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GMass

Email Marketing Free · from $25/mo

About GMass

GMass turns your Gmail into a full email marketing tool. Write a campaign in a new compose window, tag recipients with a label, and GMass sends personalized emails with mail merge fields, follow-ups, and analytics—all without leaving Gmail.

What it does

It's a Chrome extension that adds a 'GMass' button to Gmail. You draft an email, select a label or spreadsheet, and it sends individually personalized messages. It handles automatic follow-ups, bounce detection, and reply tracking. No separate dashboard needed.

Best for

  • Salespeople doing cold outreach from their Gmail
  • Recruiters sending bulk personalized emails
  • Small businesses running email campaigns without a dedicated ESP

Strengths

  • Works inside Gmail—zero learning curve
  • Automatic follow-up sequences without manual resends
  • Built-in A/B testing for subject lines and content

Key features

  • Mail Merge — Personalize name, company, and custom fields in bulk
  • Auto Follow-Ups — Schedule reminders for non-replies
  • Reply Tracking — See who opened and clicked
  • Bounce Detection — Automatically remove invalid addresses
  • A/B Testing — Test subject lines or body variations
  • Campaign Analytics — Open, click, and reply rates per campaign
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