GMass vs Mailbutler
A factual comparison of features, pricing, and capabilities.
GMass
Gmail-based mass email and mail merge platform with unlimited emails, campaigns, and contacts directly inside Gmail.
Mailbutler
Mailbutler is an email extension for Gmail, Apple Mail and Outlook that adds email tracking, message templates, mail merge, smart follow-ups, AI compose, signatures, notes and tasks and team collaboration. Plans are per user per month billed in USD or EUR, with a free Starter plan.
Pricing comparison.
Monthly rates shown. Annual billing may offer discounts. Visit official sites for current pricing.
Feature comparison.
| Feature | GMass | Mailbutler |
|---|---|---|
| Works inside Gmail | ||
| Unlimited emails, contacts, and campaigns | ||
| Mail merge personalization | ||
| Free email verification | ||
| Automated follow-up sequences | ||
| A/B testing | ||
| Spam Solver deliverability tool | ||
| Custom tracking links | ||
| Inbox rotation | ||
| API and Zapier access | ||
| Email tracking with real-time notifications | ||
| Message templates | ||
| Mail merge | ||
| Smart follow-ups | ||
| Smart compose and smart improve (AI) | ||
| Smart timing | ||
| Email assignments and collaborator status | ||
| Notes and tasks | ||
| Automations | ||
| Signature marketing |
Native integrations.
GMass
Mailbutler
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Information gathered from official sources and may change. Pricing and features last verified 9/4/2026. Please visit the official websites for the most current information.