Stack Score

Editorial pick✓ Verified working

Inbox Zero

Open-source AI assistant for Gmail that drafts, archives, and unsubscribes.

Try Inbox Zero✓ Free trial available

Best for

Best for Gmail power users who want AI-drafted replies, smart unsubscribes, and rules without sending data to Superhuman.

At a glance

Pricing: freemiumfrom $16/mo
Setup time: 15 minutes to connect
Learning curve: easy
Last verified: 5/21/2026

What we love

✓Open-source — you can self-host
✓Rules system is genuinely flexible
✓Active development and transparent roadmap

Where it falls short

−Gmail-only, no Outlook support
−Self-hosting still requires technical comfort
−AI usage costs add up on heaviest tier

Pricing

✓ Pricing verified May 21, 2026

4 tiers

Free

per month

✓Basic bulk unsubscribe
✓Limited AI credits
✓Open-source code access

Basic

$16

per month, billed annually

✓Full AI assistant
✓Unlimited rules
✓Cold email blocker

Pro

$24

per month, billed annually

✓Higher AI usage
✓Priority support
✓Advanced analytics

Business

Custom

annual contract

✓Team seats
✓SSO
✓Dedicated support

Why we picked it

Inbox Zero is the rare open-source productivity tool with real polish. The AI assistant rules feel a generation ahead of Gmail-native filters.
— MoreAI.tools editor

Overview

Inbox Zero is an open-source AI email assistant built specifically for Gmail. It writes drafts, runs rules on incoming mail, makes unsubscribing one click, and provides a sender-by-sender analytics view. Self-hostable for the privacy-minded.

Key features

●AI assistant with prompt-based rules
●One-click unsubscribe and block
●Bulk archive by sender
●Sender analytics dashboard
●AI draft replies in your voice
●Cold email blocker
●Self-hostable open-source codebase

Best use cases

Newsletter cleanup

Bulk unsubscribe and archive by sender from one dashboard.

AI rules

Tell it in plain English: archive shipping notifications and label receipts.

Drafted replies

Pre-drafts reply suggestions you can edit and send.

Integrations

Gmail

Google Workspace

OpenAI

Anthropic

Self-hosted Docker

GitHub

Webhooks

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