The inbox that
reads itself.
Metis Mail is an open-source mail client for Gmail, Outlook, and Zoho — with an AI agent that lives next to your inbox, drafts in your voice, and never sends a thing without your say-so.
Code on GitHub. Hosted version free while in beta. Your mail stays with your provider — always.
A mail client you already know,
with an AI that quietly helps
Connect a mailbox, and Metis works like the email app you're used to — only smarter. Your mail stays with your provider; Metis never stores it elsewhere.
Sign in once, pick Gmail, Microsoft 365, or Zoho Mail, and grant access. You can connect more than one mailbox and switch from the sidebar. Disconnect at any time and access is revoked immediately.
Open Metis. The agent panel sits next to your mail. Ask it to triage, summarize threads, draft replies, or flag suspicious senders. It never sends or deletes anything without your explicit confirmation.
A chat panel right next to your mail. Ask for a summary of your morning, a draft reply, or who's waiting on you.
Each message gets a verdict before you open it: legitimate, suspicious, or phishing — plus the specific reasons why.
Everything you see here is in the open-source release. No gated "Pro AI" tier hiding the good parts.
A full mail client,
with an AI agent next to it
Everything you expect from a modern mail client, plus an AI agent that actually understands your inbox. Open source, end to end.
A mail client,
and an agent that lives in it
The mail client you already know, paired with an AI that lives where you read your email — not in a separate tab.
An inbox agent that actually helps
Ask in plain English. The agent reads your mail, summarizes threads, drafts replies in your voice, and triages on request. It asks before deleting anything, so you stay in control of what happens to your inbox.
Smart replies & thread TL;DR
Three labelled reply drafts appear above the compose strip the moment a message opens. Long threads get a TL;DR card with key facts and open action items, kept fresh as new messages arrive.
Phishing analysis you can trust
Every message you open is checked and labelled with a verdict, a risk score, and the specific reasons it was flagged — visible before you read a single word. Nothing hidden, nothing black-box.
Open source, end to end
Every part of Metis Mail lives in a public repository. Read the code, file issues, send pull requests, fork it. Run it on your own servers or use our hosted version — the source is the same either way.
"An open-source mail client that ships with the agent already wired up."
How Metis Mail compares
Stacked against the AI mail clients, the defaults you already have, and the open-source alternatives.
| Capability | Metis Mail | Superhuman | Shortwave | Notion Mail |
|---|---|---|---|---|
| Open source — read & audit the code | Yes | No | No | No |
| Self-host on your own servers | Yes | No | No | No |
| Works with Gmail | Yes | Yes | Yes | Yes |
| Works with Outlook / Microsoft 365 | Yes | Yes | No | Limited |
| Works with Zoho Mail | Yes | No | No | No |
| Inbox AI agent (chat next to your mail) | Yes | Limited | Yes | Yes |
| Thread summaries that update over time | Yes | On demand | Yes | On demand |
| Built-in phishing analysis | Yes | Spam only | Spam only | Spam only |
| Bring your own AI model | Yes | No | No | No |
| Free tier with full features | Self-host | $30 / mo | Free, paid AI | Paid |
Comparisons are based on publicly documented features of each product as of 2026. Other products and their trademarks belong to their respective owners; nothing here is an endorsement.
Self-host free, or let us run it
Self-host the open-source release for free, or let us run it for you. Same features, same code — choose whichever fits your team.
Open source
The complete client and phishing checker, free forever for anyone who wants to run their own.
Run on your own hardware or any cloud you like.
- Every feature, including the agent
- Unlimited workspaces & mailboxes
- Community support on GitHub
- Free to fork and modify
For individuals
The hosted version with the agent, smart replies, and phishing analysis — fully included, no add-on tier.
Annual: $115/user (save 20%).
- Up to 3 connected mailboxes
- Inbox agent, smart replies, summaries
- Phishing analysis on every message
- Generous AI usage — nothing to configure
For small teams
Hosted Metis Mail with shared mailboxes, roles, and invites for your whole team.
Annual: $192/user (save 20%).
- Everything in Cloud Pro
- Shared mailboxes & team rules
- Role-based workspace admin
- Priority support, SSO on request
Bring your own AI
All Cloud features at a lower rate when you bring your own AI account to power the agent.
Annual: $58/user (save 20%).
- Connect any supported provider
- Agent uses the model you prefer
- Phishing analysis on every message
- You pay your AI provider directly
On-prem & commercial licensing
Running Metis Mail as a hosted or embedded service that competes with our paid offering requires a commercial license. Talk to us about on-prem deployments, SLAs, custom auth, and a license that fits your organization.
Email contact@astraqcyberdefence.com or grab a slot below.
Contact us