail.

Full GMass pricing: every plan, hidden costs and alternatives

How GMass's pricing compares

At $25/mo, billed monthly, GMass is mid-range of its 3 comparable direct competitors ($9 to $37.60/mo across the set).

Brevo

Woodpecker

$24

GMass

$25

Instantly

$37.60

Not ranked, different unit or currency: Mailerlite $12/mo flat, whole organisation, billed monthly; Lemlist $55/mo, billed yearly; Smartlead $39/mo flat, whole organisation, billed monthly.

Entry paid plan, monthly price, billed monthly.

GMass by the numbers

GMass compared with 110 Email Marketing tools on Toolradar, as of Nov 2026
Metric	GMass	Peer median	Position (1 is best)
Free plan	Yes	57% have one	n/a
Listed as an alternative to	7 tools	2	#26 of 110 (joint)
Integrations listed	2	3	#18 of 31 (joint) tools with at least one integration recorded
User rating	4.8/5 (across the web, 2,756 ratings)	4.5/5	#2 of 70 (joint) tools with 20+ reviews

Listed as an alternative to: #26 on 2026-10-16 to #26 on 2026-11-02 (rank among 110 tools, 1 is best).

Each position is counted among the tools that have data for that row, as noted under it. All Email Marketing data · How we compute this. Advertising and placement fees are not inputs to any position.

Cite this: Toolradar, “GMass by the numbers”, Nov 2026.

Reviews

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4.8/5

Across 2,756 verified user reviews on Capterra, G2

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Best GMass Alternatives

Top alternatives based on features, pricing, and user needs.

View full list →

Brevo Freemium

All-in-one marketing platform for email, SMS, and customer engagement

4.6

Instantly Paid

Scale cold email outreach with warm domains and performance analytics

4.8

SendPulse Free

Multi-channel marketing automation platform for email, chatbots, CRM, and online courses.

4.6

Mailerlite Freemium

Simple, affordable email marketing for growing businesses

4.7

Lemlist Paid

Multichannel sales outreach with AI personalization and lead data

4.6

Smartlead Paid

Scale cold email outreach with high-volume deliverability

4.5

Woodpecker Paid

Automate cold email outreach and personalize at scale

4.0

See all marketing automation tools →

Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

All GMass alternatives 7+ tools ranked, pricing + verdict per pick GMass vs Brevo Head-to-head: features, pricing, who wins GMass vs Instantly Head-to-head: features, pricing, who wins GMass vs SendPulse Head-to-head: features, pricing, who wins

Explore More

GMass FAQ

How does GMass enable sending mass emails beyond Gmail's standard limits?

GMass utilizes its proprietary distribution technology to bypass Gmail's inherent sending restrictions. This allows users to send a virtually unlimited number of emails for their campaigns directly from their Gmail account.

Can GMass personalize emails using data from Google Sheets, and does it support dynamic updates?

Yes, GMass integrates directly with Google Sheets for mail merge personalization, allowing users to leverage any column for custom fields. It can also monitor the Google Sheet for new rows and automatically send emails based on those additions.

What kind of reporting and analytics does GMass provide for email campaigns?

GMass offers campaign-level reports that detail key metrics such as opens, clicks, replies, and bounces. These analytics are accessible directly within Gmail, both on desktop and through the Gmail mobile app.

How does GMass assist in building email lists from existing Gmail contacts?

GMass allows users to build email lists by searching their Gmail account for messages containing target recipients. After a search, a 'Build Email List' button populates a Compose window with the extracted email addresses.

Does GMass offer functionality for automated follow-up sequences in cold email campaigns?

Yes, GMass enables users to set up automatic follow-up emails that send in a sequence. These follow-ups continue until the recipient replies, which helps to significantly boost response rates for cold email campaigns.

Can GMass create behavior-based campaigns based on previous email interactions?

GMass supports behavior-based campaigns, allowing users to segment and send emails to specific groups from prior campaigns. For example, you can target recipients who opened a previous campaign or those who did not click a specific link.

Source: gmass.co

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