A powerful mail merge and mass email system for Gmail™.
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Listing updated:September 4, 2023
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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
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GMass for Gmail™ will ask for the permissions shown below. Learn more
GMass for Gmail™ will need access to your Google account
This will allow GMass for Gmail™ to :
View your email messages when the add-on is running
Run as a Gmail add-on
Connect to an external service
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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PMO Saekyung Phase 3
April 3, 2025
GMass is incredibly user-friendly, especially for those who are familiar with Gmail. The interface feels like an extension of Gmail, making it easy to compose, schedule, and send bulk emails directly from your inbox. GMass offers useful features like email tracking (opens, clicks, replies), automatic follow-up emails, and scheduling. It also supports creating email campaigns with attachments and includes A/B testing to optimize email performance.
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Vishal Bhawsinghka
March 17, 2025
GMass is a really great tool for cold outreach. Very happy with it. The best part about the tool is that it acts very native to the GMail interface. So it looks and feels as if I have personally emailed the prospect from my address (and not like I emailed from a marketing tool). The from address is mine, their replies land in my inbox directly, and the mass email is indistinguishable from 1-on-1 emails. I think that's the top benefit of using GMass. Also, the entire tool sits within my inbox as silently as realistically possible, which is great. A small area for improvement is that there seems to be a lag between the reporting of some metrics on their main dashboard screen vs when you click the metrics (for eg. emails opened) which shows the actual updated numbers. Not a major issue for us, but it could be relevant for those who need real-time reporting. Overall, the tool seems to be created keeping in mind the needs of cold email outreach and hence does a great job.
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Matt Wilson
April 1, 2025
I loved GMass. I strongly suggest going for GMass as a tool for easy and smooth emailing and follow-ups. Really makes my task so easy that I can get my hours of work done in seconds. Gmass is definitely worth it in terms of convenience and time-saving benefits.
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Jinglan Wang
March 4, 2025
**GMass: A Game-Changer for Business Email Marketing!** We've been using **GMass** for our business email campaigns, and it has truly transformed our outreach! 🚀 ✅ **Easy to Use** – Seamlessly integrates with Gmail, making bulk emailing effortless. ✅ **High Deliverability** – Ensures our emails land in inboxes, not spam folders. ✅ **Powerful Automation** – Follow-ups, scheduling, and personalization make campaigns more effective. ✅ **Affordable & Scalable** – Perfect for small businesses and large enterprises alike. If you're looking for a **reliable, efficient, and cost-effective** email blaster, GMass is the way to go! Highly recommended! ⭐⭐⭐⭐⭐
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Houssam Bouchakour
April 9, 2025
One of the best tools for cold email outreach out there. It's incredibly user-friendly and offers a wide variety of features you couldn't find somewhere else at this price range. 100% recommended!
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Rohan John
February 27, 2025
Amazing tool! So easy and user-friendly. Easy to set up and follow up. Gmass is a reliable and powerful tool for anyone looking to enhance their email outreach with minimal effort.
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Washington School PTA WONJ
April 11, 2025
Gmass has been great for our PTA. I have easily been able to email all our members at once with way more professional emails than we have sent in the past. I am not a tech savvy person and have found this very easy to use.
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Parvathya Sripadhan
February 3, 2025
Simple and efficient. Loved this amazing email marketing tool. It's a great option for quick campaigns and follow-ups. They also give us sufficient analytics to understand the performance of our campaigns. Overall a great tool to have!
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Mike Adams
February 5, 2025
Gmass is always the best. Simple efficient and easy to use. Design the campaign in a quick way. Easy to setup and follow up. Gmass is a reliable and powerful tool for anyone looking to enhance their email outreach with minimal effort. I have been using it for my all emails and it is very efficient.
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Kristine Escueta
March 6, 2025
Hi! This is my first time trying this and I honestly think it's a great too and affordable one. The thing is, I am currently running a few campaigns that is to be sent on different emails and you are only allowed to use one email per subscription (my bad, didn't read that!). However, I really tried it and I might actually use it for my weekly newsletters soon, just on one account though. Overall, it's beginner friendly and it does maximize Gmail :)
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