GMass
GMass is a powerful email marketing and cold email solution that works directly inside your Gmail account to help you send mass campaigns and automated follow-ups easily.
Mailbutler
Mailbutler is an email productivity extension for Apple Mail, Gmail, and Outlook that provides tracking, scheduling, and signature management to help you handle your inbox more effectively.
Quick Comparison
| Feature | GMass | Mailbutler |
|---|---|---|
| Website | gmass.co | mailbutler.io |
| Pricing Model | Freemium | Freemium |
| Starting Price | Free | Free |
| FREE Trial | ✘ No free trial | ✓ 14 days free trial |
| Free Plan | ✓ Has free plan | ✓ Has free plan |
| Product Demo | ✓ Request demo here | ✘ No product demo |
| Deployment | ||
| Integrations | ||
| Target Users | ||
| Target Industries | ||
| Customer Count | 0 | 0 |
| Founded Year | 2015 | 2015 |
| Headquarters | Chicago, USA | Berlin, Germany |
Overview
GMass
GMass turns your regular Gmail or Google Workspace account into a full-featured email marketing platform. You can send mass emails, create complex mail merges using Google Sheets data, and schedule automated follow-up sequences that stop once a recipient replies. It lives entirely inside your Gmail interface, so you don't have to learn a new dashboard or export your contacts to external software.
You can use it to bypass Gmail's sending limits by connecting to external SMTP services or stay within standard limits for smaller outreach. It solves the problem of low engagement by making every mass email look like a personal, one-on-one message. Whether you are a recruiter, salesperson, or non-profit organizer, you can manage your entire outreach strategy without ever leaving your inbox.
Mailbutler
Mailbutler is an email extension that integrates directly into your existing inbox to help you manage communication more professionally. Instead of switching between different apps, you get advanced features like email tracking, send later, and professional signatures right inside Apple Mail, Gmail, or Outlook. It helps you stay organized by allowing you to attach private notes and tasks to specific emails so you never lose track of important follow-ups.
You can also use the built-in AI assistant to draft emails, summarize long threads, and improve your writing style instantly. The software is designed for freelancers, sales professionals, and small teams who need to maintain a high level of email productivity without leaving their preferred email client. It offers a 14-day free trial and a permanent free plan for basic needs.
Overview
GMass Features
- Google Sheets Integration Connect your spreadsheets directly to Gmail to personalize every email with custom data fields from your rows.
- Automated Follow-ups Set up a sequence of emails that send automatically until your recipient replies, clicks, or opens your message.
- Email Reporting Track opens, clicks, and replies in real-time with detailed analytics reports generated right inside your Gmail account.
- Behavior-based Campaigns Send new emails specifically to people who opened or clicked your previous messages to maximize your conversion rates.
- Scheduling Draft your emails now and schedule them to go out at the exact time your prospects are most active.
- List Segmentation Filter your mailing lists based on past engagement to ensure you only message the most relevant contacts.
Mailbutler Features
- Email Tracking. See exactly when and where your emails were opened and which links were clicked to time your follow-ups perfectly.
- Smart Send Later. Schedule your emails to be sent at specific times so they land at the top of your recipient's inbox.
- Professional Signatures. Create and manage beautiful, branded email signatures with ease to maintain a consistent professional image for your brand.
- Email AI Assistant. Draft replies, summarize long conversations, and fix spelling or grammar errors automatically using integrated artificial intelligence.
- Notes and Tasks. Attach private notes and actionable tasks directly to your emails so you remember every important detail and deadline.
- Message Templates. Save your most-used messages as templates to send personalized responses in seconds rather than typing them repeatedly.
Pricing Comparison
GMass Pricing
- Up to 50 emails per day
- All standard features included
- Gmail-based sending
- Basic campaign tracking
- GMass branding on emails
- Everything in Free, plus:
- Unlimited email sending
- No GMass branding
- Basic mail merge features
- Address verification tool
- Email support
Mailbutler Pricing
- Basic email tracking
- Limited AI Assistant usage
- Email signatures
- Undo send functionality
- Attachment reminders
- Everything in Free, plus:
- Unlimited email tracking
- Real-time open notifications
- Link tracking details
- Tracking details dashboard
- Mobile app integration
Pros & Cons
GMass
Pros
- No new software to learn since it lives in Gmail
- Powerful Google Sheets integration for easy personalization
- Reliable automated follow-up sequences increase reply rates
- High deliverability by using Google's own mail servers
- Simple setup process takes less than a minute
Cons
- Requires Google Chrome to use the browser extension
- Interface can feel cluttered inside the Gmail window
- Daily sending limits are tied to Google's restrictions
Mailbutler
Pros
- Integrates directly into your existing email client
- Excellent tracking accuracy for opens and clicks
- Very easy to set up and use immediately
- Professional signature templates look great on all devices
Cons
- Requires a browser or mail extension to function
- AI features require a higher-tier paid subscription
- Mobile functionality is more limited than desktop version