Mergeline and YAMM both send personal emails from your Gmail. YAMM works inside Google Sheets, tracks opens on every plan and costs $72 a year on gmail.com accounts. Mergeline works inside Gmail, sends 60 a day free against YAMM’s 20, adds automatic follow-ups, and asks for no Google account permissions by default.
| Mergeline | YAMM | |
|---|---|---|
| What it is | Chrome extension that sends through your own Gmail tab | Google Workspace add-on for Sheets and Gmail, by Talarian |
| Free plan | 60 emails a day, no time limit, no branding added | 20 recipients a day for 1 user1 |
| Monthly billing | Pro $12 a month | Not published |
| Yearly billing | Pro $99 a year (about $8.25 a month) | Pro for gmail.com $72 a year; Pro for Google Workspace $144 a year1 |
| Daily sending | Free 60; Pro up to Gmail’s own daily limit | Free 20; Pro gmail.com 400; Pro Workspace 1,500 (400 on new Workspace accounts)1 |
| Follow-ups | Up to 7 on Pro, in the same thread, stopping for anyone who replies | Follow-up campaigns to filtered recipients on every plan. Automatic stop-on-reply sequences: not published1 |
| Tracking pixels | None added: no tracking pixels and no link redirects | Open, click and response tracking on every plan, including free1 |
| Where your data lives | In your browser. No Mergeline server receives your lists, emails or replies | Uses Firebase as an external service; its policy says it uses message bodies, attachments, metadata, headers and settings2 |
| Google permissions | No Google account permissions by default. Optional Google sign-in asks for gmail.send, plus gmail.readonly only if you turn on reply detection | Read, compose and send email; see, edit, create and delete all your Google Sheets; contacts; run when you are not present3 |
| Attachments | Yes, on Pro | Not published |
| Scheduling | Yes, on Pro: start time and sending hours | Not published |
| A/B tests | Yes, on Pro: two subject lines | Not published |
| Google Sheets | Yes: paste a Sheets link. Pro adds new rows automatically | Yes, it runs inside Google Sheets |
YAMM is a Google Workspace add-on that sends to the rows of a Google Sheet, with access to your Gmail and your Sheets3. It also asks for permission to run when you are not present3, so it can keep working without you.
Mergeline is a Chrome extension that works in Gmail: a side panel for campaigns and a button next to Send for quick merges. Your list can come from a Google Sheet, but also from pasted addresses, a CSV or Excel file, or a Gmail search. It sends from your Gmail tab, so your browser needs to stay open while a campaign runs.
YAMM shows its prices as a monthly figure billed yearly: Pro for a gmail.com account is $72 a year and Pro for Google Workspace $144 a year1. Monthly billing prices were not published on the pricing view we read.
Mergeline Pro is $12 a month or $99 a year for any Gmail or Workspace account. On a gmail.com account YAMM is $27 a year cheaper; on Workspace, Mergeline is $45 a year cheaper and includes automatic follow-ups.
For free use, Mergeline sends 60 emails a day and YAMM 20 recipients a day1.
YAMM’s help page lists its permissions: read, compose and send email; see, edit, create and delete all your Google Sheets; contacts; an external service (Firebase); and running when you are not present3. Its privacy policy says it uses message bodies, attachments, metadata, headers and settings to provide the service2.
Mergeline stores your lists, emails, results and do-not-email list in your browser’s extension storage. In its default mode it asks for no Google account permissions: it fills Gmail’s own compose window in your Gmail tab. If you choose Google sign-in instead, it asks for gmail.send, which Google classes as sensitive rather than restricted, and for gmail.readonly only if you turn on reply detection4. That data is used in your browser and never sent to a Mergeline server. The full breakdown is on our security page.
Still deciding? See the best YAMM alternatives, or compare every tool’s price on the mail merge pricing page.
Mergeline: 60 emails a day on the free plan. YAMM’s free plan allows 20 recipients a day1.
Yes. Its help page lists permission to see, edit, create and delete all your Google Sheets3. Mergeline reads a sheet only when you paste its link, and asks for no edit access.
On a gmail.com account YAMM Pro is cheaper at $72 a year. On Google Workspace YAMM Pro is $144 a year1 and Mergeline Pro $99.
YAMM lists follow-up campaigns to filtered recipients on every plan1. Automatic stop-on-reply sequences were not published on its pricing page.
No. Mergeline works in Gmail. Paste a Google Sheets link and its rows become your list.
60 emails a day free, with no card and no branding. Pro is $12 a month or $99 a year, with up to 7 follow-ups that stop on reply.
Add to ChromeGmail is a trademark of Google LLC. Yet Another Mail Merge (YAMM) is a trademark of its owner. Mergeline is not affiliated with, endorsed by or sponsored by Google or any other company named on this page.
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