04/06/21 - Introducing our free email warm-up tool for cold emailers 03/25/21 - GMass now has an API 02/11/21 - Introducing our Email Deliverability Wizard -- make better decisions with your campaigns 01/19/21 - For 2021, new ways to bypass Gmail's limits 12/14/20 - New Feature! Hyper personalize with conditional content 12/07/20 - Our free email verification service is back! ×

A mass email
service inside
Gmail

Get the highest open rates you've ever seen.

Add to Gmail GMass requires Chrome

5-star reviews from 200,000+ happy users

Intro

Used by employees of:

  • Uber
  • Twitter
  • Linkedin
  • Google

What can GMass do?

  • Send cold emails with sequences that maximize responses

  • Pull from Google Sheets, not CSV files.

  • Personalize. Schedule. Track opens, clicks, replies

  • Send mail merge campaigns with automatic follow-ups

  • Send emails as replies to the last thread with each person.

  • Validate your list with our built-in verifier to maximize deliverability

Mail merge with Google Sheets

Say goodbye to CSV files. Connect to Google Sheets to send a personalized mass email using any of the columns in your spreadsheet.

Preview

Mass email based on search results

Use Gmail's powerful search feature to find messages containing recipients to whom you want to email. Then click the Build Email List button, and a Compose window will load containing the email addresses found in those messages. The only mass email service that does this!

Preview

Send campaign as replies

Have emails sent as new messages or as replies to the last conversation with each recipient. Sending a campaign "as a reply" results in higher engagement because it becomes part of an existing conversation rather than a new one.

Preview

Try GMass today!

3 seconds to install!

Add to Gmail GMass requires Chrome

Features

Personalization
Personalization

Personalize to your heart's content. Connect to a Google Sheet and personalize with any column, or use basic first and last name personalization without a spreadsheet. Use fallback values. Don't know someone's first name? We'll auto-detect it.

Complete Personalization Guide
Reports
Analytics

Campaign level reports that show how many people opened, clicked, replied, and bounced. See reports inside Gmail on your desktop or the Gmail app on your phone.

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Scheduling
Scheduling

Schedule a mail merge for any time in the future, or set it to repeat daily or hourly.

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Break Gmail's Sending Limits
Break Gmail's Sending Limits

Send large email campaigns and break Gmail's sending limits, using our distribution technology. GMass will distribute large campaigns over multiple days or send them via an external SMTP service like SendGrid.

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Automatic Follow-up Emails
Automatic Follow-up Emails

Sending cold email? Set automatic follow-up emails to send in a sequence until your recipient replies. The best way to boost response rates.

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Google Sheets Integration
Google Sheets Integration

GMass will read data live from any Google Sheet and even monitor for new rows and then send emails automatically.

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Manual Follow-up Campaigns
Behavior-based Campaigns

Send to a segment of a prior campaign, like everyone who opened the last campaign, or everyone who didn't click the last campaign.

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Reply Management
Reply Management

Emails received in response to a mass email, including replies and bounces, are automatically categorized for you, preventing Inbox clutter.

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Email List Builder
Email List Builder

Find email addresses deep inside your Gmail account just by searching.

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