Send mass personalized emails. Get more Opens & Responses thanks to ChatGPT AI.
Listing updated:April 26, 2024
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Works with:
✔️ 1st mail merge using AI (openAI / ChatGPT) to enhance your email subject and content. ✔️ Automatically checks if your recipients opened / clicked / responded to your email. ✔️ Automated follow-ups in the same email thread to boost engagement. ✔️ Works in Gmail and Google Sheets. ✔️ Also works with recipients in Microsoft Excel and CSV files. ✔️ Can use Google Docs to write beautiful newsletters.
👇 Read more about pricing, quota, features, support,...

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With Gmail™ you can manually send hundreds of emails to different recipients. 
If you need to send a similar email to many recipients, Mergo can automate that task. 
You write your message, as usual, in a Gmail™ draft, you provide the list of recipients and Mergo sends your message to all of them.

➤ Freemium: first campaign 100% free, then free for up to 30 emails / campaign.
➤ Plans start at $1.5 / month. 
➤ Monthly, yearly & lifetime plans available.
➤ Team plans available for Google Workspace domains.

➤ If you want to send personalized emails, use Mergo in Google Sheets (mail merge)
➤ If you simply want to send the same email to several people individually and track them, simply open Mergo in Gmail™ (email campaigns)
➤ If you want to write your email template with a powerful text editor, use Mergo in Google Docs (newsletters)

1️⃣ Create a new draft in Gmail™, optionally add merge fields like {{First Name}} to personalize your email
2️⃣ Open Mergo, select your list of recipients (list of email addresses in a Google Sheets, a CSV, an Excel, your Google Contacts, a raw list to copy-paste,...) 
3️⃣ Click Send: Mergo will automatically send your message to each recipients and track your email campaign (opens, clicks, bounces, replies, unsubscribes)

➤ Send emails in bulk in no time to hundreds of recipients
➤ Personalize your email using merge fields like {{First Name}} in your Gmail™ template and/or subject line, and add “First Name” as a column header in your Google Sheets. Mergo will then automatically retrieve the names from this column, and merge them row by row into your emails sent
➤ Send a test email to yourself so you can preview it: Check your email formatting, links, images etc. and make it look perfect before sending it to your recipient list
➤ Automatically import your contacts from Google Contacts and choose the group you want to import
➤ Track all email opens, clicks, responses, bounces, unsubscribes in real time directly from your Google Sheets, so you’ll know what to send them next and increase your customer engagement
➤ Add an unsubscribe link to your mail to keep your database always updated and GDPR compliant
➤ Add CC and/or BCC recipients to each email
➤ Add emojis to your subject line and/or body content for a better eye-catching effect
➤ Send mail merges with personalized attachments to each recipient 
➤ Send emails from a different email address that has been previously set up as alias in Gmail™
➤ Specify a different reply-to so you don’t miss any responses
➤ Turn Google Docs into Gmail™ drafts
➤ Send a campaign from Gmail™, Google Sheets or Google Docs, track result anywhere
➤ Schedule your mail merge at a specific date and time to send well-targeted emails at the right moment 
➤ Send an email when a new row is added to your Sheets, for example with a Zapier integration
➤ Send recursive emails, weekly or monthly
➤  Send follow-up emails inside the same email thread

Mergo uses ChatGPT to check the subject of your email campaign and tells you if it should be improved to boost your chances of getting your emails opened.
It automatically suggests 3 new subjects that could perform better.
After sending your email campaign, Mergo automatically suggests content for follow-up emails to boost engagement / response rate.

Need additional help to write the content of your campaign?
You can use ChatGPT or to create effective marketing messages that grab your audience's attention and drive them to take action.
Those tools can help with grammar and spelling, so your emails will be error-free and professional. They can also write entire emails based on a few keywords.
Simply open ChatGPT, ask it to write your email and copy paste the content into a Gmail draft. You can even indicate that you are running a mail merge campaign and give it merge tags to include in the draft.
Most of your data never leaves your Google account (your list of recipients stay in your spreadsheets, your email content stays in Gmail™). 
Please read the Data Access & Data Storage sections of our Privacy Policy to learn more.
We also go through a security assessment once a year (by firms like Bishopfox and NCC Group). 
This assessment helps keep Google users’ data safe by verifying that Mergo demonstrates capability in handling data securely and deleting user data upon user request.

🤔 Why use Mergo instead of its competitors?
Many apps are available on the Google Workspace Marketplace to send email campaigns. 
Mergo is the first one entirely built on the new generation of Google add-ons: all the code running in your web browser is served and secured by Google (no custom HTML or Javascript with potential security threat, no hack of the Gmail™ user interface like Gmass does).
Some, like Mailmeteor, are not as integrated as Mergo with Gmail™. They can’t use Gmail™ drafts, can’t track responses and can’t perform follow-ups in the same email threads.

Not convinced yet? Here are a few examples of email campaigns you can send with Mergo:
➤ Lead generation campaigns: Import contacts from your Google Contacts or from your preferred CRM in a .CSV format file (Salesforce, HubSpot, Copper …) into your Google Sheets. Use Mergo to send well-targeted emails to your prospects, so you don’t miss any potential customers!
➤ Sales prospecting emails: Account managers will love the simplicity of Mergo to send personalized emails to their target and easily manage their portfolio of clients. It’s much easier to use than Salesforce List Emails, Pardot, HubSpot, MailChimp, SendGrid, GetResponse or MailerLite.
➤ Event invitations: Make sure your guests get the right invitation at the right time using Mergo’s personalized attachments and scheduling features. Send invitations to corporate events, weddings, meet-ups, product launch events, seminars, festivals, fairs, job-datings and more!
➤ Promotions: Discounts can be a very powerful customer acquisition and retention tool, so you don’t want to miss this opportunity! Send coupons and discounts during summer/winter sales, Black Fridays, first-time purchases ...
➤ Newsletters / Marketing campaigns: Send regular newsletters on your product and services, and track who opened, clicked and responded to your emails. Remove bounces from your list, and improve your next campaign to increase customer engagement.
➤ Customer satisfaction surveys: Improve your business and processes by getting meaningful feedback from your customers.
➤ Internal communications: Streamline all your communications between managers and employees, HR and teams, administration and parents, teachers and students ... Add the relevant people as CC or BCC recipients to your email so nobody misses important information.
➤ Greetings emails: Send Christmas wishes, Happy New Year, Thanksgiving, holiday greetings, birth announcements, thank-you emails etc. to your friends, family, colleagues, associations’ members ...
➤ Media campaigns: Send a PR campaign to journalists, bloggers, influencers to raise awareness on your product.
➤ Reminder campaigns: Send a monthly reminder to your employees to ask them to register their expenses in your CRM solution.

🆕 RELEASE NOTES (not 100% up to date, sorry! 🙇):
📅 2022
January: Mergo automatically adjusts the delivery speed to increase deliverability (it can take more time to send your campaign but you are less likely to end up in spam)

📅 2021
November: Added a domain template gallery to share email templates with your colleagues
September: Automatically send follow-up emails to recipient who did not respond, inside the same email thread
July: Import your recipients from a Microsoft Excel or CSV file
June: Send email campaigns directly from Gmail™ and from Google Docs
May: Added ability to repeat a campaign every week / month / year (to send a reminder, happy birthday,...)
April: Compatibility with Zapier and similar tools: send a mail when a new row is added to your spreadsheet
March: Turn Google Docs into Gmail™ drafts
February: Daily quotas are now up to 500 for Gmail™ accounts, and 2000 for Google Workspace accounts
January: Pause or Abort an ongoing campaign

📅 2020
December: HUGE! Mergo UI has been entirely rebuilt and is now part of the latest generation of Google Workspace add-ons (using the CardService for improved security and integration into Google Workspace)
October: New scheduling option: "row by row", to send each row at a specific time
September: Emojis are now supported in both subject lines and body content
August: You can now add a link to let your recipients unsubscribe from your campaigns
July: Added scheduling options to send your campaign on a specific date / time
June: Added tracking feature: Open rate, click rate, response rate
May: Creation of Mergo: Send mass emails from Gmail™ and Google Sheets, email personalization option, cc/bcc recipients, import from Google Contacts, personalized attachments

If you like Mergo, please support us by giving us a 5-star rate or leaving a short review on this page! You may also want to try our other apps like Folgo ( and Publigo (

Mergo was created by Romain Vialard, Scriptit. 
Romain is also the creator of Yet Another Mail Merge (YAMM), Awesome Table & Form Publisher. He is not involved in those products anymore (they are now maintained by Talarian).
Romain is a member of the Google Developer Expert (GDE) program and has been working on Google Apps Script and Google APIs for more than 10 years.
Additional information
PricingFree of charge with paid features
Privacy policy
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Mergo mail merge will ask for the permissions shown below. Learn more
Mergo mail merge will need access to your Google account
This will allow Mergo mail merge to :
See, edit, create, and delete all your Google Docs documents
See, edit, create, and delete only the specific Google Drive files you use with this app
See and download all your Google Drive files
See, edit, create, and delete all your Google Sheets spreadsheets
Run as a Gmail add-on
Manage drafts and send emails
Read, compose, and send emails from your Gmail account
View your email messages and settings
Manage your sensitive mail settings, including who can manage your mail
See, edit, download, and permanently delete your contacts
Display and run third-party web content in prompts and sidebars inside Google applications
Connect to an external service
Allow this application to run when you are not present
Send email as you
View your country, language, and timezone
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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