Features
Everything it does for you.
Posthorn isn’t a faster inbox — it’s a personal chief of staff that reads your whole day, acts on it, and keeps it private.
Reads everything
One agent across every inbox
- Gmail — all your accounts, not just one
- Google Calendar — yours, plus calendars you only watch
- Slack — every workspace, DMs and channels
- iMessage & Apple Notes — read locally on your Mac
- Google Chat & Telegram
- Even your code repos — what actually shipped
Briefs you
The few things that need you — and why
- Short briefs morning, midday, and evening (urgent off-hours)
- Every item carries a one-line “why this matters now”
- Connects pings into storylines, not loose fragments
- A single “one thing” when that’s all there’s time for
- Never repeats what it already told you today
- Quiet by default — silence is a valid brief
Acts for you
It handles the busywork
- Drafts replies in your voice — you review and send
- Archives, files, and mutes repeat senders for good
- Snoozes and resurfaces at the right time
- Turns “can you…” into tracked tasks
- Checks your calendar and proposes RSVPs
- Risky actions wait for your one-tap approval
Learns you
It gets sharper the more you use it
- Remembers your people, projects, rules, and conventions
- Teach it in plain language — corrections stick
- Fix any briefing item’s framing in one tap
- Everything it learns is visible, with undo
- No tagging, no rules to build — it learns by watching
Private by design
Your data never leaves your devices
- Runs on your Mac; your data lives in your own database
- Bring your own AI key — or run a fully local model
- No selling, no training on your data, no ads
- Optional end-to-end-encrypted sync to iOS
- Disconnect any account, export everything, anytime
Put it to work on your day.
Free during the private beta, on Mac.