Mailmeteor
Mail merge in Gmail and Google Sheets: personalised emails sent from your own Gmail account, scheduling and open tracking. Free plan (500 emails a month, 50 a day); Starter at $5.99 per user per month (5,000 a month, 250 a day), Premium at $17.99 (30,000 a month), Professional at $35.99. Prices shown in dollars by default.
Sending a personalised email to each row of a spreadsheet is a script of a few dozen lines with Google Apps Script, inside your own account. Open tracking and scheduling are easy to add. Respect Gmail's daily sending limits and only contact people who have agreed or who have a legitimate interest: the risk is not technical, it is regulatory. For large volumes, a dedicated sending tool is more suitable.
What you lose
- The writing interface inside Gmail.
- Open and click tracking with no setup.
- Scheduling of sends and follow-ups.
- Management of unsubscribes.
Existing alternatives to Mailmeteor
- ListmonkOpen source
Mature open-source newsletter and mailing-list manager.
What a home-built tool costs once it exists
- Hosting and database: a server cost, and automatic backups you actually test.
- Security and GDPR: dependency updates, an HTTPS certificate, protection of your customers’ data.
- Upkeep time: who fixes the tool on a Saturday night in the middle of service if the server goes down?
The prompt to build it yourself
Build a mail-merge script from a Google Sheets sheet, replacing a Gmail mail-merge tool.
Context: I write to about 150 business contacts a month from my Gmail account.
To do:
- A Google Apps Script bound to the sheet: columns email, first name, company, status.
- An email template with {{first_name}} and {{company}} variables, stored in the sheet.
- A «Send» menu that only writes to rows with status «to send», with a maximum of 50 emails a day and a random delay between sends.
- Switching the status to «sent» with the date, and honouring an «unsubscribed» column that blocks any send.
- An unsubscribe link in every email.
Out of scope: open tracking, automatic follow-ups.
README: installing the script, Gmail's sending limits, and a reminder to write only to people with a legal basis (consent or legitimate interest).Frequently asked questions
- How much does Mailmeteor cost, and what do you really pay for?
- Listed price: free (paid plans from €5.34/month). What the subscription covers and is hard to maintain yourself: The writing interface inside Gmail.; Open and click tracking with no setup.; Scheduling of sends and follow-ups.; Management of unsubscribes..
- What free or open-source alternatives to Mailmeteor exist?
- Listmonk (open source). Options to compare before committing to a custom build.
- Where do you start to build an equivalent of Mailmeteor?
- Copy this page’s prompt into Claude, Codex or Cursor to get a first prototype. Then plan for hosting, data backups and GDPR compliance: that is what costs the most to maintain over time.
How are our verdicts established? Read our detailed methodology ↗
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