The best mail merge for Gmail isn’t the one built into Gmail.

I know that sounds weird, but it’s objectively true.

Even though there’s a native Gmail mail merge tool — and has been for a few years now — it’s limited. For most emailers… too limited.

Instead, if you’re looking to send a mail merge Gmail campaign where everyone’s getting their own, individual, personalized emails, your best bet is going to be with one of the third-party software tools.

In this article, I’ll cover the popular Gmail mail merge tools you’ve likely come across in your research. And I’ll break down their biggest pros and cons to help you make a smart decision for your future campaigns.

Best Mail Merge for Gmail Software: Table of Contents

• 5 Things to Look for in a Gmail Mail Merge Tool
• The 8 Best Mail Merge for Gmail Tools
  • 1. GMass – best overall
  • 2. Gmail’s built-in tool – best free option for simple merges
  • 3. Yet Another Mail Merge (YAMM) – best cheap option
  • 4. Mailmeteor – best for non-Google users
  • 5. Mail Merge with Attachments – best for simple merges
  • 6. Streak CRM – best for users who need a CRM
  • 7. Mergo – best for ultra low cost with lite automation
  • 8. Mailsuite – best for tracking-first emailers
• Best Mail Merge for Gmail: Next Steps

5 Things to Look for in a Gmail Mail Merge Tool

Quickly, before we dive into the options, let’s cover the factors you should keep in mind when you’re gauging which tool will work best for you.

1. The integration method

Do you want the tool to work inside Gmail or are you okay managing campaigns through a separate platform?

• If you want to write and send mail merge messages in Gmail, look for Chrome extensions.
• If you’re looking for a lot of back and forth between Gmail and Google Sheets, you’re going to lean toward Workspace add-ons.
• If you don’t mind learning a new app, check out the standalone platforms.

2. Personalization that meets your unique needs

You don’t have to pay for a mail merge campaign if you just want to insert people’s first and/or last names. Gmail’s built-in mail merge does that.

But if you want to create personalized emails that actually resonate because they go deeper than a name, check out the other software options.

Also, keep a close eye on if your platform has the mail merge personalization features you need now and anticipate you’ll need in the near future.

In my experience, pretty much everyone has some mail merge “need” that’s more advanced than inserting a first name.

For instance, might you want to include personalized intros or paragraphs? Images? Links? Attachments? Maybe you want to be able to use fallback values when you don’t have someone’s data; or if… then statements for even more advanced personalization.

Don’t choose a platform that’s going to leave you wishing it could do more — because there’s at least one app on our list that can.

3. Automation and follow-ups

Your first message in a campaign is just that: The first message.

Odds are you’re going to need to follow up.

Does your tool do automated follow-up sequences if you need them?

If your outreach requires a dash of persistence, look for software that supports sequenced campaigns and trigger-based follow-ups.

4. Deliverability features

In theory, mail merge can help your deliverability because:

1. You’re not blasting out a million identical messages, which is a spam red flag.
2. People are more likely to engage with personalized messages, which sends positive signals to the email providers.

But deliverability doesn’t start and end there.

The best Gmail mail merge tools do their part to help your inbox rate with everything from throttling to scheduling to diagnosing spam risks before you send.

If a platform doesn’t mention deliverability, assume it’s not a strong point. And if they do mention deliverability, make sure they provide clear evidence of how they actually impact your inboxing rate.

5. Sending limits

Did you know Google puts a limit on how many people you can email in a day?

On a free gmail.com account, your limit is up to 500 people in 24 hours — but it can be far less on a new account. On a paid Google Workspace account, your limit is up to 2,000 people in 24 hours — but again, your limit may be far lower.

And that’s all the emails you send from your account that day, not just your mail merge campaign.

How big are the mail merge campaigns you’re planning to send? If they’re larger, look for a platform that can help you break Gmail’s limits while staying within Google’s terms of service.

The 8 Best Mail Merge for Gmail Tools

Here are 8 of the top apps for running mail merge campaigns in Gmail.

1. GMass – best overall

• Method: Chrome extension (works directly inside Gmail)
• Quick Summary: GMass was the first tool to bring mail merge inside Gmail, and remains one of the most popular and powerful mail merge tools for Gmail today. It’s built directly into your Gmail inbox. It’s designed for simplicity but has the largest feature set of any tool, whether you’re sending a small batch of emails or a massive outreach campaign.
• Biggest Pros:
  • Seamless Gmail integration — no need to learn new software.
  • Advanced personalization and automation features, including auto follow-ups, A/B testing, and triggered emails.
  • Powerful email deliverability tools to avoid spam folders, in particular Spam Solver (among many others).
    Break Gmail’s daily sending limits.

• Biggest Cons:
  • Works only with Gmail, Google Chrome, and desktop (not mobile).
  • Since GMass is a full email sending platform, it costs a little more than some of the simple “one-off merge” tools.

• Best For: Anyone looking to do a mail merge that really works. Includes marketers, sales teams, nonprofits, and anyone who wants simple-to-use but advanced personalization and automation directly inside Gmail.

Check out GMass.

2. Gmail’s built-in tool – best free option for simple merges

• Method: Built into Gmail
• Quick Summary: Gmail introduced its own mail merge tool in 2023. In 2024, they improved the tool to work with a Google Sheet.
• Biggest Pros:
  • Included free with Google Workspace. (You’re paying for Workspace, but don’t have to pay extra on top of that for the mail merge.)
  • Does not require any additional software, add-ons, or extensions.

• Biggest Cons:
  • Not for real mail merge use, as it can only do basic merging.
  • Not included in free Gmail accounts.
  • Obviously not a single other advanced feature (follow-ups, automation, advanced scheduling, A/B testing, and on and on and on).
  • Cannot be used for cold outreach.

• Best For: Users looking to send one-off messages with basic mail merge personalization.

Check out Gmail’s mail merge tool.

3. Yet Another Mail Merge (YAMM) – best cheap option

• Method: Google Workspace add-on (works inside Google Sheets)
• Quick Summary: YAMM is a popular option mostly because it’s really cheap. At its price, it’s missing a ton of features that the other popular apps have — but again, it’s really cheap.
• Biggest Pros:
  • Simple setup and relatively easy to use.
  • Can do more personalization than Google’s built-in mail merge.

•  Biggest Cons:
  • Tons of missing features compared to other software.
  • Strict sending limits.
  • No automated follow-up sequences or any other advanced (or semi-advanced) features.
  • No deliverability tools.

• Best For: Casual users who want a quick and easy way to send basic mail merge campaigns from Google Sheets. It’s a half step up from Gmail’s free tool but several steps down from the more developed apps on this list.

Check out YAMM.

4. Mailmeteor – best for non-Google users

• Method: Google Workspace add-on (works inside Google Sheets, in its own app interface)
• Quick Summary: Mailmeteor is a merge add-on that works for Google products as well as Microsoft ones. You’ll use its compose window and interface for creating messages.
• Biggest Pros:
  • Free plan. Though the plan is extremely limited, it could work for those sending small, low-feature campaigns.
  • Options to work with different platforms (Gmail, Outlook) and software (Excel, Google Docs).

• Biggest Cons:
  • No advanced features (automation, deliverability, and so on).
  • Limited reporting and analytics.
  • Extremely tight sending limits.

• Best For: People looking to send modest volumes using software other than Gmail and Google Sheets.

Check out Mailmeteor.

5. Mail Merge with Attachments – best for simple merges

• Method: Google Workspace add-on (works inside Google Sheets)
• Quick Summary: This add-on is specifically designed for sending personalized emails with attachments directly from Google Sheets.
• Biggest Pros:
  • Good for sending files like invoices or reports.
  • Simple and reliable for basic use cases.

• Biggest Cons:
  • Outdated interface and feature set.
  • No deliverability features.
  • There are other platforms that can send mail merges with attachments, and those also have the modern campaign management tools this platform lacks.

• Best For: Simple merges. Possibly someone who wants a little more power than YAMM or Gmail’s built-in tool (but not too much power) and doesn’t have the campaign management needs to use GMass.

Check out Mail Merge with Attachments.

6. Streak CRM – best for users who need a CRM

• Method: Chrome extension (works directly inside Gmail)
• Quick Summary: While primarily a CRM, Streak offers built-in mail merge features ideal for sales and relationship management teams working directly out of Gmail.
• Biggest Pros:
  • Full CRM capabilities alongside mail merge.
  • Great for managing sales pipelines within Gmail.

• Biggest Cons:
  • Mail merge features aren’t as advanced as dedicated tools. They’re the secondary product, so the CRM gets the majority of the love.
  • Can feel bloated and unnecessarily pricey if you don’t need the CRM functionality.
  • Limited sending and other advanced tools.

• Best For: Sales teams looking for an all-in-one sales platform and CRM that works inside Gmail.

Check out Streak.

7. Mergo – best for ultra low cost with lite automation

• Method: Google Workspace add-on (works inside Google Sheets)
• Quick Summary: Mergo has a similar feature set and pricing to YAMM — that is, it’s lower cost but lacks quite a few features. Unlike YAMM, however, Mergo does have some basic automated follow-up ability.
• Biggest Pros:
  • Low cost.
  • Supports automatic follow-ups.

• Biggest Cons:
  • Lacks any advanced features or deliverability tools.
  • Reporting tools are basic.
  • Strict sending limits.

• Best For: Someone looking for an ultra low cost mail merge tool who wants automation (which YAMM doesn’t have) but isn’t concerned about things like analytics or more sophisticated mail merge features.

Check out Mergo.

8. Mailsuite – best for tracking-first emailers

• Method: Chrome extension (Works directly inside Gmail)
• Quick Summary: Mailsuite started as an email tracking tool but has since expanded to offer some email campaign functionality, including mail merge.
• Biggest Pros:
  • Heavy focus on email tracking. Other software tools also have tracking, but that’s Mailsuite’s core business.
  • Can add Gmail signature requests.

• Biggest Cons:
  • Simple interface that’s still somehow complicated to use for mail merge.
  • Since email campaigns aren’t their core business, the tracking tools are far more developed, feature-rich, intuitive, and powerful.
  • No deliverability assistance.

• Best For: Users focused on tracking who may also, from time to time, send mail merge campaigns.

Check out Mailsuite.

Best Mail Merge for Gmail: Next Steps

Once more, your top options for sending a mail merge in Gmail are:

1. GMass – best overall (mail merge features and beyond, deliverability, breaking limits)
2. Gmail’s built-in merge – best for simple, one-off campaigns
3. YAMM – best cheap option
4. Mailmeteor – best for Outlook users
5. Mail Merge with Attachments – best for simple merges
6. Streak CRM – best when you need a CRM in Gmail
7. Mergo – best ultra cheap option with automation
8. Mailsuite – best for tracking-first emailers

One more thing about GMass: While it’s a mail merge tool, it’s also the only tool that’s also built for:

• Cold outreach campaigns
• Email marketing like newsletters and promos
• Even sending every single email

And you can try it completely free — no credit card required.

Just install the Chrome extension and you’ll be up and running. You can try out all the mail merge features during your free trial (though there is a 50 emails/day limit during the trial).

Join the almost 400,000 others using GMass — and find out why it has a 4.8 out of 5 star rating across 10,000+ reviews.