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Listed · Reviewed Mar 2026 · 7-criteria rubric
AI Productivity Tools

Inbox Zero

Open Source AI Email Assistant For Inbox Organization And Reply Drafting

by Inbox Zero · United States · Founded 2024

Pricing
From $18/mo
Platforms
API
Available
Last Updated
Mar 17, 2026

What is Inbox Zero?

Inbox Zero is an open-source AI email assistant that automatically organizes inboxes, pre-drafts replies matching your voice, and helps achieve inbox zero faster. The platform connects with Gmail and Microsoft Outlook, using artificial intelligence to categorize senders, block cold emails, and generate contextual responses based on your calendar and CRM data.

Users can configure email handling rules using plain English prompts, similar to ChatGPT interactions. With built-in bulk unsubscribe functionality, email analytics dashboards, and Reply Zero tracking for pending responses, Inbox Zero eliminates email overwhelm for busy professionals. The fully open-source codebase allows self-hosting options for maximum data control, backed by SOC 2 Type 2 certification for enterprise-grade security.

Inbox Zero — Open Source AI Email Assistant For Inbox Organization And Reply Drafting Whether you're evaluating Inbox Zero for your team or comparing it to alternatives in the AI Productivity Tools category, this in-depth review covers everything: features, pricing, real user reviews, pros and cons, integrations, and direct comparisons against competitors.

Key Features 8

AI-Powered Email Assistant That Automatically Labels Sorts and Organizes Your Inbox
Pre-Drafted Smart Replies Written in Your Voice Based on Email History
One-Click Bulk Unsubscribe From Newsletters and Emails You Never Read
Calendar and CRM Integration for Context-Aware Scheduling in Drafted Responses
Plain English Customizable Rules to Automate Email Workflows Without Any Coding
Email Analytics Dashboard Showing Who Emails You Most and Inbox Patterns
Open Source SOC 2 Type 2 Certified Platform With Full Self-Hosting Option
Works Alongside Gmail Google Workspace and Microsoft Outlook as a Smart Layer

Who Is Inbox Zero For

1 Executives Managing High Email Volumes
2 Entrepreneurs And Solopreneurs
3 Sales Teams Handling Outreach
4 Customer Support Representatives
5 Developers Seeking Self-Hosted Solutions

Pros & Cons

Pros 4 benefits
  • Fully Open Source Codebase
  • SOC 2 Type 2 Certified
  • Natural Language Rule Configuration
  • Self-Hosting Deployment Available
Cons 3 limitations
  • Limited To Gmail/Outlook Only
  • No Native Mobile App
  • Third-Party Integrations In Beta

Frequently Asked Questions

5 questions

Who is Inbox Zero for?

Inbox Zero is most useful for Executives Managing High Email Volumes, Entrepreneurs And Solopreneurs, Sales Teams Handling Outreach and Customer Support Representatives.

Inbox Zero pricing

Inbox Zero uses a freemium model: a usable free tier with optional paid upgrades. Headline pricing: From $18/mo. For the current tier breakdown and any limits, see the pricing section above or check the vendor's pricing page directly — limits and prices change.

What's New

Google Calendar And Third-Party Integrations October 2025

Added Google Calendar integration and early access to Notion, Stripe, Monday.com, and HubSpot integrations for contextual AI responses

Oct 13
New Default Rules And AI Analytics October 2025

Introduced Actioned and FYI default rules, improved customization for To Reply and Awaiting Reply features, and added AI Assistant analytics dashboard

Oct 13
View all updates

Security & Privacy

SOC 2 Type 2
Open source codebase for transparency Self-hosting option for complete data control No AI training on user data

All Features of Inbox Zero

1
AI-Powered Email Assistant That Automatically Labels Sorts and Organizes Your Inbox
2
Pre-Drafted Smart Replies Written in Your Voice Based on Email History
3
One-Click Bulk Unsubscribe From Newsletters and Emails You Never Read
4
Calendar and CRM Integration for Context-Aware Scheduling in Drafted Responses
5
Plain English Customizable Rules to Automate Email Workflows Without Any Coding
6
Email Analytics Dashboard Showing Who Emails You Most and Inbox Patterns
7
Open Source SOC 2 Type 2 Certified Platform With Full Self-Hosting Option
8
Works Alongside Gmail Google Workspace and Microsoft Outlook as a Smart Layer

Inbox Zero User Reviews

No reviews yet. Be the first to review Inbox Zero!

Inbox Zero Pricing

From $18/mo

POPULAR
Starter
$18 /user /month (billed annually)
  • Sorts and labels every email
  • Drafts replies in your voice
  • Blocks cold emails
  • Bulk unsubscribe and archive emails
Professional
$42 /user /month (billed annually)
  • Everything in Starter
  • Unlimited knowledge base
  • Team-wide analytics
  • Priority support
Save 10-16% with annual billing
View Pricing

Company Info

Company Inbox Zero
Location United States
Founded 2024
Team Size 1-10

Inbox Zero Popularity

270
Views
20
Clicks
0
Reviews
-
Rating

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Open Source AI Email Assistant For Inbox
Freemium ★★★★★ 4.5
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