Leanbox

What is Leanbox?

Leanbox is an open-source inbox management AI agent that helps you reach inbox zero across multiple accounts. It connects to your email and social inboxes, then automatically sorts through noise, drafts replies, archives junk, and unsubscribes from spam. The tool is designed to clear clutter quickly without requiring you to manually triage every message. It is free to use and can be hosted on your own infrastructure.

Application scenarios

Email overload
Quickly triage a cluttered Gmail inbox by archiving, replying, and unsubscribing in bulk.
Instagram DM management
Sort through direct messages on Instagram to keep your social inbox organized.
Daily digest
Receive a summary of recent messages so you can stay on top of updates without reading every thread.
Team chat triage
Connect Slack to manage team messages and reduce notification fatigue (integration listed as coming soon).
Multi-account cleanup
Manage multiple email accounts from a single dashboard to achieve inbox zero everywhere.

Core Features

Open-source self-hosting
Leanbox is free and open source, allowing you to host it on your own infrastructure for full control.
Inbox triage
The AI agent sorts through noise, identifies messages that need replies, and suggests which ones to archive or unsubscribe from.
Draft replies
Leanbox drafts responses for you, but it does not automatically send them—you review and send manually.
Smart unsubscribing
The tool detects newsletters and emails you rarely open, then offers to unsubscribe from them in bulk.
Multi-account support
Connect Gmail, Instagram, and Slack (with Microsoft and WhatsApp coming soon) to manage all inboxes in one place.
Daily digest
Receive a summary of your recent messages to quickly catch up on important updates.
Custom instructions
Add additional instructions to guide how the AI triages your inbox.
GitHub integration
The project is hosted on GitHub, where you can star the repo and access documentation.

Target users

Leanbox is ideal for busy professionals, remote workers, and anyone juggling multiple email and social inboxes. It also suits developers and privacy-conscious users who prefer self-hosted open-source solutions for managing their digital clutter.

How to use Leanbox?

Connect your inbox: Link your Gmail or Instagram accounts to Leanbox.
Add instructions: Optionally provide additional instructions to customize how the AI triages your messages.
Tap "Triage My Inbox": Leanbox scans your inbox and presents suggestions for replies, archives, and unsubscribes.
Review and confirm: Check the drafted replies and suggested unsubscribes, then finish to apply the changes.
Self-host (optional): Follow step-by-step guides to host Leanbox on your own server for full data control.

Pricing and free trial

Leanbox is free and open source. There are no paid tiers or subscription fees mentioned on the website.

Effect review

Leanbox delivers a straightforward, no-nonsense approach to inbox management. The ability to self-host on your own infrastructure addresses privacy concerns that many cloud-only tools ignore. The triage process is practical—it drafts replies without sending them automatically, which gives you final control over communications. While the tool currently supports only Gmail and Instagram (with Slack, Microsoft, and WhatsApp listed as "coming soon"), its core functionality is solid for those two platforms. For users drowning in email clutter, Leanbox offers a free, transparent way to regain control without sacrificing privacy.

Frequently Asked Questions

How does Leanbox achieve inbox zero quickly?

Leanbox uses smart automation to analyze, categorize, and clear clutter across all your email accounts in seconds, helping you reach inbox zero effortlessly.

Can Leanbox handle multiple email accounts?

Yes, Leanbox integrates with all your email accounts, allowing you to manage and organize them from a single interface.

Is Leanbox secure and private?

Absolutely. Leanbox uses encryption and follows strict data protection standards to ensure your emails and personal information remain confidential.

Does Leanbox work with any email provider?

Leanbox supports major email providers like Gmail, Outlook, Yahoo, and others, as well as custom domains via IMAP.

How does Leanbox decide what to clear?

Leanbox uses AI to identify spam, newsletters, and low-priority emails, then automatically archives or deletes them based on your preferences.

Is there a free trial available?

Yes, Leanbox offers a free trial so you can test its features before committing to a subscription.