GMass: Powerful mail merge for Gmail

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A powerful mass email and mail merge system for Gmail.

Image from store GMass: Powerful mail merge for Gmail

Description from store 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! ----------------------------------------- Key features ----------------------------------------- * 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 ----------------------------------------- Keep up with GMass ----------------------------------------- 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 ----------------------------------------- How does GMass compare to other Gmail extensions? ----------------------------------------- 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

(2025-09-13) Ryan Maguire: GMass has completely streamlined my email outreach. The seamless integration with Gmail is fantastic – I can send personalized mass emails and manage campaigns without ever leaving my inbox. The mail merge functionality with Google Sheets is incredibly powerful, allowing me to tailor messages at scale with ease. I particularly love the automatic follow-up sequences which have significantly boosted my response rates, and the real-time analytics provide valuable insights into campaign performance. GMass is user-friendly, efficient, and surprisingly affordable. It's an absolute must-have for anyone looking to supercharge their email marketing efforts directly within Gmail! Highly recommended!
(2025-09-12) Matt McWilliams: By far the best mail merge tool I've found.
(2025-09-12) Larry Craig: Great tool so far. Love the follow ups
(2025-09-12) Kaija Pack: GMass is super easy to use and perfect for cold email campaigns. It saves a lot of time, and deliverability has been excellent.
(2025-09-11) Gautam khandige: Great system would have loved if followup emails could directly reference the parameters used in the previous emails without needing the sheet.
(2025-09-11) Ariel Blackwood Carroll: Loving GMASS so far - it's really helping our deliverability rating and getting emails to inboxes and out of spam folders. Makes my job in sales much easier and simpler.
(2025-09-11) Dean Shams: I loved the idea of GMass, because I dont want to learn yet another app. I am not a techie. But I found setting up the system to mass send confusing. There were too many items to deal with and each item has so much I need to learn. I accidentally sent out to a list because I clicked the wrong button.
(2025-09-10) leo k: Very premium services. Awesome app!
(2025-09-10) Google Play Support: Very premium services with Discounted price
(2025-09-10) IJEPR Journal: I subscribed GMASS for my Research Journal however even after taking paid subscription, I am not able to send the mass mails. It says you have reached the gmail limits of 500 emails. If I have to send only 500 mails as per gmail limit then what is the use of GMASS. My all the mails through GMASS are not sent.
(2025-09-10) Kratikesh Mishra: GMass has been an invaluable tool for me as a marketer. It’s consistently been my go-to for generating demand and hosting events at scale. Truly worth the investment — I’d highly recommend it.
(2025-09-10) Shrey Raturi: Iam really thankfull to GMass team for making our emails work really easy, its one of the best tools to send mass email.
(2025-09-10) MMM Release: Awesome app! Super helpful and easy to use.
(2025-09-10) Shivam Sharma: I use it mainly for scheduling emails and setting up auto follow-ups and it does both perfectly, right inside Gmail with zero learning curve. Scheduling is super simple, and the follow-up feature saves me tons of time. My only gripe is the small follow-up editor box, but that’s easy to work around. Overall GMass makes email outreach smooth and effortless for me. Highly recommend!
(2025-09-10) arsha seo: GMASS is an excellent tool for anyone working directly out of Gmail. As a daily Gmail user, I found it incredibly convenient for sending bulk emails while still adding personalization to each message. It makes outreach feel natural and realistic. Highly recommend it!
(2025-09-10) Maulik Mehta: Feature rich, robust and affordable. Thank you GMASS.
(2025-09-09) Mycelium Production: Perfect add-on for gmail and cold emailing
(2025-09-09) Emmanuel Abadie: Perfect add-on for gmail and cold emailing
(2025-09-08) Josh Peters: Really great. Only missing thing is that I can't add a followup to an existing campaign once created!
(2025-09-08) Adam Mahon: GMASS is a great direct integration to Gmail. As someone who uses Gmail on a daily basis this was a great way to reach my clients in bulk, also allowing some personalisation and realistic outreach. Would recommend.
(2025-09-08) Bryan Rima: Hello, Gmass is a good app you can work with. That I can attest to. Thank You.
(2025-09-07) Kelly Bernardi: I am so excited about finding Gmass. I was led to it by Chat Gpt when asking the best way to send mass marketing emails. So far the program has been easy to use, effective, and I am loving the insights in the reports. Looking forward to continuing to use it and learning about the features that it has that I have not even applied yet.
(2025-09-07) Fatima-Zahra EL HLIB: Life-saver honestly...wish I knew it long ago!
(2025-09-06) Ujjwal Kumar: Fantastic tool! It's reliable and has been a huge help in my daily tasks. Highly recommended
(2025-09-05) vladislav wanli: GMass is a great tool for email outreach. It’s simple to use, reliable, and makes sending personalized campaigns so much easier. Definitely recommend it.
(2025-09-05) Ken Croskey: It works great! I've been using it for the past 6 years! I highly recommend for anyone looking to do email campaigns.
(2025-09-05) Puneet Swaroop: Perfectly worked for Zoss Water !
(2025-09-04) Hyrum Liddicoat: Great product, but I wish it were more user-friendly. It really needs an email scrubbing feature, and I’m also not sure why my campaign sent 500 emails at once instead of running as a drip campaign like I paid for.
(2025-09-04) Incognito VA: Perfect for a Startup like Incognito VA. Very user friendly.
(2025-09-03) Hally Bellah-Guther: I was really happy when I found this tool and I did sign up for a paid subscription after finding out I couldn't send to more than 50 email recipients in a 24 hour period (not sure if that is the exact rule, but whatever it is, it said I had too many recipients to use the free version. There was a bit of a learning curve for me but it could turn out to be a big help in sending mass emails. Some features I couldn't figure out, like when it gave field to exclude a certain email from the list, it didn't work, but overall it is fairly easy to use.
(2025-09-03) Ellsworth Herring: I absolutely love GMass. It takes all the stress out of running email campaigns — super easy to set up, send, and track. The integration with Gmail is seamless, and the tracking features give me clear insights into opens, clicks, and responses. What used to feel overwhelming is now quick and efficient, and it’s saved me so much time. If you’re looking for a reliable tool to manage and monitor campaigns without the learning curve of big platforms, GMass is the way to go.
(2025-09-03) Zac Heidenry: Gmass has saved me hours now that I'm able to send multiple emails at once. The one thing I need this extension to do it does; hence why I can't give any rating lower than a five
(2025-09-03) Muphony Studios: GMass – The Ultimate Bulk Email Service Provider I’ve been using GMass for a while now, and it has genuinely transformed the way I manage bulk email campaigns. The service is seamless, highly efficient, and integrates directly with Gmail, which makes it incredibly user-friendly compared to other complicated platforms. What I love most about GMass is its powerful personalization tools—I can send bulk emails that still feel personal and authentic to every recipient. The automated follow-ups are another standout feature, ensuring that no lead slips through the cracks, while the detailed analytics and tracking help me measure open rates, clicks, and responses in real time. The fact that everything works right from Gmail makes the process straightforward and convenient, without the need for a steep learning curve. Initially, I started with the monthly subscription just to test things out. But after experiencing the reliability, ease of use, and results GMass delivered, the choice to upgrade to a yearly subscription was a no-brainer. Honestly, I didn’t find any other alternative that matched its balance of simplicity, pricing, and features. Committing yearly has also given me peace of mind and better value. For anyone serious about bulk emailing—whether for business, outreach, or campaigns—GMass is hands down one of the best tools out there.
(2025-09-03) Jesse Steele: makes my day to day job so much easier.
(2025-09-03) Mark Leschinsky: Great software. I've been using it and it has more advanced functionality than I thought!
(2025-09-02) Sir Dante IMT: Well, I never thought I could have a robust all in one Email system. I mean from auto messaging to follow up campaigns, and tracking all in one program, it feels amazing to have this. Great job.
(2025-09-02) Apostolis Lianos: Very easy UI, lots of features, awesome results. Highly recommended.
(2025-09-02) Sharmaine Manuel: I recently tried GMass to test out its email automation features. The setup process was straightforward, and the tool integrates well with Gmail. I had an excellent experience and would recommend it.
(2025-09-02) 70 Ways: I am paying repeatedly to use Gmass but some times it shows in the New Draft email of Gmail other times it doesnt show the Gmass button that is creating panic in the team.
(2025-09-02) DIGITAL HUB1: Gmass is great for fast sending of bulk email to clients. Just connect Google sheet, draft a letter , assigning data and press the RED Gmass button and Viola. Problem solved.
(2025-09-01) Samuel: My experience using Gmass has been remarkable. As a sales manager, using Gmass has helped me tremendously in getting qualified leads consistently. I strongly recommend Gmass for any sales person who is serious about getting results. Gmass really saves time and helps focus on what really matters. Thank you Ajay for this incredible sales tool. As long as I remain in sales, I will keep using Gmass.
(2025-08-31) Richard Jabbour: If you are creative and I am and you need an enabling technology in DRIP campaigns (I wont share all my secret sauce) variables are key and being able to get them into LINKS that send people directly to their own account automatically logged in what my goal. And then I remembered!!! GMASS and problem solved....I had to learn it and make sure I did google sheets right and variables I wanted correctly and it took me about 15 Minutes to test out and launch my first 1348 emails...WOW what a time saver..I sell homes and this bought by days of my time trying to format 1348 individual emails and changing a few links??? no way!!! GMASS
(2025-08-30) Sam: Helps my prospecting journey so much. Thanks!
(2025-08-29) PICKLEBALL GLOBAL COACHING: Amazing system works really well! Easy to set up. What a time saver in sending bulk emails to clients. I can highly recommend this app.
(2025-08-29) Pegiel Grampil: GMass is a great tool—very easy to use, and it’s been giving us excellent results so far
(2025-08-29) Jeffrey Brubaker: WHAT i like is the console imbedded right into your gmail interface.. maks i very easy to run a campaign
(2025-08-28) Nicholas Kaufmann: Gmass is a great tool, easy to use and good results so far.
(2025-08-28) Andrea Pastore: Gmass is a fantastic Gmail extension – super easy to use, reliable, and a real time saver. It makes email campaigns effortless and professional. Highly recommend!
(2025-08-28) Elizabeth Archer: I use GMass at the University of the Western Cape to distribute large-scale institutional surveys (student experience, tutor evaluations, graduate exit surveys). What I like most is how seamlessly it connects with Google Sheets for personalization, and how easy it is to automate follow-ups. The dashboard makes tracking opens, clicks, and replies very clear, and it has saved me a lot of time compared to sending reminders manually. The only challenge I’ve had is with Gmail’s daily send limits, but GMass provides options like SMTP and inbox rotation to work around that. Overall, GMass has been very useful in an academic research and evaluation setting.
(2025-08-28) Kaye Rosal: Very useful on our daily marketing needs. Easier to send bulk emails like a normal person does!

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