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Inbox Zero

Open source AI email assistant for Gmail and Outlook

Free trial · from $18/moEmailChecked Oct 9, 2026
Visit getinboxzero.com
Inbox Zero, as pictured on getinboxzero.com
How Inbox Zero presents itself. Image from getinboxzero.com.

What is Inbox Zero?

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.

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

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.

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.

Inbox Zero pricing

Starts at
$18 per user / month, billed annually ($20 billed monthly)
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.
Starter$18per user / month, billed annually; $20 billed monthlySorts and labels every email, drafts replies in your voice, blocks cold emails, bulk unsubscribe and archive, email analytics and pre-meeting briefings.
Plus$28per user / month, billed annually; $35 billed monthlyAdds 2 email accounts per user, the AI meeting notetaker, Slack and app integrations, email digests, auto-filed attachments and an unlimited knowledge base.
Professional$42per user / month, billed annually; $50 billed monthlyEverything in Plus, plus team-wide analytics, priority support and a dedicated onboarding manager.
EnterpriseCustomSSO, SCIM, on-premise deployment and a dedicated account manager, arranged with the sales team.

Read from getinboxzero.com on Oct 9, 2026. Prices change, so confirm with Inbox Zero before you buy.

Pricing in detail

Ways to pay less

  • Annual discountSave up to 20% with annual billing

    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%.

    Stated on getinboxzero.com
  • EducationStudent discount on request

    The pricing FAQ says students can email the company to have a discounted plan set up. The size of the discount is not published.

    Stated on getinboxzero.com
  • NonprofitNonprofit and open-source project discounts

    The same FAQ answer covers nonprofits and open-source projects, which can email for a discounted plan. No rate is published.

    Stated on getinboxzero.com

Works with

Inbox Zero alternatives

All Inbox Zero alternatives comparedAll email apps

Common questions

Is Inbox Zero free?

No, Inbox Zero is a paid product, but you can try it first. 7-day free trial on every plan; a credit card is required. Refunds are offered within 14 days of upgrading.

How much does Inbox Zero cost?

Inbox Zero lists 4 plans. Starter: $18 per user / month, billed annually; $20 billed monthly. Plus: $28 per user / month, billed annually; $35 billed monthly. Professional: $42 per user / month, billed annually; $50 billed monthly. Enterprise: custom pricing. Prices were read from getinboxzero.com on Oct 9, 2026.

What platforms does Inbox Zero work on?

Inbox Zero is available on Web, macOS, Windows, iOS and Android. It also has a browser extension.

Does Inbox Zero offer any discounts?

Inbox Zero publicly lists the following: Save up to 20% with annual billing; Student discount on request; Nonprofit and open-source project discounts.

Does Inbox Zero have a Linux app?

No Linux app was listed when its pages were read on Oct 9, 2026. Inbox Zero is listed for Web, macOS, Windows, iOS and Android.

Is Inbox Zero open source?

Yes. Inbox Zero is open source, according to its own site. It can also be run on a server of your own.

What does Inbox Zero integrate with?

Inbox Zero's listing names Gmail, Outlook, Slack, Telegram, Google Drive, OneDrive, Notion and Stripe. A listing names up to eight integrations, so it may connect to more.

Does Inbox Zero have a student discount?

Student discount on request. The pricing FAQ says students can email the company to have a discounted plan set up. The size of the discount is not published.

Who makes Inbox Zero?

Inbox Zero is made by Inbox Zero Inc.

What are the alternatives to Inbox Zero?

The closest alternatives to Inbox Zero in our directory are Fyxer, Jace AI, Cora, SaneBox and Superhuman Mail. Each one has a side-by-side comparison with Inbox Zero.

Sources for this page

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