Zero

Zero

Experience email the way you want with 0 - the first open source email app that puts your privacy and safety first.

Created Aug 29, 2025
Updated May 31, 2026

What it is

Zero is an AI-native email client designed to automate inbox management and save time. It is primarily targeted at power users, professionals, and teams who handle a high volume of email and require efficient processing tools.

Main Features

AI Automation

  • AI-powered email summarization for long threads
  • AI-driven response drafting
  • Automatic extraction of action items from emails

Interface & Navigation

  • Keyboard-first navigation for rapid inbox processing
  • Command palette (⌘K) for quick search and actions
  • Customizable email processing flows and rules
  • Smart search functionality by sender, subject, or content
  • Ability to pin important emails and conversations
  • Categorization system for time-sensitive notifications, security alerts, and project updates

Integrations

  • Displays emails from integrated services like Stripe, Netflix, Figma, Asana, and GitHub within the client

How it works

Managing High-Volume Inboxes

Users navigate their entire inbox using keyboard shortcuts. They can quickly archive (⌘E), mark as read (⌘M), or reply (⌘R) to emails. The AI automatically summarizes long threads and extracts key action items, allowing users to process hundreds of emails in minutes.

Drafting and Replying

The AI drafts responses based on email context. Users can adjust the tone (e.g., Neutral) and length (e.g., Medium-length) of drafts before sending. A natural language chat interface allows users to ask questions about their emails or command the AI to perform actions like Reply to Nick or Find invoice from Stripe.

Triage and Prioritization

Emails are automatically categorized into sections like Personal, Security, Deadlines, and Urgent Updates, and Pinned. This helps users immediately identify and focus on time-sensitive and critical communications.

Key Points

  • The product is currently in beta.
  • It is backed by Y Combinator.
  • The design emphasizes extreme speed and efficiency, aiming to reduce time spent on email management.
  • It offers a free tier with no credit card required to get started.

Additional Details

  • Pricing: A free tier is available. A link to a detailed pricing page is provided on the website.
  • Availability: Accessible via web browser.
  • Security: The company provides a link to its SOC2 compliance information.
  • Company: Developed by Zero Email Inc.
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