Inbox Zero

Inbox Zero is an open-source AI personal assistant for email with more than 12,700 stars on GitHub, built to help busy professionals reach inbox zero fast — and stay there.

Overview

Email overload is a sorting problem, and Inbox Zero treats it that way. Connect a Gmail or Outlook account and the AI assistant labels and organizes everything automatically, blocks cold emails, and — the feature users love most — pre-drafts replies in your own voice, so when you open your inbox the responses are already written and waiting for a quick review and send. Rules are configured in plain English rather than filter syntax, bulk unsubscribe clears out newsletters you never read, and analytics show exactly who and what is clogging your inbox. Drafts can even take your calendar and availability into account. The assistant works inside Gmail and Outlook, from Slack and Telegram, and through Inbox Zero’s own email app on web, desktop, and iPhone. The code is fully open source and SOC 2 Type 2 certified, and you can self-host it if you want total control over your mail data. More than 25,000 professionals use it today.

Key Features

• Automatic organization – every email is labeled and sorted the moment it arrives.
• Pre-written drafts – replies drafted in your voice, informed by your email history and calendar.
• Cold email blocker – unsolicited pitches are stopped before they reach you.
• Bulk unsubscribe and archive – clear newsletters you never read in a few clicks.
• Plain-English rules – customize behavior by describing it, not by writing filter syntax.
• Email analytics – see your top senders and what is actually filling your inbox.
• Works where you work – Gmail, Outlook, Slack, Telegram, and native apps; open source and self-hostable.

💳 Pricing

Inbox Zero’s email app is free, and the open-source code can be self-hosted at no cost. The hosted AI assistant is Freemium: paid plans start at $18/month for AI drafting and sorting, with Plus and Professional tiers adding integrations, multiple accounts, and team analytics; a 7-day free trial is available.

Who Is It For

Executives, founders, and professionals drowning in email who want an assistant that triages, drafts, and files for them — without handing their inbox to a closed, unauditable service.