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

(2025-08-01) Francesca Conti: GMASS is very user friendly. It save my me and my company a lot of time and the customer service is always good.
(2025-08-01) James Farquhar: It covers all my needs for a medium-sized e-mail campaign involving a lot of 'cold' e-mails. 10,000 recipients spaced out over a month.
(2025-08-01) Client Services: Makes sending mass emails for small businesses, startups, and organizations a breeze, from the comfort of your GMail browser window. Any user, from low-tech to amateur dev to more experienced dev can make powerful use of the feature set that GMass offers, for a fraction of the cost of a commercial mass-mail tool like Mailchimp. Online documentation is thorough, and the company provides multiple examples that should cover practically any use case that you are attempting to accomplish. Tech support is quick and efficient. After vetting many comparable services, we have come back to GMass again and again!
(2025-08-01) Kevin Paul: Can be more cheaper as it is little costly for freelancers.
(2025-08-01) Jason Sangha: great
(2025-07-31) Anthony Longo: Couldn't be easier. Just installed, setup a campaign and executed in under 10 minutes. This is going to be one of my favorite tools ever!
(2025-07-31) Alpharetta House Cleaning: Easy to use and effective sight. Highly recommend.
(2025-07-31) Alex Fall: Works, and the conditional options are very handy.
(2025-07-31) Euro Premium Solar: I’ve been using GMass for a few days and I’m genuinely impressed. It integrates smoothly with Gmail and allows me to send personalized bulk emails directly from my inbox. The mail merge feature works great with Google Sheets, and tracking opens and clicks is a huge plus. The user interface is straightforward, and it doesn’t feel like I’m using a separate tool—it blends right into Gmail. Highly recommended for small business owners and marketers looking for a cost-effective email solution.
(2025-07-31) Joe Cannon: This program has skyrocketed my business and saved me tons of time!
(2025-07-30) Cynthia Gonzalez: WE are running a campaign in our business, and the use of GMASS was extremely efficient and user friendly. And then with the added immediate one on one support given was more than I expected!
(2025-07-30) Brandyn Buchanan: extreme ease of use + easy to train, share, and communicate about. a powerhouse peer to, "instantly" an with even easier learning curve. take community seriously with gmass.
(2025-07-30) albert radzicki: really cool extension
(2025-07-30) Pedro Luchsinger: The free plan doesn't do much (only 50 mail-campaigns). But he cheapest paid plan is working great! Just started a 2000 lead list campaign, we'll see how it goes!
(2025-07-29) Laxmi Palace Heritage Boutique Hotel: nice software to use. i will not recommended any other except this. Thanks
(2025-07-29) Laxmi Palace: Have used first time this kind of tool and i love the ease of doing work here
(2025-07-29) Rebecca Liu: Sent 400 emails in less than a minute! I remember where I would copy and paste email addresses in the field for potential client! Wow what a time waster! Easy to set up the SPF, DKIM and DMARC yourself too to prevent your message for going to spam, Google and Gmass has clear instructions on this which was nice that I didn't need to hire a professional!
(2025-07-29) Jainam Shah: great extension . good support from technical team .
(2025-07-29) Presley Kappana: Saved me from sending 800 emails manually to test a products validity.
(2025-07-29) vishal iyer: An Absolute Game-Changer for Email Marketing! I've been using GMass for past few days months now and it is the best Chrome extensions for anyone who relies on Gmail for outreach or campaigns. The mail merge features are incredibly powerful yet easy to use and it allows seamless integration with Google Sheets. The ability to personalize emails at scale, schedule follow-ups automatically, and track opens/clicks are awesome and can save hours of our crucial time. Highly recommended.
(2025-07-28) Samantha Davis: GMass has been a useful tool for managing outreach through Gmail. The mail merge features are easy to use and save a lot of time. Still exploring some of the advanced functions, but so far, it’s made my campaigns smoother.
(2025-07-28) Adela Hadzic: We love this extension. It's saved us so much time and integrates directly through our email system! Would definitely recommend.
(2025-07-28) Taylor Bazos: Love this extension! It makes it super easy to send mass yet customized emails and has saved me hours of time. Thank you!
(2025-07-28) Elio Sonic: Very good, they don't care much about my excel format like normal gmail merge do.
(2025-07-27) Alysson Artuso: The tool to send emails from multiple accounts is very useful, but if you use only one account, you need to be very lucky to send up to 500 emails
(2025-07-27) Mordy Friedman: It works ok but only sometimes. A times it shows 100 percent opens which is obiouslvy not accurate.
(2025-07-27) Robert Hunter: Super user friendly and easy to understand how to use the software inside of gmail. Pricing is the best on the market and tracking data is easy to understand. Definitely recommend giving it a go as the price is so low its almost risk free.
(2025-07-26) Lara Kilpatrick: I installed and used GMass for the first time yesterday and I am so pleased by the whole experience! It was very easy to install (our nonprofit uses Google Suite which made it especially easy), and then it was extremely simple to connect to the Google Sheet with my data, as well as copy and paste the content for the email, and add the merge fields. The campaigns Dashboard is also simple and provides most all the data one might need to understand the success of an email blast. For example: My email had a 100% open rate, which was great to be able to see within 24 hours. I look forward to continuing to use GMass for those times when I want to send a personalized email "from me" to 100s of contacts.
(2025-07-26) Victor Vaes: I had a pleasant time working with Gmass, the extension operates very nicely and is structured in a logical easy way. I would reccomend Gmass to people who need to send multiple e-mails with a mail merge like function. The extension also had many usefull features that I didn't even know existed but these all turned out to be very usefull, in particular the 'spam checker' function proved as a very reliable and reassuring tool control confirm that my mails where reaching their correct destination.
(2025-07-26) Legit Realty Solutions: Exceptional tool for any business owner looking for email automation solutions. How easily compatible it is to gmail is such a benefit as well as the great support and links to answer about every question you may have, try them out today! The only reason I am leaving them is because I am looking for a more complete tool (eg. Ringless Voicemails, SMS Campaign, etc.) and even then I'll probably come back!
(2025-07-25) Reid Scott: Works very well and is super easy to use. Love how simple the interface it would definitely recommend.
(2025-07-25) Phil Weaver: A top tool in my automation bundle with all the features I need. So easy to construct personalized emails with a little planning, and if that's not enough, they will spin them for you (haven't required the spinner but really like that it's there. They have deliverability expertise. Nudging me along to implement best practices. The follow-up system is good enough. Build it. Forget it and let it run. Great tool!
(2025-07-25) Jared Winn: The tool took a few minutes to start sending and went off without a hitch. I would highly recommend this tool for cold outbound.
(2025-07-25) Weinsoft Team: GMass is a great tool for email outreach—user-friendly, efficient, and extremely cost-effective for what it offers. Whether you're sending cold emails or setting up automated follow-ups, the interface is intuitive and easy to master, even for beginners. The only downside is the limitation on the free trial—you can send barely 10 emails per day, including follow-ups, which makes it hard to properly test for serious use cases before upgrading. That said, once you're on a paid plan, it’s absolutely worth it.
(2025-07-24) leo baker: GMass is perfect bulk email sender, Its makes very easy for us to send emails in bulk thanks gmass.
(2025-07-24) Alex Dobson: Absolutely game changing tool for anyone doing comms!
(2025-07-24) Trey Knight: Amazing, no brainer to subscribe after my trial, that's rare. Unlimited campaigns, cold outreach, auto follow ups and more. This thing is simple to use, believe me I'm not a tech wizard. Thank you GMASS you truly make it possible to work smart and efficiently as an AE in the digital media world.
(2025-07-24) Umama Khursheed: Gmass has always been one of the most convenient and easy to do mail merge option. I always prefer Gmass over other mail merge tools.
(2025-07-23) Chimamanda Eze: This is an amazing service! I wanted to just use the free trial to see how much value it would add, and I immediately subscribed once I got my first campaign out and its report back. At first, it did seem like there was some bug as the campaigns would not actually send despite hitting the correct button several times. The same error about the mail merge tags that I was using kept coming up each time. When it did eventually send, I was thoroughly pleased with the outcome. In particular, I appreciated the bcc feature still working with the merges as well as the ability to still merge replies to certain recipients in the thread from the original campaign. Yet to find any issues since the first bug I encountered
(2025-07-23) Ali T Alwatan: Great tool to use, saves time and makes marketing my business more efficient and allows me to do more in less time. Not many tools like this out there that you can trust that are easy to use and affordable
(2025-07-23) Dr. Tinita K.: Makes my life 1000 times easier and is simple to use for what I use it for. Wish there was a cheaper lower level subscription for those of us who only need to send individualized mass emails without any other bells/whistles. Still recommend!
(2025-07-23) Tiffany Mann: Absolutely love this. To be able to have all the information gathered into one spread sheet and it pull the data out into multi personalized email for one message is amazing. Saves so much time and I can review how many people open and read it.
(2025-07-23) Jesus Rodriguez: I really like GMass. It is the most effective tool I have found for sending email campaigns in Gmail. Everything works great, and I have never had any problems. I highly recommend GMass if you need to send emails to many leads. From now, no major problems and works 100%
(2025-07-22) rieno sports: i Love GMass its easy to use and very simply we can send bulk emails and very easy to followup definitely try it out!
(2025-07-22) Ela Jablonska: I just bought the premium package, I am really happy with the results. This program is user friendly and makes mass emailing a breeze. I recommend it.
(2025-07-22) Jessica Barrett: Great service
(2025-07-22) Yacine GUEDOUANI: Great app, easy to use, and much cheaper than Instantly and other competitors. I only wish it was a bit easier to track the campaign performances, A/B testing etc. Otherwise, great app to use if your outreach campaigns aren't really complex
(2025-07-22) Patricia Apple Andoy: I used GMass in my previous role and continue to use it in my current company. It's very easy to use!
(2025-07-21) Mark: I recently started using GMass for my mail merges. What stands out for me is the ease in using in and the tutorial's when needed. As I am sending out links in the message the "campaigns dashboard" helps tremendously to track who's opened the email and clicked on the link. This makes follow ups much easer to do! When looking at the user experience it is Simple to use and is great for campaign management. I have used other mail merge apps and GMAss is hands down the BEST!
(2025-07-21) Clear Debts Plan: Gmass works really great !! Would recommend this to everyone.

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