Inbox Zero is an open-source AI email assistant that sits on top of Gmail and Outlook and does the triage work most people never get to. It categorises incoming mail, clears newsletters and cold outreach in bulk, drafts replies in your own voice, and reminds you about threads that went quiet. It suits overloaded Gmail and Outlook users who want their inbox handled without switching mail providers.[1][2]
Quick verdict
Teams drowning in repetitive Gmail or Outlook mail benefit most from Inbox Zero. Its AI agent categorises messages, drafts answers, and clears bulk mail inside the mailbox people already use. The hosted plans start at $20 per user per month with metered AI credits, so purely cost-driven individuals should look elsewhere. If you want AI triage without leaving Gmail, choose Inbox Zero; if you want a different mail service entirely, choose an alternative like HEY instead.[1][2][3]
What Inbox Zero does for your inbox
AI agent that triages and answers repetitive mail The assistant categorises incoming messages and drafts or sends answers for the repetitive ones, so routine mail stops consuming the morning.[1][2]
One-click newsletter and bulk cleanup A dedicated cleanup flow unsubscribes and archives newsletters in bulk instead of one message at a time.[1]
Cold-email blocker Unsolicited outreach is screened out automatically, keeping prospecting mail away from the main view.[1]
Reply drafting in your writing style Drafts are generated to sound like you, drawing on past messages, and stay editable before sending.[1][2]
Follow-up reminders for quiet threads The tracker surfaces conversations that never got a reply so nothing slips through the cracks.[1]
Meeting scheduling from the inbox Scheduling links and calendar views arrange meetings without leaving the mail workflow.[1]
Works inside Gmail, supports Outlook Personal Gmail connects in about a minute, and Outlook accounts are supported, so there is no mailbox migration.[1][2]
Self-hostable open source with API and webhooks The public repository documents self-hosting with environment setup, database migrations, and cron, plus a REST API, webhooks, and OAuth for programmatic access.[1]
Who will love it
Overloaded Gmail users If the inbox fills faster than you can triage, the AI categorisation and bulk cleanup directly attack the backlog.[1][2]
People buried in repetitive replies Drafting in your voice plus automated answers and follow-up reminders compress routine correspondence.[1]
Teams and self-hosters who want control Team plans centralise a shared inbox, while the open repository and API let technical teams host and extend it themselves.[1][2]
Who should avoid it
Cost-driven individuals Hosted use starts at $20 per user per month with metered AI credits, so free-mail users pay for the convenience.[1]
People outside Gmail and Outlook Only Google and Microsoft accounts are documented, so other providers are not served.[1]
Anyone wanting zero administration Self-hosting needs environment setup, migrations, and cron, and the licence adds commercial-use terms that need legal review.[1][2]
Compatibility and setup
One-click Gmail connection, Outlook supported Personal Gmail accounts connect in about a minute; Microsoft/Outlook accounts are supported; no mailbox migration is needed.[1]
Self-hosting needs env, database, and cron The repository documents environment setup, database migrations, and cron configuration for self-hosters.[1]
API, webhooks, and OAuth for integrations Programmatic access runs through a REST API with webhooks and OAuth authentication.[1]
Questions worth asking
What is the best Inbox Zero alternative for non-technical users?
Is Inbox Zero really no-code?
How much does Inbox Zero cost per month?
Starter costs $20 per month, Plus $35, and Professional $50, per user with 5 seats included, as listed in October 2026. Annual billing saves up to 20%, a 7-day free trial needs no card, and AI usage is metered in credits with rollover. Enterprise is custom-priced with dedicated support and SSO.[1]
Can you self-host Inbox Zero?
Sources and editorial review
Source research. Reviewed on October 11, 2026. Written by Sanjib Sah. AI assisted; reviewed by a human editor.
We have not run or tested this product.
- Inbox Zero: AI personal assistant for email
official · Observed October 11, 2026
Positioning, mailbox connections, feature list, plan lineup, trial terms; vendor quotes not used as testimonials.
- Inbox Zero pricing
official · Observed October 11, 2026
Plan prices, billing periods, trial, AI credits, Enterprise/SSO/support terms.
- elie222/inbox-zero repository
official · Observed October 11, 2026
Feature catalogue, self-host/API/OAuth docs, tech stack, repo health signals as observed.
- inbox-zero LICENSE
official · Observed October 11, 2026
AGPL-3.0 grant plus Inbox Zero Inc. additional commercial-use terms; basis for the licence gap.