Inbox Zero

Inbox Zero helps people with busy inboxes sort incoming mail and prepare replies. It works alongside your existing email client and supports Gmail, Google Workspace and Microsoft Outlook.

• Sorting and rules: Automatically label messages with built-in or custom categories, and describe how the assistant should handle mail in plain English.
• Reply drafts and tracking: Prepare replies using your email history and calendar, with CRM context when connected, and track conversations that need your response or await someone else's.
• Inbox cleanup: Unsubscribe from unread subscriptions, archive older mail in bulk and block cold emails; analytics show frequent senders and recurring clutter.
• Meeting and attachment support: Get meeting briefings based on email and calendar context, and automatically file attachments in Google Drive or OneDrive.
• Access across apps: Read mail, draft responses and manage the assistant through the web, iOS and Android apps, Slack or Telegram.

You can run the application on your own server with Docker or use the paid hosted service. Both connect to Google or Microsoft email accounts. Self-hosting controls where the application runs; the connected email and storage services remain external. Inbox Zero states that it doesn't use your data for AI training.