GMass for Gmail™ - Google Workspace Marketplace

A powerful mail merge and mass email system for Gmail™.

By:

Listing updated:September 4, 2023

Works with:

1M+

Overview

A powerful mass email and mail merge system for Gmail™.

Simple and powerful email marketing inside Gmail™.

*Send email marketing campaigns to thousands of email addresses.

*Mail merge with data from Google Sheets™.

*Personalize mass emails based on name, email address, and any available columns in Google Sheets™.

*Schedule mass emails to be sent later.

*Track opens and clicks.

*Send follow-up emails to people that opened, clicked, or replied to a previous campaign, or to those that did NOT open, click, or reply.

*See all reports right in your Gmail account, under the "GMass Reports" Label.

*Create instant recipient lists based on search results.

*Send unlimited emails from your Gmail™ account by connecting your GMass account to an external SMTP service like Sendgrid.

*And the killer feature - emails can be sent as replies to the last conversation you had with each recipient.

Note that the GMass Add-on must be paired with the GMass Chrome extension for full functionality. The Add-on allows you to see statistics on sent emails and add people to your "Unsubscribes" list, but the Chrome extension is needed to launch email campaigns: https://chrome.google.com/webstore/detail/gmass-powerful-mail-merge/ehomdgjhgmbidokdgicgmdiedadncbgf

We're always improving GMass. Stay updated with GMass on the web and social media.

Website: http://www.gmass.co
Blog: http://www.gmass.co/blog
Twitter: http://twitter.com/GMassForGmail

The website at www.gmass.co has screenshots and explanations of all features. You won't find a better mass email and mail merge tool for Gmail™ than GMass!

Any questions? Email our support team at support@gmass.zendesk.com or search our blog for answers!

Additional information

PricingFree of charge with paid features

Developer

Support

ReportFlag as inappropriate

Reviews

Language:

Sort by:

Google doesn't verify reviews or ratings. Learn more about reviews

Kushik Manek

July 18, 2026

⭐⭐⭐⭐⭐ GMass has made email outreach incredibly easy and efficient. The integration with Gmail is seamless, and the features like personalized mail merge, automated follow-ups, scheduling, and email tracking work flawlessly. It's intuitive to use, saves a significant amount of time, and has helped improve the effectiveness of my email campaigns. The support team is also responsive and helpful whenever assistance is needed. I highly recommend GMass to anyone looking for a powerful yet user-friendly email marketing solution.

Is this review helpful?

Yes

Kelly McCready

June 5, 2026

I have used this for crowdfunding campaigns twice now, and I absolutely love it. I find it intuitive. It makes me 100 times more effective than if I were to send things out on my own. It also minimizes errors because you don't make typos when you're sending a ton of emails with templates. Do it!

Is this review helpful?

Yes

IJEBSSR Journal

June 28, 2026

GMass has completely transformed the way we manage our email campaigns. It is easy to use, reliable, and packed with powerful features such as mail merge, scheduling, and email tracking. As an academic journal, we regularly communicate with authors, reviewers, and researchers, and GMass has made this process much more efficient. It saves us valuable time while ensuring our emails are delivered professionally. The Gmail integration is seamless, and the overall experience has been excellent. We highly recommend GMass to anyone looking for a dependable and effective email marketing solution.

Is this review helpful?

Yes

Mazhar Imam

June 21, 2026

I started using GMass while navigating a job change across the APAC and UAE markets. The volume of outreach required was immense, and GMass made it completely manageable directly within Gmail. I was able to send personalized emails at scale, track my engagement, and manage follow-ups efficiently. The automation features are fantastic—they directly contributed to me getting more interview calls. If you're looking to streamline your communication, this is a must-have.

Is this review helpful?

Yes

Caribbean Canadian Investment Summit and Trade

June 5, 2026

GMass delivered exactly what I needed for a large-scale professional outreach campaign. Once the Google Sheet was properly connected and the merge tags were set up correctly, every email went out personalised and on schedule, no issues at all. The support team deserves a specific mention: they responded quickly and resolved my setup questions efficiently. For anyone running a serious email campaign from Gmail, GMass is the right tool. The bulk sending, tracking, and follow-up automation are all excellent. Rating: 5 stars

Is this review helpful?

Yes

Prinkal Gangrade

June 29, 2026

GMass has been really helpful during my job search. I especially liked the mail merge feature because it made it easy to send personalized emails to multiple people at once without making them feel generic. It saved me a lot of time and made outreach much easier. Definitely a useful tool for anyone doing job search or networking.

Is this review helpful?

Yes

Michael Terry, CFA

May 31, 2026

I needed to send an important update to 545 HOA members from my regular Gmail account, and GMass made it completely seamless. I simply connected my Google Sheet with all the emails, pasted my message (with personalization tags), set a safe daily limit of 450, and added a 10-second pause — GMass handled everything automatically. It sent the first batch perfectly and scheduled the rest for the next day without any manual work or errors. The real standout is the data analytics. After the campaign, I had a beautiful dashboard showing exact open rates, click-throughs, bounces, and replies — all organized right inside Gmail. It gave me clear insights into who engaged with the audit summary, which was incredibly helpful for follow-up. If you’re sending any kind of group or community email blast and want it to feel effortless while still getting pro-level tracking, GMass is hands-down the best tool. Saved me hours and worked flawlessly. Highly recommend!

Is this review helpful?

Yes

Ayush Jindal

July 12, 2026

I find Gmass to be of great use. It's features like spam solver and multisend are really a game changer. The range of customisations it provide genuinely makes it way more useful than any other provider out there. It has saved me a good amount of time, and money.

Is this review helpful?

Yes

Arav Ahuja

June 4, 2026

Hey guys, I absolutely recommend this if your organization plans to promote an event, start a cold email campaign or generally wants to mass update it's customers. The process is smooth, easy to understand - The UI could use slight improvements but that is not a comment on the easy usability of this extension. It has several inbuilt features that actually gives you a peace of mind during mass email campaigns - the best one is the daily updates of the open rates/download rates and so on. ABSOLUTELY RECOMMENDED

Is this review helpful?

Yes

Nidhi Devle

May 12, 2026

One thing GMass does really well is keeping the workflow simple. Scheduling campaigns, adding follow-ups, and tracking replies all feel smooth. I didn’t need technical knowledge to get started. My feedback would mostly be about the support guides they sometimes make basic features sound overly advanced. More screenshots and quick examples would make the learning experience much better.

Is this review helpful?

Yes

1-10 of 1661

Clear search

Close search

Google apps

Main menu