GMass: Powerful mail merge for Gmail
Extension Actions
- Extension status: Featured
A powerful mass email and mail merge system for Gmail.
The easiest way to transform Gmail into a cold outreach, email marketing, and mail merge platform.
** Join the almost 400,000 others who’ve given us an average of 4.8 out of 5 stars **
No credit card required + send 50 emails per day free during your free trial!
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Key features
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* Send cold email and email marketing messages to thousands of addresses
* Unlimited contacts, campaigns, AND emails
* Mail merge personalization with data from Google Sheets
* Personalize each mass email (even send personalized images and attachments)
* With GMass MultiSend's inbox rotation feature, you can distribute your campaign across multiple accounts!
* Hit the inbox, not the spam folder. 99% of GMass users report the best deliverability they’ve ever had.
* Spam Solver - test messages before you send to find spam rates, then use suggested tweaks to improve
* Send auto follow-ups based on opens, clicks, and replies. NEW - Send any stage of follow-ups on demand.
* ChatGPT campaign creation — generate an entire email campaign, follow-ups, and GMass settings by typing in a prompt
* Automatically skip sending emails and automations on holidays, and choose custom days of the week to send/not send a campaign
* Send triggered emails that go out automatically when a recipient opens or clicks — reach your prospects when you know they're in their inbox
* Automate your outreach by automatically sending to new contacts in your Sheet using GMass's recurring campaigns
* Connect your CRM or other apps using the GMass API or Zapier
* Track opens, clicks, and replies — with instant reply and bounce detection. No more delays; see replies and bounces in your report in a matter of seconds.
* Free email verification — verify email addresses before you send your campaigns
* Set DKIM through GMass for authenticated sending with a SMTP server.
* Help with the new Google/Yahoo bulk sender requirements is here - https://www.gmass.co/blog/gmail-bulk-sender-guidelines/. We've also created a one-of-a-kind system to help users with free Gmail addresses sending campaigns via a SMTP server pass DMARC - https://www.gmass.co/blog/gmail-smtp-dmarc/
* Emails can be sent as replies to the last conversation you had with each recipient
* Unsubscribe and bounce management to automatically process unsubs/bounces, suppress future messages to those addresses, and more.
* Hundreds of other features: Schedule emails, throttle sending speed, custom tracking links with SSL, A/B testing, spintax for varying up your copy, quick email polls with custom landing pages, add a countdown timer to emails, drip campaigns, HTML editing, use Gmail's built-in layouts for email marketing, 1-click replies, reusable templates, one-click social media sharing of campaign results, and so much more
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Keep up with GMass
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Website: https://www.gmass.co
What makes GMass different/better? https://www.gmass.co/blog/what-makes-gmass-better/
Quickstart guide: https://www.gmass.co/quickstart-guide
Blog: https://www.gmass.co/blog
Twitter: https://twitter.com/GMassForGmail and https://twitter.com/PartTimeSnob
YouTube: https://www.youtube.com/gmass/
Support: https://gmass.co/g/support
Latest updates: https://www.gmass.co/updates
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How does GMass compare to other Gmail extensions?
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Mixmax: cool extension, but you have to use its external web portal to send campaigns. With GMass, the magic happens inside Gmail, using just the red GMass button.
Yesware: similar to Mixmax, you can't send campaigns inside Gmail. You have to use their web interface.
Plus, both Mixmax and Yesware are more expensive than GMass.
Mailtrack and Snov.io: Lets you track individual emails, but with GMass, you can eliminate Mailtrack and Snov.io because GMass can track both individual emails and campaign emails. Use the GMass button on both one-on-one emails and campaigns.
Copper: Good CRM system, but not meant for sending email campaigns. Same for
Gmelius and Streak CRM.
Lastly, GMass works seamlessly with Grammarly to ensure your campaigns contain perfect prose and are error-free.
Latest reviews
- Dave S
- Not as user friendly to start but once you learn verify simple.
- Adrian Guillen
- Easy to setup and exactly what I was looking for. Couldn't use mail chimp for cold emailing, so this was a great alternative.
- ahmed flaifl
- I had a really great experience with G Mass. From the moment I walked in, everything felt well-organized and welcoming. The team is professional, friendly, and genuinely cares about providing a high-quality experience.
- Mickey Cruz
- I use GMass for my daily outreach because it’s simple, efficient, and easy to navigate. I really value its features that help prevent my emails from going to spam, and it makes sending personalized outreach at scale much more effective.
- Gigi Bennett
- I am SO glad I found GMass! I was searching for a simple tool to use mail merge in Gmail after working in Microsoft-based organizations for my entire career. GMass is SO much more than a mail merge tool. I love the data it provides on bounces, blocks, open rates, and clicks. Someone opened an email I sent three weeks ago today and I got a notification -- amazing! My only complaint is that nonprofit and education discounts are only for emails ending in .org or .edu.
- Michael Carroll
- Works great easy to use
- Mickey Hardy
- Good tech
- Ania
- Very easy and affordable tool to use, especially if you want your emails to look personalized!
- Lorenzo Ballarin
- Amazing system worked great for me!
- Avery Isan
- Great, simple tool
- Social House Collab
- This tool works really well and exactly what I needed.
- Ches F.
- Gmass is really helpful for our team specially when managing and running campaigns. Using this tool is worth the price!
- gueco vong
- I've been testing GMass for bulk outreach and mail merge campaigns, and overall it's a powerful tool, especially for those who prefer working directly inside Gmail instead of using a separate email platform. What I like most is the flexibility — you can personalize emails, use features like Spintax, and control sending speed, which is very useful for avoiding spam filters. It’s also quite convenient to manage everything within Gmail. There is a bit of a learning curve at the beginning, especially when connecting Google Sheets or setting up campaigns correctly. Some steps are not very intuitive for first-time users. But once you get used to the workflow, it becomes a very efficient solution for outreach. Overall, a solid tool with strong capabilities, especially for users who want more control compared to traditional email marketing platforms.
- Ardita Hamiti
- One of the best tools to make your job easier!!
- Storm Solutions
- Good resource for marketing. Easy to use.
- Dan @ Collabo
- I was 🤏🏾 close to signing up to another platform, then I came across GMass. Does what is says on the tin. Cool tool!
- Chris Roessing
- I love it. Easy to use, great analytics. Definitely a must have!!
- Christian Gardner I
- This is excellent. I am using it for blast emailing AI solutions pitches. It is the best thing I've ever had I made 4K in 1 day with it from clients. Highly recommend if you want to be sucessful.
- Trevor Morgan
- I use Gmass for all my email marketing and it is so easy to set up, consistent and just overall great product
- Garrett Brustein
- Easy to use, good value, lots of good campaign settings.
- Contact Office
- Value For Money.
- Grace Ladies
- Works great for my campaign!
- Jamie Licosati
- Straightforward and easy to use
- The Pique Agency
- GMass has been a total game-changer for my workflow. I send hundreds of emails every week, and the follow-up feature alone saves me hours. I can’t imagine trying to manually track who has and hasn’t responded. It takes the stress off my plate and makes sure nothing slips through the cracks. I also love that it works directly inside Gmail, so there’s no need to juggle multiple platforms. I haven’t even tapped into everything it offers yet, but it’s already made my outreach process so much easier. Highly recommend.
- Meahbelle Sabado
- GMass has made my work so much easier. It sits right inside Gmail, so there's no extra platform to learn. The automated follow-ups and mail merge features save me a ton of time every week. It's simple, reliable, and actually does what it says. If you're doing any kind of email outreach, this tool is worth every penny.
- Matthew Abandy
- Amazing product, has helped me reach out to so many leads!!
- Mark Elias
- Extremely easy to use and love the ability to manage multiple things at once.
- Chandini Ammineni
- Love the capabilities of the app. Super powerful. I do wish the onboarding instructions were clearer; I had to watch a review on YouTube to learn how to set up my first campaign. I also made the mistake of deleting the tab in the Google Sheet before the follow-ups were sent, and again had to struggle through figuring out how to manually schedule the follow-up send. The 4 stars is because the tool is powerful, but the onboarding is a bit figure-it-out-yourself. I'd also really like to see the campaign report dashboard improved so it's easier to see what happened with the follow-up emails.
- Hiren Hirpara
- good for marketing perpose.
- Aaron Rollins
- great program! easy to use and gets the job done :)
- Bia Schelbs
- I have been using Gmass for 6+ years now and I don't switch this for nothing! It's the best way to send campaings and it's great because you don't need to add all the time new leads to the outreach - it collects automatically from the sheet - very deep campaing settings too! I think the platform could improve reports interface a little bit and maybe have a better interface for newsletters but anyway, I love it and share with everyone I know :)
- Joshua Leitson
- I just started using Gmass. It's going well.
- Olu Balogun
- GMass has honestly made email outreach so much easier for me. The setup was straightforward, and I like how it works directly inside Gmail instead of needing a separate platform. The personalization features are solid, and the ability to track opens, clicks, and replies in real time has really helped me improve my campaigns. It’s simple, efficient, and does exactly what I need without unnecessary complexity.
- Jigar Upadhyay
- Overall this tool is really feasible and easy to run. I am using this tool for my personalized email in my work.
- Mike Dowdy
- I am a bootstrapped founder of a voice AI company. Lately I have been spending way to much time on email delivery programs like MailChimp, instantly.ai, ... These programs are fine if you got hours in the middle of the day to learn another interface. Time is a luxury I don't posses. Learning another mail delivery program is not a revenue generating task I just wanted a mail delivery program that delivers mail. What I like about GMass is that it takes a first principles approach to e-mail delivery. It delivers e-mail through Gmail not HTML editors are other pointless features. It took me some time to get used to doing everything inside Gmail. I wish there were more how to videos. I gave GMass 5 stars because it makes my life less complicated. Simple beats complicated every time.
- Ravi Thakur
- Easy to use and great to be inside Gmail.
- Nick Brown
- GMass is the Swiss Army knife of email marketing. It’s perfect for cold outreach, internal company updates, and newsletters. If you want to spend less time designing emails and more time getting replies, this is the tool to use.
- Dhirender Recruitment Consultant
- its very professional and useful tool for email marketing
- Uttam Gupta
- GMass has completely transformed my cold outreach game. As someone who runs email campaigns for lead generation, the ability to send personalized mass emails directly from Gmail — with open/click tracking, follow-up sequences, and Google Sheets integration — is a massive time-saver. The deliverability is far better than most standalone email tools I've tried. The campaign analytics are detailed and easy to act on. Setup takes under 5 minutes and it works seamlessly within Gmail without any learning curve. Highly recommend for marketers, founders, and anyone doing outbound sales at scale
- Todd Johnson (LegalShield Associate)
- I got introduced to Gmass 6 years ago and after picking it back up, it has completely made my workload so much easier. I run a few different businesses, and staying on top of follow-ups used to be one of the hardest parts of my day. What really stands out is how it handles the follow-up process for you automatically. That alone is a game changer, especially when you’re juggling a day job and don’t always have the time to manually stay on top of every lead or conversation. If you’re someone who needs consistent outreach but can’t always be hands-on, this tool is exactly what you need. It keeps things moving even when you can’t. Game changer.
- Tifin Nadia
- many interesting options and very easy and intuitive to navigate
- Laurent Hercz
- Easy to use and great to be inside gmail and deal automatically with drive
- Emily Harris
- Honestly love the product overall, always deliver above expectattions
- Daniel Smith
- GMass is hands down the easiest cold email outreach tool I’ve ever set up. From start to finish, the process is incredibly straightforward—no complicated onboarding, no steep learning curve. If you can use Gmail, you can use GMass. What really stands out is how seamlessly it integrates right into your inbox. You don’t need to juggle multiple platforms or learn a whole new system. Upload your list, write your email, and you’re basically ready to go. Personalization, scheduling, and follow-ups are all simple and intuitive. For anyone looking to get started with cold outreach quickly—without dealing with clunky software—GMass makes it almost effortless. It’s a huge time-saver and perfect for beginners and pros alike.
- Tama Yuri
- this is really helpful for me to send mass emails in just one single click!
- James Wright
- So far so good. We are a start-up looking for a simple system that integrates with our google eco-system. The team love it!
- Hostera Team
- best for beginners, to use email tracking to monitor opens and engagement.
- Robin Irving
- Great product. Works well. Specially made for email management for sales, campaigns and personal use. Highly recommended.
- Sara Portner
- GMass is great! It's so easy to use and makes mass emails feel more personal!
- Rouel de Asis
- Today is my first time using GMass. So far, I enjoyed using the program. There are no complex processes for installing the software, it seamlessly integrates into Gmail, giving me a simple way to send personalized emails through an email campaign. Despite being a new user, the platform is user-friendly and I did not have any difficulty navigating through. The features such as mail merge were efficient for personalized emails, while the opens and click tracking helped get some insight on the email. Overall, GMass has proven to be an efficient solution for sending email campaigns.