Productivity Freemium

Inbox Zero

Open-source AI email assistant for inbox automation, replies, scheduling, and analytics

Visit official website
PricingFreemium
Starting price$18/user/mo billed annually
Free planYes
Free trialYes
APIYes
Open sourceYes
DeploymentHybrid
Last verifiedJuly 31, 2026
Overview

Tool overview

Inbox Zero is listed under Productivity AI tools.

Summary

What is Inbox Zero?

Inbox Zero organizes Gmail and Outlook inboxes, pre-drafts replies, creates natural-language automation rules, blocks cold email, manages calendars, files attachments, and provides analytics. Teams can use the hosted service or deploy the open-source application themselves.

Best fit

Best for

Individuals and teams automating high-volume email workflows

Audience

Who is it for?

Executives and foundersSales and service teamsEmail-heavy professionalsSelf-hosting teams
Recommendation

Decision note

Rebuilt from the original export under the complete V412/V411 factual-source-verification workflow. Preview only. Apply remains blocked until Failures = 0, Warnings = 0, Unmapped = 0, Missing = 0; explicit clears are reviewed; image import is disabled or V380 accepts the asset; a representative WordPress edit screen is compared with the export and proposed row; and a post-Apply zero-change Preview succeeds.

Capabilities

Key features

AI inbox sorting and reply drafting

Natural-language automation rules and cold-email blocking

Meeting briefs, booking links, and calendar context

REST API, CLI, Slack, Telegram, and self-hosting

Workflows

Use cases

Reduce inbox triage and reply time

Bulk unsubscribe and archive newsletters

Automate email filing and attachment handling

Manage Gmail and Outlook through scripts or chat

Strengths

Pros

  • Seven-day trial without a card
  • Supports Google and Microsoft mailboxes
  • Open-source self-hosting path
Considerations

Limitations

AI drafts should be reviewed before sending, especially for commitments, sensitive data, or legal statements. The hosted free experience is a trial

ongoing no-cost use requires self-hosting the source code.

Cost

Pricing details

Pricing modelFreemium
Starting price$18/user/mo billed annually
Free planYes
Free trialYes
Pricing context

Billing options

MonthlyAnnualSelf-hosted open-sourceEnterprise custom
Pricing context

Pricing note

Hosted Starter is $20/user/month or $18 billed annually. Plus is $35 monthly or $28 annually, Professional is $50 monthly or $42 annually, and every hosted plan has a seven-day trial. Self-hosting is available from source.

View official pricing
Compatibility

Supported languages

  • English
Connectivity

Integrations

Gmail

Google Workspace

Outlook

Microsoft 365

Slack

Telegram

Google Drive

OneDrive

Google Calendar

Microsoft Calendar

Specs

Technical details

PlatformsWeb, Chrome extension, API
Multilingual supportUnknown
Login requiredYes
Open sourceYes
DeploymentHybrid
CompanyInbox Zero
Editions / plansFree, Basic, Professional, Organization, and Custom plans
Data confidenceHigh
Last verifiedJuly 31, 2026
Documentation → Source code → Data source →
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Answers

Frequently asked questions

Inbox Zero organizes Gmail and Outlook inboxes, pre-drafts replies, creates natural-language automation rules, blocks cold email, manages calendars, files attachments, and provides analytics. Teams can use the hosted service or deploy the open-source application themselves.
Individuals and teams automating high-volume email workflows
The listed pricing model for Inbox Zero is Freemium. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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