# Inbox Zero

> Open source AI email assistant for Gmail and Outlook

Inbox Zero is an open source AI email assistant that connects to Gmail, Google Workspace and Microsoft Outlook accounts. It labels incoming mail, drafts replies in the user's tone, blocks cold emails and unsubscribes from unread newsletters in bulk, following rules written in plain English. It works in the background of Gmail and Outlook, and it also offers its own email client, mobile and desktop apps, and chat through Slack and Telegram.

- **Category:** Email Apps
- **Made by:** Inbox Zero Inc.
- **Website:** https://www.getinboxzero.com
- **Runs on:** Web, macOS, Windows, iOS, Android, Browser extension
- **Facts last checked:** Oct 9, 2026

## Pricing

Inbox Zero is a paid product with a free trial, starting at $18 per user / month, billed annually ($20 billed monthly).

- **Pricing model:** Free trial
- **Free plan:** None.
- **Free trial:** 7-day free trial on every plan; a credit card is required. Refunds are offered within 14 days of upgrading.

| Plan | Price | What you get |
| --- | --- | --- |
| Starter | $18 per user / month, billed annually; $20 billed monthly | Sorts and labels every email, drafts replies in your voice, blocks cold emails, bulk unsubscribe and archive, email analytics and pre-meeting briefings. |
| Plus | $28 per user / month, billed annually; $35 billed monthly | Adds 2 email accounts per user, the AI meeting notetaker, Slack and app integrations, email digests, auto-filed attachments and an unlimited knowledge base. |
| Professional | $42 per user / month, billed annually; $50 billed monthly | Everything in Plus, plus team-wide analytics, priority support and a dedicated onboarding manager. |
| Enterprise | Custom | SSO, SCIM, on-premise deployment and a dedicated account manager, arranged with the sales team. |

Read from https://www.getinboxzero.com/pricing on Oct 9, 2026. Prices change, so confirm with Inbox Zero before buying.

## Ways to pay less

- **Save up to 20% with annual billing** (Annual discount): Annual billing lowers Starter from $20 to $18, Plus from $35 to $28 and Professional from $50 to $42 per user a month. The pricing FAQ puts the saving at up to 20%. Source: https://www.getinboxzero.com/pricing
- **Student discount on request** (Education): The pricing FAQ says students can email the company to have a discounted plan set up. The size of the discount is not published. Source: https://www.getinboxzero.com/pricing
- **Nonprofit and open-source project discounts** (Nonprofit): The same FAQ answer covers nonprofits and open-source projects, which can email for a discounted plan. No rate is published. Source: https://www.getinboxzero.com/pricing

## Key features

- **AI labels and plain-English rules:** Incoming mail is sorted into categories such as To Reply, Newsletter, Marketing and Cold Email. You can add categories of your own and describe in plain English how the assistant should handle mail.
- **Pre-drafted replies:** Emails that need a response get a draft written in your tone, based on your email history and calendar, waiting in the inbox for you to review and send.
- **Bulk unsubscribe and archive:** Shows which senders you never read so you can unsubscribe from and archive them in one click. A cold email blocker and email analytics are part of every plan.
- **Optional email client:** A keyboard-first client for Gmail and Outlook on web, desktop and iPhone, with a split inbox, a command palette, several accounts in one inbox and team comments that are never sent as email.
- **Chat from Slack and Telegram:** The assistant can be reached from Slack or Telegram to read mail, draft replies and manage the inbox. The pricing page lists the Slack integration from the Plus plan.
- **Open source and self-hosting:** The code is public on GitHub, with the web and desktop email client under the AGPL license. The docs cover self-hosting with Docker, on Vercel, AWS or Kubernetes.

## Good for

- Gmail and Outlook users who want mail sorted and replies drafted for them
- Teams that prefer open source software they can inspect or self-host
- Clearing newsletters and cold outreach out of a crowded inbox

## Worth knowing

- There is no free plan for the hosted service: every plan starts with a 7-day trial that needs a credit card.
- It supports Gmail, Google Workspace and Microsoft Outlook accounts only.
- The AI meeting notetaker, Slack and app integrations, email digests and auto-filed attachments start at Plus.
- The free Inbox Zero Tabs browser extension works with Gmail only, and the mobile apps leave some settings to the web app.

## Works with

Gmail, Outlook, Slack, Telegram, Google Drive, OneDrive, Notion, Stripe

**Tags:** Inbox filtering, AI features, Workflow automation, Email client, Chat assistant, Open source, Self-hostable

## Alternatives

- [Fyxer](https://toolgpa.com/tools/fyxer): AI assistant that sorts email, drafts replies and takes meeting notes. [Compare](https://toolgpa.com/compare/fyxer-vs-inbox-zero)
- [Jace AI](https://toolgpa.com/tools/jace-ai): AI email agent with a web inbox for Gmail and Outlook. [Compare](https://toolgpa.com/compare/inbox-zero-vs-jace-ai)
- [Cora](https://toolgpa.com/tools/cora): AI email assistant for Gmail that screens, drafts and briefs. [Compare](https://toolgpa.com/compare/cora-vs-inbox-zero)
- [SaneBox](https://toolgpa.com/tools/sanebox): AI email filtering that works inside the email app you already use. [Compare](https://toolgpa.com/compare/inbox-zero-vs-sanebox)
- [Superhuman Mail](https://toolgpa.com/tools/superhuman): Keyboard-driven email client for Gmail and Outlook with built-in AI. [Compare](https://toolgpa.com/compare/inbox-zero-vs-superhuman)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://www.getinboxzero.com/
- https://www.getinboxzero.com/pricing
- https://www.getinboxzero.com/desktop
- https://www.getinboxzero.com/email-client
- https://www.getinboxzero.com/about
- https://www.getinboxzero.com/terms
- https://docs.getinboxzero.com/introduction
- https://docs.getinboxzero.com/essentials/mobile-apps
- https://docs.getinboxzero.com/essentials/inbox-zero-tabs-extension
- https://docs.getinboxzero.com/hosting/quick-start
- https://raw.githubusercontent.com/elie222/inbox-zero/main/README.md

Page: https://toolgpa.com/tools/inbox-zero
Listed by ToolGPA (toolgpa.com).