Mailbutler

What it does

Mailbutler is an extension that adds email productivity tools to Apple Mail, Gmail, or Outlook. It covers email tracking, tailored sending with mail merge, shared inbox collaboration, and signature marketing. A free 14-day trial includes all features, and a free Starter plan is available after the trial.

Mailbutler is an extension for Apple Mail, Gmail, and Outlook. It adds open and click tracking, message templates, mail merge, smart timing, and an AI email assistant. For teams, it brings email assignments, live status indicators, and shared notes and tasks into a shared inbox. Signature marketing lets you add call to action buttons, images, and dynamic content to your email signature. The company states it is ISO/IEC 27001 certified and GDPR compliant, with servers in Frankfurt, Germany. It says it never reads, analyzes, or stores message content or attachments, and only transmits the email body to OpenAI when you use the Smart Assistant feature. A free 14-day trial includes all features and needs no payment details. After the trial, you move to a free Starter plan, where sent emails carry a visible Mailbutler watermark. Paid plans start at $4 per user per month. The homepage does not state whether an API is available or whether the software is open source, so those remain unknown.