Private AI email triage for Gmail
Tenku
A gateway to the empty sky.
Tenku sorts your Gmail by what actually matters, gives each message a one-line reason it landed there, and lets you clear the inbox to zero without leaving the keyboard.
What Tenku is
Tenku reads your Gmail and sorts it by importance, giving every message a one-line reason it landed where it did. You clear the few that matter, archive the rest, and reach zero — all from the keyboard. It learns from your corrections as you go.
It runs entirely on your own machine. There is no Tenku server, no account, and no sign-up — you install the app, connect your own Google account, and bring your own AI key. This website exists only to explain what Tenku does and how it handles your data.
Why it's different
Your mail stays on your machine. Your AI key staysyours.
Most email tools route your inbox through their own servers. Tenku doesn't. Your mail lives in an encrypted cache on your own computer, Gmail stays the source of truth, and the only AI that ever sees your mail is the one you connect with your own API key. Nothing is bundled, nothing is sold or shared, and there is no tracking of any kind.
What you get
- AI triage
Every message gets an importance level and a one-line reason it landed there. Correct it once, and Tenku learns your preferences for next time.
- Keyboard-first
Archive, star, snooze, reply, and forward without touching the mouse. Undo takes back mistakes. Clear your inbox in minutes.
- Stays on your machine
Your mail lives in an encrypted cache on your own computer. Gmail stays the source of truth — Tenku never becomes a second place your mail can get lost.
- Bring your own AI key
Tenku runs on your own AI API key — nothing is bundled or resold. It connects to Anthropic's Claude today, with Google, OpenAI, and more on the way.
- Always in your control
Pause the AI, or pause all changes to Gmail, with a single switch. Your actions sync back to Gmail reliably, so nothing happens quietly behind your back.
- Never destructive
Tenku only surfaces what matters. It never hides mail, and never deletes or changes things in bulk.
天空 · tenkū
Inbox zero.
Tenku means “sky.” A clear inbox is clear sky.