Mailbutler

Mailbutler is an email productivity add-on built into Apple Mail, Gmail, and Microsoft Outlook, with its Smart Assistant feature adding AI-generated email support directly inside the inbox. The assistant uses OpenAI's GPT-4o to draft new emails from a short list of keywords, generate replies to incoming messages, summarize long email threads, and clean up spelling and grammar. Users can tune the tone, format, length, style, and language of any AI output, so the same feature works differently for a quick internal note versus a formal client reply. A companion Task Finder scans messages and pulls out action items that can be pushed straight into Mailbutler's own task list. Beyond the AI layer, Mailbutler wraps in more traditional email productivity tools: read/link tracking, scheduled sending, signature templates with marketing blocks, mail merge for bulk personalized sends, and automated follow-up reminders when a recipient hasn't replied. It positions itself as GDPR compliant, running on EU-based servers and stating it does not share user data with third parties. The product is aimed at professionals and small teams who want AI help without switching away from their existing mail client. The company, Mailbutler GmbH, offers a 14-day free trial, but Smart Assistant itself is locked behind the paid Smart or Business subscription tiers rather than being available on the free plan.