A Gmail mail merge extension sends one email to a list of people from your own Gmail, filling in names and other details so each message reads as personal. Several add tracking and follow-ups. Compare the users count, ratings count and last updated date before you install one. Eight follow in no particular order.
Mail merge means one message, many recipients, each with their own name and details dropped in. These extensions bring that into Gmail through Chrome, and going by their listings several add email tracking, scheduled sends and automatic follow-ups on top.
The eight are listed alphabetically and in no particular order. Users, average rating, ratings count, publisher and last updated date come from each Chrome Web Store listing, as of Oct 2026. If you're still building the list you'll send to, start with my guide on how to build an email list using Gmail.
Eight Gmail mail merge tools in one table
Type and Good for reflect what each listing says about itself. Yes in the last column means the listing says the extension is free in some form; Not stated means it doesn't say either way, as of Oct 2026.
| Tool | Type | Good for | Free plan |
|---|---|---|---|
| EmailMassa | Portuguese mass email sender | Mass email and mail merge from Sheets, in Portuguese | Not stated |
| GMass | Mass email and mail merge | Mass email campaigns and mail merges inside Gmail | Not stated |
| Mail Merge for Gmail (Free Apps) | Simple multi-recipient sender | Sending one email to many people with names filled in | Yes |
| Mail Merge for Gmail (Mailmeteor) | Merge with tracking | Mail merges with email tracking and auto follow-ups | Not stated |
| MassMerge | Cold email and merge | Cold email, mass mail and mail merge for Gmail | Not stated |
| MergeMail | Merge for Gmail | Mail merges with scheduled emails | Yes |
| Salesforza Gmail Mail Merge and CRM on GSheets | CRM and merge on Sheets | A Gmail CRM built on Google Sheets, with mail merges | Not stated |
| Streak Mail Merge for Gmail | Tracked mass email | Personalised, tracked emails and follow-up sequences | Not stated |
Eight ways to mail merge from Gmail
EmailMassa
Best for: Portuguese speakers who want a mail merge that runs entirely in their language, pulling contacts from Google Sheets, from emailmassa.com.
GMass
Best for: Running mass email campaigns from Gmail with the extension that has the most users here, from gmass.co, with 9.2K ratings as of Oct 2026.
Mail Merge for Gmail (Free Apps)
Best for: Sending a simple personalised email to several people at once, from a listing by Free Apps that says it's 100% free.
Mail Merge for Gmail (Mailmeteor)
Best for: Mail merges with tracking and automatic follow-ups built in, from Mailmeteor, whose listing averages 4.9 from 204 ratings.
MassMerge
Best for: Anyone comparing smaller cold email tools, keeping in mind this listing was last updated on May 12, 2023.
MergeMail
Best for: Small sends that fit a daily cap, since its listing from RENTROOM LLC says you can send up to 50 emails a day for free.
Salesforza Gmail Mail Merge and CRM on GSheets
Best for: Keeping contacts in Google Sheets as a light CRM and merging from them, from Salesforza Inc, with 848 users.
Streak Mail Merge for Gmail
Best for: Personalised, tracked emails with follow-up sequences, from streak.com, a listing that was updated on October 28, 2026.
Where the mail merge numbers don't line up
GMass shows 400,000 users and 9.2K ratings, as of Oct 2026, far more of both than anything else here. Streak Mail Merge for Gmail is the odd one out: 10,000 users but just 4 ratings. MassMerge shows 19 ratings on 378 users and was last updated on May 12, 2023, the oldest date on the list.
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The averages run from 2.7 to 5.0, and that 5.0 belongs to EmailMassa, a Portuguese language listing with 6 ratings and 245 users. A perfect average from six people tells you far less than a 4.7 from thousands, so read the count before the stars.
Choosing a merge tool for the way you send
- You send the odd personal email to a small list: pick a simple merge extension with a clear free allowance on its listing.
- You run cold outreach: pick one whose listing names follow-up sequences and tracking.
- Your contacts live in Google Sheets: pick one that says it works from Sheets, or one that doubles as a CRM on Sheets.
- You want to schedule sends: pick one whose listing mentions scheduled emails.
- You write to customers in Portuguese: one listing here is built in Portuguese from top to bottom.
Before your first merge goes out
- Send a test to yourself and check that every merge field filled in.
- Read each listing's sending allowance before you plan a big send.
- Check the Offered by line and the last updated date.
- Keep your list clean, because old or bought addresses hurt your sending.
- Give people an easy way to opt out of future emails.
When replies start coming in, my guide to handling cold email outreach responses covers what to say next.
Do you make a mail merge extension for Gmail? Tool makers can ask to be considered for a featured place on this list.
My plain advice on Gmail mail merge
Match the tool to the send. A small one-off mailing needs a simple merge, while cold outreach needs follow-ups and tracking built in. Whatever you choose, compare who offers it, the users count, the ratings count and the last updated date, and run a test to yourself before the real list goes.
If your list keeps growing, a full email platform makes more sense than a merge from your inbox, and my list of email marketing tools worth paying for is a good place to start.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
What is a Gmail mail merge add on?
It's an extension that sends one email to many people from Gmail, filling in each person's name and details so every message reads as written for them. Several listings here add tracking and follow-ups.
Are Gmail mail merge extensions free?
Two of the eight listings say they're free in some form as of Oct 2026, and one of those gives a daily allowance of 50 emails. The rest don't say either way on their store pages.
Which mail merge extension has the most users?
The largest listing here shows 400,000 users and the smallest 245, as of Oct 2026. Look at the ratings count and last updated date as well.
Can I send follow-ups automatically from Gmail?
Several listings here mention automatic follow-ups or follow-up sequences, so look for those words if outreach is what you're doing.
Does mail merge work with Google Sheets?
Some listings here say they pull contacts from Google Sheets, and one describes itself as a CRM built on Sheets.
