08/30/23 - Replies and bounces are now detected INSTANTLY. 07/18/23 - New Feature! Send triggered emails immediately when a prospect is in their Inbox. 06/22/23 - Achieve perfect deliverability with delivery routes. 03/14/23 - We've launched something big. Reply to emails 10x faster. 12/14/22 - Campaign reports now include a new stat: open rates without Apple MPP 11/03/22 - Join our new Facebook group! 10/20/22 - New Feature: GMass will auto-save your campaign as you type 09/20/22 - Apple did it, and now we've done it. An edit button. 08/23/22 - New Feature: Email Polls! 07/18/22 - Introducing multi merge: one campaign, multiple lists, and seamless personalization 06/15/22 - Your campaigns can now include preview text. 03/14/22 - We've invented a way to stop false opens 03/02/22 - You can now see your full email sequence in action before you send 09/22/21 - We've launched a different kind of SMTP service, built on Google ×
show news

Send email campaigns inside Gmail

Get the highest engagement you've ever seen.

Add to Gmail GMass requires Chrome

5-star reviews from 300,000+ happy users

Intro

Used by employees of:

  • Uber
  • Twitter
  • Linkedin
  • Google

What can GMass do?

  • Turn Gmail into an email marketing and cold email platform

  • Use mail merge personalization with Google Sheets

  • Verify your list, test links, & fix spam triggers before you send

  • Maximize your deliverability — hit the inbox, not the spam folder

  • Send automated follow-up sequences

  • Break Gmail’s limits — send virtually unlimited emails

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

Send cold emails in Gmail

The easiest way to send cold email sequences in Gmail.

Preview

Mass Email Service in Gmail

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

We send a lot of email. Watch these live stats grow right before your eyes.

Lifetime emails sent: ...
Emails sent since midnight 12/5/2023: ...
Join the party See more stats

Features

Break Gmail's Sending Limits
Mass Emails in Gmail

Our mass email service can break Gmail's sending limits using our distribution technology.

More details
Google Sheets Integration
Mail Merge with Google Sheets

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

More details
Reports
Email Reporting 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.

More details
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.

More details
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.

More details
Scheduling
Schedule Mass emails and Mail Merges

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

More details
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.

More details
Reply Management
Reply Management

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

More details
Email List Builder
Email List Builder

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

More details
Add GMass Extension to Gmail GMass requires Chrome

Do people love us or hate us?

Most people love GMass. Every now and then, a curmudgeon doesn't. See our thousands of awesome reviews (click the "Reviews" tab). Still not convinced? Here's why GMass is better.

GMass