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GMass

Vendor: GMass

GMass is an email marketing tool that integrates directly with Gmail, enabling personalized mass emails, automated follow-ups, scheduling, tracking, throttling, and SMTP integration for high-volume sending.

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email Businesses and marketers sending personalized mass emails via Gmail High-volume senders needing Gmail limit handling Users wanting email throttling for deliverability Teams requiring automated follow-up sequences #email marketing #gmail integration #mail merge #email automation #deliverability #throttling #smtp integration #email polling

Overview

GMass is an email marketing platform built as a Gmail extension that allows users to send personalized mass emails and manage campaigns without leaving their inbox. It supports mail merge with Google Sheets, automated follow-up sequences, email scheduling, open and click tracking, customizable templates, throttling controls, Gmail limit handling with automatic distributed scheduling, email polling, and SMTP integration for high-volume sending. The tool is designed for businesses, marketers, and individuals who want to run outreach or marketing campaigns directly from Gmail. Pricing includes a free trial and multiple tiers with monthly or annual billing in INR.

Key Features

Mail Merge with Google Sheets

Import recipient lists from Google Sheets to personalize mass emails with dynamic fields, automated daily sends to new rows, filtering, and campaign tracking data written back to sheets.

Automated Follow-Ups

Set up sequences of follow-up emails that send automatically until a response is received, with options for drip campaigns, threaded replies, and re-engagement targeting.

Email Scheduling

Plan and schedule emails to be sent at optimal times for recipient engagement, with ability to edit scheduled campaigns up to the moment before sending.

Open and Click Tracking

Monitor who opens emails and clicks on links to assess campaign effectiveness, with reporting in GMass dashboard and Google Sheets.

Customizable Templates

Create and save email templates for consistent and efficient communication.

Email Throttling

Add configurable delays (5-10 seconds) between individual emails to improve deliverability, avoid flooding recipient servers, and detect Gmail sending limits sooner.

Gmail Limit Handling

Automatic distributed scheduling across multiple days, SMTP rerouting via SendGrid when limits exceeded, and automatic resending of bounced over-limit emails.

Email Polling

Send quick one-question surveys via email and collect results directly in campaign reports without external survey tools.

Advanced Personalization

Personalize with conditional logic (if/then statements), automatic first name detection from email addresses, personalized attachments, and fallback options.

Pros & Strengths

  • ✓
    Seamless Gmail Integration: Direct integration with Gmail allows campaign management within the familiar interface.
  • ✓
    User-Friendly Interface: Intuitive design facilitates ease of use even for beginners.
  • ✓
    Effective Personalization: Mail merge functionality enables effortless personalization of mass emails, enhancing engagement.
  • ✓
    Advanced Deliverability Features: Throttling, automatic limit handling, and SMTP integration improve deliverability for high-volume campaigns.
  • ✓
    Free Trial Available: Users can start a free trial without credit card or sign-up form.

Cons & Tradeoffs

  • ⚠
    Pricing Concerns: Cost is relatively high compared to similar tools, especially for occasional use.
  • ⚠
    Draft Management: After sending campaigns, emails remain in the draft folder until manually removed.
  • ⚠
    SMTP Deliverability Trade-off: Using external SMTP servers may result in slight deliverability decrease compared to Gmail native sending.
  • ⚠
    Additional SMTP Costs: High-volume SMTP sending incurs additional pricing affecting about 5% of users.

Known Limitations

  • • Emails remain in draft folder after sending until manually removed
  • • Higher cost compared to some alternatives for occasional use
  • • Slight deliverability decrease when using external SMTP servers
  • • Additional costs for high-volume SMTP sending
  • • Gmail daily sending limits apply unless using SMTP integration

Pricing & Plans

Model: freemium
INR1200 /month

Free trial available. Paid plans: Standard, Premium, Professional with monthly or annual billing. India pricing in INR: Standard ₹1,200/month (₹11,060/year), Premium ₹2,730/month (₹15,080/year), Professional ₹7,730/month (₹24,100/year). Team plans available with per-user pricing. All plans include unlimited emails. Payment via credit card, Bitcoin, or PayPal.

✓ Free Plan ✓ Free Trial

Pricing verified: 2026-08-20

Editorial Info

Last Reviewed: 2026-08-20

Verified Sources & Research

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