Inbox Zero

The core of Inbox Zero is the assistant. It reads incoming email, decides what each message is, and takes the action you set. Messages that need an answer get a "To Reply" label with a draft reply waiting in the drafts folder. Everything else is sorted by category, and categories you mark as noise, such as marketing or cold email, are archived out of the way. You control all of this with rules written in plain English. Instead of building filters from dropdowns, you describe the behavior: archive receipts after a week, label invoices, reply to event invitations with a scheduling link. The assistant reads the rule and applies it. When a rule misfires, you edit the sentence, not a form. The defaults cover the common cases, so most accounts work from day one and get tuned over the first week.

Beyond the automatic rules, Inbox Zero gives you a chat window into the same engine. You can search the inbox, summarize a thread, read supported attachments, and act on what you find. Ask it to archive newsletters and unsubscribe from their senders, and it does both. Ask why an email was archived, and it explains the rule that caught it. The chat handles writing too. You can prepare a new message, a reply, or a forward, then review and send it from a confirmation card rather than typing everything by hand. The same chat runs from Slack, Microsoft Teams, or Telegram, so you can manage mail without opening the mailbox. It also remembers preferences you ask it to keep, such as a standing choice for 30-minute afternoon meetings.

These two tools clear a backlog fast. Bulk unsubscribe scans the senders filling your inbox and lets you unsubscribe, archive, or delete in bulk, which is the part most people never get to by hand. Bulk archive takes older mail, groups it by sender category, and applies the same action across a large batch. For anyone who abandoned their inbox months ago, this is the feature that makes the rest usable. You run the cleaner once, cut the volume down, and let the automatic rules handle what arrives after that. It pairs with the cold email blocker, which uses AI filters to keep new spam from rebuilding the pile you just cleared.

Inbox Zero connects to your calendar rather than guessing. When someone proposes a meeting by email, the assistant can draft a reply that offers your real free slots. Booking links go further: you share your availability and guests pick a time that lands on your calendar without the back-and-forth. Meeting briefs work the other way round. Before a call with an external contact, the assistant pulls context from your email and calendar so you walk in knowing the history. These features matter most for roles where scheduling is a daily task and the alternative is a chain of "does Tuesday work" emails.

The assistant does not live only in the browser. You can connect Slack, Microsoft Teams, or Telegram and chat with it there, receiving rule activity, drafts, and updates in a channel you already watch. That keeps inbox management inside the tools your team uses instead of adding a tab. For people who work inside another AI client, Inbox Zero exposes a remote MCP server. ChatGPT, Claude, or Cursor can search your mail, create drafts, manage rules, and read email statistics through it. It cannot send email: drafts stay in the mailbox until you send them. This is a deliberate limit, and it keeps a human in the loop before anything leaves.

Inbox Zero is open source. The hosted version runs at getinboxzero.com, and the code is public on GitHub under the elie222/inbox-zero repository. Teams with data rules that bar third-party hosting can self-host it with Docker, deploy on a VPS, Vercel, AWS, or Kubernetes, and configure their own Google or Microsoft OAuth credentials and AI provider. That choice is the main thing setting it apart from closed inbox assistants. You can read the code, run it on your own hardware, and connect your own AI API key for the features that call a model. Enterprise deployments add SAML SSO and SCIM user provisioning for organizations that need them.