Mergo
Mergo is a Google Sheets and Gmail mail merge add-on for sending personalized email campaigns.
What Mergo is
Mergo is a Google Sheets and Gmail mail merge add-on for sending personalized email campaigns. It can insert details such as a recipient's first name or company name and attach personalized files. Campaign tools include recipient segmentation, email previews, CC/BCC, Gmail aliases, and unsubscribe links. Mergo tracks opens, clicks, replies, bounces, and unsubscribes, and supports scheduled campaigns, automated follow-ups, and messages triggered by Google Forms submissions. It works with Gmail and Google Sheets, with features also drawing on Google Docs, Drive, Contacts, and Forms. Mergo says email content and campaign sheet data stay in the user's Google account, though limited service data may be stored in Firebase on Google infrastructure. Its free plan includes a first campaign at no cost, then allows up to 30 emails per campaign. Support is by email, with free-period support provided on a best-effort basis. Mergo says users can request deletion of Firebase database data, processed within 30 days. It also says it responds to vulnerability reports within 72 hours and proceeds to a patch within 30 days.
Good
- Personalizes email fields and attachments.
- Tracks opens, clicks, replies, bounces, and unsubscribes.
- Supports scheduled campaigns and automated follow-ups.
- Forms submissions can trigger personalized emails.
- Campaign data stays in the user's Google account.
Watch out
- Free plan limits later campaigns to 30 emails.
- Free-period support is best-effort by email.
- Some service data may be stored in Firebase.
Who it suits
Mergo suits Gmail and Google Sheets users who want to personalize campaign emails and automate follow-ups. It may fit smaller campaigns that can work within the free plan's 30-email campaign limit after the first campaign.
Verdict
Mergo adds personalization, tracking, and follow-up automation to Gmail and Google Sheets campaigns. Its free plan covers the first campaign, then limits campaigns to up to 30 emails.
Plans and prices
From Mergo's own pricing page, checked 5 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free plan | Free | First campaign free · then up to 30 emails per campaign |
The facts
Each one read from Mergo's own pages, with the date it was checked.
What it does
- Automation
- It supports scheduled campaigns, automated follow-ups, and personalized emails triggered by Google Forms submissions.checked 5 Oct 2026
- Campaign tracking
- It tracks opens, clicks, replies, bounces, and unsubscribes.checked 5 Oct 2026
- Creator
- Mergo was created by Romain Vialard, founder of Scriptit and a Google Developer Expert program member.checked 5 Oct 2026
- Daily sending capacity
- Mergo says campaigns can send up to 2,000 emails per day.checked 5 Oct 2026
- Data deletion
- Users can request deletion of data in Mergo’s Firebase database, which the privacy policy says will be processed within 30 days.checked 5 Oct 2026
- Data handling
- Mergo says email content and campaign sheet data stay in the user’s Google account, while limited service data may be stored in Firebase on Google infrastructure.checked 5 Oct 2026
- Integrations
- Mergo works with Gmail and Google Sheets, and its features also use Google Docs, Drive, Contacts, and Forms.checked 5 Oct 2026
- Other campaign tools
- Features include recipient list segmentation, CC/BCC, Gmail aliases, email previews, and unsubscribe links.checked 5 Oct 2026
- Personalization
- It supports merge fields such as recipient first name and company, plus personalized attachments.checked 5 Oct 2026
- Purpose
- Mergo is a Google Sheets and Gmail mail merge add-on for sending personalized email campaigns.checked 5 Oct 2026
- Security review
- Mergo’s Data Policy FAQ says it underwent an external security company audit in addition to Google’s audit.checked 5 Oct 2026
- Support
- Mergo provides support by email and says free-period support is provided on a best-effort basis.checked 5 Oct 2026
- Vulnerability reporting
- Mergo says it will respond to vulnerability reports within 72 hours and proceed to a patch within 30 days.checked 5 Oct 2026
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