GMass vs Mailsuite

Gmail

Mailchimp

Brevo

Gmail is a free, advertising-supported email service offered as part of Google Workspace (formerly G Suite), with 15GB of storage, color-coded inbox filters, and 'unsend' button

Mailchimp is an email and SMS marketing platform that combines artificial intelligence with marketing automation capabilities. The platform features a drag-and-drop builder, content creation tools, and audience management functions to help businesses design and distribute marketing campaigns across multiple channels.

Brevo is a CRM and email marketing solution that helps businesses run multi-channel marketing campaigns across email, WhatsApp, SMS, web push, and Facebook ads. Teams can trigger transactional emails, SMS, and WhatsApp notifications over Brevo SMTP and APIs.

There is no immediately available customer support or a number you can call when things go wrong or you're having tech issues.

Project Manager

I was able to get up and running without any help, and the one question I had, I was able to get support for very quickly.

GMass is a Google Chrome extension, which helps businesses run mass email campaigns from Gmail, manage responses, create recipient lists, and more. Supervisors can gain visibility into sent, opened, clicked, replied, unsubscribed, bounced, and rejected email metrics through reports.

A/B Testing

Activity Dashboard

Activity Tracking

Alerts/Notifications

Audience Targeting

Autoresponders

Behavioral Targeting

Behavior Tracking

Campaign Analytics

Campaign Management

Campaign Scheduling

Campaign Segmentation

Click Tracking

Content Analytics

Contextual Targeting

Customer Segmentation

Customizable Fields

Data Import/Export

Drip Campaigns

Dynamic Content

Email Campaign Management

Email Distribution

Email Management

Email Marketing

Email Templates

Email Tracking

Engagement Tracking

Event Triggered Actions

Experience Management

HTML Editor

Image Library

List Management

Mailing List Management

Mobile Optimization

Personalization

Preview Functionality

Real-Time Analytics

Real-Time Notifications

Real-Time Reporting

Reporting/Analytics

Scheduling

Subscription Management

Team Management

Template Management

Third-Party Integrations

Visual Analytics

By industry, GMass reviewers are most commonly professionals in marketing and advertising (15%). The most frequent use case for GMass cited by reviewers is email marketing (69% of reviewers).

Users and use cases

Most reviewers indicate that GMass delivers strong value for money, with affordable pricing, flexible plans, and a useful free tier. However, some users report that paid plans can feel pricey and the free version’s limitations are frustrating.

Value for money

The GMass integrations most frequently cited by reviewers are: Gmail (an email management product rated 4.9 out of 5 for its integration with GMass) and Google Sheets (a spreadsheet product, 5.0).

Integrations

GMass is a personalization solution with key features that include email distribution, email marketing, email campaign management, campaign scheduling, reporting and analytics, customizable fields, and more.

GMass

Web-based

Constant Contact

Mailshake

Mailsuite

Flodesk

MailerLite

Standard

Premium

Professional

Team - Professional

Challenges with deliverability

Customer support is below par and slow to respond to complaints. And most of my email campaigns got flagged as spam in my contact's inbox despite using the in-built spam checker

60% of reviewers feel negative about GMass’s spam prevention. Some users report frequent issues with emails landing in recipients’ spam folders, especially during bulk campaigns. Reviewers indicate that uncertainty about why emails are flagged as spam makes troubleshooting difficult. Users say the built-in spam checker and email verifier do not consistently prevent deliverability problems, and some find that notifications and responses are misdirected. Some reviewers feel that maintaining a good email reputation is challenging, and inadequate feedback about spam triggers adds to their frustration.

Efficient workflow and productivity

Owner

I am able to send out 100+emails simply and in minutes and this saves me both time and stress!

Marketing Specialist 

Gmass has saved me so much time copy and pasting the same message over and over.

97% of reviewers feel positive about GMass’s time saving capabilities. Reviewers appreciate that GMass streamlines outreach and organizes replies, enabling them to handle large volumes of emails quickly. Some users report that the tool reduces repetitive tasks, such as copying and pasting messages, and allows them to focus on more important business activities. Users indicate that features like Google Sheets connectivity further enhance efficiency. Some reviewers find that GMass saves hours each week, making their workflow smoother and freeing up time for deal-making and lead follow-up.

Intuitive and accessible experience

Independent Sales Professional

I was use Google Streak and GMass is a bit more easier to use in my opinion.

96% of reviewers feel positive about GMass’s ease of use. Users think the software is straightforward and integrates seamlessly with Gmail, making it convenient for daily operations. Some reviewers find the interface intuitive, allowing them to quickly learn and use the tool without extensive training. Reviewers indicate that GMass simplifies complex tasks, such as adding SMTPs or managing bulk outreach, and enables even less tech-savvy users to be productive. Users say the tool’s user-friendly design helps them work more efficiently and reduces the learning curve.

Model and Creative Director

I was able to send over 300 emails and landed an agent along with 250 emails for a campaign pitch and allowed me to make each email individualized.

Accident, Life, Health and Legal Insurance

I also like that it sends the emails individually and not in a mass text, and then gives me analytics to see who is opening those emails.

Director of Operations

There are limitations in email template customization, a potential learning curve due to its feature-rich interface, deliverability issues related to its reliance on Gmail's infrastructure, and a lack of built-in CRM functionalities

Freelancer

The ease of integrations with my Google Sheets (because my CRM is small and something like Hubspot would be an overkill for me), the personalizations, and the automations GMass has built it makes well worth the price.

I’ve been using GMass for a few months now, and it has completely transformed how I manage my email outreach. As someone who relies heavily on Gmail, GMass integrates seamlessly, and I can send personalized mass emails right from my inbox, which is a game-changer.

Publicist

This year, I started my own business and was looking for a way to send mass emails through Gmail with analytics about who exactly was engaging with our pitches.

Manager

Value for Money, Features, Data Management, Security, Customer Support, Email Marketing, Email Templates

Strategy Founder Office

The workflow fits right inside Gmail, so teams get powerful campaign features without switching tools, which speeds up execution and collaboration.

I spent way too much time debugging things like {Station} not matching my spreadsheet, or figuring out that having multiple emails in one cell or even auto-hyperlinked text from Google Sheets could throw off the entire send.

GMass has become the default for outbound and nurturing, consistently lifting open and reply rates while saving hours each week for the team.​

video editing

mail merge and ai features, i can send my campain from multiple gmails without reaching my daily sent limit

Founder

It feels stable and intuitive, and the tracking features for opens and clicks provide exactly the insights I need.

Writer

Helps us each our most important clients when we need to reach them in mass with newsletters or info on new campaigns.

Developer

You are limited to what you can compose in GMail, or by building an email with HTML and importing the raw HTML in yourself.

Director

I really like the ease of installing / integrating the software with your gmail account and then with helpful help of the setup assistant sending out your first bulk email in just minutes.

Marketing Director

While I have used several CRMs such as Hubspot, Salesforce and email marketing tools such as Mail Chimp and Constant Contact, GMass has simplified the process to keep everything within your gmail platform.

agent

My favorite features are: the ability to read spreadsheets, the ability to verify emails before sending and its follow up features.

The customization options are great, and it integrates smoothly with Gmail

Additionally, since it relies heavily on Gmail, any limitations or quirks of Gmail itself can affect performance.

Associate software engineer

best thing is it saves a lot of time and energy as a individual job applier who has a lot of mail id's to send the resume with

The only downside is that if you're managing very large lists, Gmail's sending limits might require you to stagger your emails over time, but GMass handles this limitation well by queuing emails and sending them automatically once limits reset.

I find it very useful for email marketing, and being able to reach multiple clients with the same email.

As someone who runs a small real estate investment business, I needed a tool that would let me reach out to property owners in a way that felt personal—but without spending hours sending one email at a time.

event support

limited free trial resulted in batch sending over the 7 day period, but allowed me to test gMass for a small project.

Occasional quota or API delays can push a send, and clearer in‑app alerts with one‑click reschedule would make those moments smoother.​

Online documentation is thorough, and the company provides multiple examples that should cover practically any use case that you are attempting to accomplish.

It’s a great tool for anyone looking for an efficient way to handle email marketing within Gmail.

The free version of GMass is quite limited, with restrictions on the number of emails that can be sent daily and on advanced features like automatic follow-ups.

Chief Growth Officer

It has made mass mailing much easier and being that it is integrated directly into Gmail and Chrome it has simplified that workflow for me substantially.

GMass has a great product and service for those who want to send more personalized mass mailings but not do it through a mass email system like Constant Contact or Mailchimp.

GMass is a standout in my automation toolkit, offering every feature I need for seamless email campaigns.

Co-founder

The follow up email for users who have opened an email is a pain, I am running a drip and want to be able to pick all users who have opened an email but thats not possible

Real Estate Broker

Makes it very easy for me to see what clients are being emailed and which emails bounced back.

There’s also a bit of a learning curve to fully understand advanced options like automation and personalization.

Associate

The automated follow-ups and open tracking save us so much time. If you’re running a program or managing outreach like we do, GMass is a total lifesaver.

Business Strategist

It also provides tracking tool along with open rates of yoour link and attachements.

Chair

It’s intuitive, reliable, and saves time with features like mail merge, automated follow-ups, and real-time tracking.

It allows me to send personalized emails to large groups of people without overwhelming email servers or getting flagged as spam.

Real Estate Agent

Overall my experience was great, once i figured out how to make a list of all my contacts from the contacts page it crushed.

The learning curve around Gmail sending limits and warm‑up can feel confusing initially, especially when ramping new domains or larger lists.​

Gmass has really upped my performance and reach and also allowed me to increase my income as a freelancer

IT Consultant

Just connect Google sheet, draft a letter , assigning data  and press the RED Gmass button and Viola.

It ensures nothing falls through the cracks and keeps my outreach organized without extra effort.

Choose Gmass and utilize Google's Workspace to truly excel in marketing your business and get people to really talk to you.

The ability to pull contacts, personalize emails, and send at scale was incredibly valuable.

All exportable, and you can go in and see your copy for all the reach out you've done.

I’m genuinely happy with how easy it is to use, especially since it works directly within Gmail, making email campaigns feel seamless and familiar.

phd student

If you're looking for an easy way to send survey emails and get a clear picture of their performance, you should definitely try this extension.

I’ve tried other platforms like Mailchimp and Constant Contact, but they always felt too bulky or impersonal for the kind of targeted, relationship-based outreach I do.

Assistant

Gmass is a great product because it allows me to send out hundreds of emails at once.

Email Sending

Email Campaigns

Reviewers indicate GMass’s email marketing capabilities save them significant time and energy, especially with tools for tracking opens, managing lists, and automating follow-ups. Users report that GMass enables high-quality mail merges, easy personalization, and effective outreach to multiple groups. They say GMass’s integration with Gmail and spam-solving tools make campaigns appear more authentic and less like mass marketing. Users find GMass’s email marketing aspect simple to use, efficient, and helpful for generating leads and maintaining client communication. Of the 36 GMass users who gave detailed accounts of their use of Email Marketing, 97% rated this feature as important or highly important.

Google Sheets Integration

Training and Learning Curve

Marketing for Small Business

Open Rate

Email Sending Limits

Gmail Integration

Small Business

Large Enterprises

Freelancers

Mid-size Business

From newsletters to automated customer journeys—join 700,000 businesses scaling the easy way with MailerLite. 

MailTrack is a free email tracking solution designed to help users manage their emails across Gmail. View email activity, receive real-time notification on updates within emails and track which emails have been opened with MailTrack.

Contact Management

Email Reminders

Monitoring

Subscriber Management

Some reviewers feel Mailsuite offers good value with a generous free version, and they appreciate affordable paid plans with useful extras. Some reviewers find frequent upgrade prompts and aggressive advertising frustrating, and they say premium plans can feel expensive.

The Mailsuite integration most frequently cited by reviewers is Gmail, an email management product rated 5.0 out of 5 for its integration with Mailsuite.

Reviews for Mailsuite come from a wide variety of industries, including marketing and advertising (12% of reviewers), computer software (7%), and human resources (5%). The most frequent use case for Mailsuite cited by reviewers is email tracking (91% of reviewers).

Windows

iPhone

Android

Free

Advanced

Executive Director

Well, apparently I clicked too close to the Unsubscribe and it unsubscribed our admin account and I could not even send an email to our group.

I really loved Mailsuite, it helps to show how many people are opening our nonprofit org's newsletter.

I didn't even know it had happened until I suddenly got an error message saying our admin account had unsubscribed from its own emails.

I believe it would be nicer if I could install it directly on my computer it will be applied directly to my mail app on my laptop because I can only use MailTrack on my browser

Graphic Designer

The ability to track emails even on gmail without having the mailtrack signature or the other person knowing!

The tracking is very helpful and we appreciate it being free since we are limited on funds.

Trainer

I like on this application is that I can merge documents using this as well as track my emails, as a newly promoted trainer, it's very difficult for me to handle my emails, with this application it gave me ease and help.

GMass vs Mailsuite Comparison (2026)

GMass

Mailsuite

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives