Gmass
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Your product? Claim it to see where they come fromAbout Gmass
GMass is an email campaign tool that works inside Gmail, delivered as a Chrome extension. It sends newsletters, announcements, cold email campaigns and transactional email from a Gmail account, with mail merge personalization, conditional logic, scheduling, automatic follow-up sequences, A/B testing and campaign analytics covering opens, clicks and replies.
For larger sends, GMass moves delivery from native Gmail to inbox rotation across multiple mailboxes and to SMTP servers, including its own ColdSMTP server and third-party SMTP. It can read merge fields from Google Sheets and auto-send to new rows, verify addresses before sending, manage unsubscribes and bounces across a team, and use AI to write campaigns, generate spintax and suggest spam fixes. A REST API, webhooks and Zapier connect it to other apps, and free tools test SPF, DKIM, DMARC, links and inbox placement.
The site states that more than 400,000 people use GMass, and lists use cases ranging from cold outreach, link building and recruiting to teachers, churches, HOAs, sports clubs and real estate marketing.
Best for
- Sales teams running cold email from Gmail
- Marketers sending newsletters via Gmail
- Teachers, clubs and organizations emailing members
- Developers sending transactional email over SMTP
Pros
- Runs directly inside Gmail with no separate platform to learn
- Inbox rotation and SMTP options for sends beyond Gmail limits
- Google Sheets integration with live data and auto-send to new rows
- Unlimited automatic follow-up stages and A/B testing
Cons
- Built around Gmail; designed for use from a Gmail account
- Pricing details are not shown in the provided page text
Gmass FAQ
- Does GMass work outside Gmail?
- GMass is a Chrome extension that sends campaigns from inside Gmail, and it also offers an SMTP service that apps can use for transactional email.
- What happens when I hit Gmail's sending limit?
- GMass can reroute the campaign through its high-performance SMTP or third-party SMTP, and it offers inbox rotation across multiple mailboxes.
- Can it use data from Google Sheets?
- Yes. It reads merge fields from Google Sheets, picks up the latest Sheet data before sending and can auto-send emails to new rows.
- Does it integrate with other apps?
- Yes, through a REST API, webhooks or Zapier.
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