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AWeber
Robly
Salesforce Email Studio
GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!

Intercom
Customer.io
MooSend
MailerLite
Sendy
EmailOctopus
TinyLetter
Send activities-based emails to your users to increase engagement and conversion rate.

Which is more popular?
Based on our record, GMass seems to be more popular. It has been mentioned 7 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | gmass.co | undersend.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | 2020 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of GMass yet.
With Undersend, you can create and send personalized marketing campaigns to your users based on their activities. You can trigger a message when a user does or doesn't do an action. Each email can be personalized by the user properties like first name, sign up date, or whatever you want....
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
GMass is recommended for individuals, small businesses, and startups who primarily use Gmail and are looking for a straightforward, cost-effective way to manage email campaigns. It is excellent for those who need to send personalized emails, automate follow-ups, and track basic metrics without extensive setup or learning curves.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
GMass Review and Tutorial: How To Send Thousands of Emails in Minutes
More videos
No Undersend videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using GMass and Undersend. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


GMass is a mail merge tool designed for mass email campaigns directly from your Gmail inbox. With advanced features like automated follow-ups, segmentation, and A/B testing, GMass enables users to manage and optimize...
Gmass is a powerful mail merge and follow-up email service for Gmail. Connect to Google Sheets to send personalized mass emails; send emails to selected recipients as new messages or replies; schedule emails, track...
GMass is an email marketing warm up software based around Google’s Gmail services.it’s an Open source email warmup, where you can enjoy all exciting and useful tools for free.GMass is an all-in-one Gmail solution,...
We have no reviews of Undersend yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


If you have Gmail or Gsuite, try GMass - gmass.co. Cheap, easy, and uses your email address, so not spam filtering. Source: over 3 years ago
I did some tests today at gmass.co using my [xxx@pm.me](mailto:xxx@pm.me) email address and any of the many @pm.me emails I use go directly to the Primary Inbox on the tests. Whenever I use one of my authorized domains, even sending it... Source: over 3 years ago
You can use gmass.co to achieve this with gmail You can use inboxpirates to check how it looks on different email clients. Source: about 4 years ago
Tracking Undersend since Mar 2021.
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Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.
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We make it easy to send emails triggered by user behavior. Build, measure and improve your emails to activate and retain users
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Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
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Moosend allows you to design and send your email marketing campaigns and track the results from an easy-to-use web interface as well as a direct SMTP server connection for your smtp client or web application.
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