Inbox Zero
An AI email assistant for Gmail and Outlook that labels incoming mail, drafts replies in your voice, blocks cold emails and bulk-unsubscribes, alongside a free email app.
About Inbox Zero
Busy inboxes take hours to sort and answer by hand.
Who it’s for
- Founders and executives with heavy email
- Small teams on Gmail or Outlook
When to consider it
Consider Inbox Zero when you want an assistant that sorts your inbox and leaves pre-drafted replies waiting, with its source code published on GitHub.
Tradeoffs & limitations
- Source-available rather than open-source: its AGPL-3.0 licence adds terms that forbid monetizing the software without permission and require an enterprise licence for organizations with five or more business users.
- The email app is free; AI plans cost $18, $28 or $42 per user per month billed annually ($20, $35 or $50 monthly), each with a 7-day free trial.
SOTA overview · Documentation-based assessment · Sources & review method
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Sources & review method
Documentation-based assessment · Oct 31, 2026 · Prepared with AI assistance; not a hands-on benchmark.
Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.
Import history & original evidence
Inbox Zero official website
An AI email assistant for Gmail and Outlook that labels incoming mail, drafts replies in your voice, blocks cold emails and bulk-unsubscribes, alongside a free email app.
Based on official pages and announcements checked on 2026-10-31. No hands-on test, performance benchmark or popularity ranking is claimed.