4.9/ 5
Across 142 reviews from 19,000+ installs on the Google Workspace Marketplace.
Send-only Gmail access. We never read your inbox.
Mail merge for cold email
Outreach that lands like a one-to-one email, because it is one. Personalized from your Google Sheet, paced to protect your Gmail account, and tracked so you know who to follow up with.
Free plan: 50 emails a day, no credit card. Works with Gmail and Google Workspace.
Cold email works when it reaches the inbox and reads like a real, personal message. BetterMerge sends each email in your campaign individually through your own Gmail account and personalizes every subject line and opening line from your Google Sheet. You control the pace, so you never send too much too fast, and open and click tracking shows which prospects are warm.
Sound familiar?
- Outreach flagged as promotional because it came from a marketing platform
- Generic emails that get ignored, or reported as spam
- Burning your sender reputation by sending too much, too fast
- Chasing every prospect because you cannot see who engaged
Outreach that protects your reputation
Personal at scale
Merge any column into the subject or body: first name, company, role, or a custom first line you wrote for each prospect. Every email sounds like it was written for one person.
- Custom first lines and subject lines per prospect
- Your saved signature added automatically
- AI assistant to review your copy for spam risk (beta)
Paced to protect your account
Sending hundreds of emails in one burst is how Gmail accounts get flagged. Delivery automation spreads your campaign across the hours and days you choose.
- Sending days and time windowsPlus+
- Gaps between emailsPlus+
- A daily cap below your plan's quotaPlus+
- Send from aliases or extra Google accountsPlus+
Follow up with the warm ones
See who opened and clicked on every plan. Then send a follow-up only to prospects who engaged, or only to those who did not.
- Open and click tracking, even on the free plan
- Follow-ups by opened, clicked, or neitherLite+
- Reply detection and same-thread follow-upsPlus+
Also included
Email verification
ProChecks each address before sending and skips confirmed-invalid ones, so fewer emails bounce.
Unsubscribe link in every email
Opt-outs are honored automatically across all your campaigns, which keeps you on the right side of anti-spam rules.
Your inbox stays private
BetterMerge only has permission to send. It cannot read your conversations with prospects.
Free spam checker
Test your subject line and copy for spam triggers before you send.
How it works
- 1
Build your prospect list
One row per prospect in Google Sheets, with columns for every detail you want to personalize.
- 2
Write like a person
Plain formatting, short paragraphs, and merge tags where they matter.
- 3
Set a safe pace
Choose sending days, a time window, and a daily cap. Start small on new accounts.
- 4
Track and follow up
Watch opens and clicks, then send a follow-up to the prospects who engaged.
Trusted by 19,000+ Google Workspace users
Rated 4.9 out of 5 across 142 Marketplace reviews.
Read all 142 reviews
"I recommend this app for your mail merge! This tool is very simple, everything is clear for the use. Thanks for this! It's the best app in the Market for me!"
"One of the best mail merge applications I've ever used so far, really a life saver for small businesses like mine."
"Best extension for Mail merging, very fast, functional and affordable…"
Frequently asked questions
Is cold email legal?
In most places, yes, with conditions. Laws like CAN-SPAM in the US and GDPR in the EU require accurate sender details, a way to opt out, and in some regions a legitimate reason to contact the person. BetterMerge adds the unsubscribe handling, but you are responsible for following the laws that apply to your recipients.
How many cold emails can I send per day from Gmail?
Google allows up to 500 recipients a day on @gmail.com accounts and up to 2,000 on Google Workspace. For cold outreach, experienced senders stay well below those caps, especially on newer accounts. Quality and a gradual ramp-up matter more than volume.
Will my cold emails land in spam?
Sending individually from your own Gmail account is one of the most deliverability-friendly ways to do outreach, but results still depend on your domain reputation, list quality, and copy. Set up SPF, DKIM, and DMARC for your domain, warm up new accounts, and test your copy with our free spam checker.
Does BetterMerge do automated follow-up sequences?
Not yet. Today you send follow-ups as separate campaigns aimed at the prospects who opened, clicked, or did not engage. On Plus and Pro, with reply detection set up, you can also exclude people who replied and send the follow-up in the same Gmail thread.
Should I warm up my Gmail account first?
If the account or domain is new, yes. Start with a small daily volume and increase it over a few weeks. Our email warmup guide has a practical schedule.
Related resources
Transform your email campaigns with BetterMerge
Send personalized emails at scale using Gmail and Google Sheets. Track opens, clicks, and manage your campaigns with ease.
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Free plan available
Works with Gmail & Sheets
Track opens & clicks