Your quick scribble,in your usual voice.
The more you use it, the more it sounds like you. Chats and email — replies get easier every day.
hey! quick one about the deck — any chance it can land today? no worries if it's tight, just let me know 🙏
Fast and to the point for the team
Internal threads keep their pace — warm, but only the essentials.
Not AI-ish. You-ish.
Turning down "Can you get this doc to me by tomorrow?" — politely, while negotiating the deadline.
Learns your voice
Picks up your phrasing from past threads.
Short, to the point
No bloated boilerplate — just a line they can read fast.
Says it without friction
Decline or negotiate while keeping the relationship warm.
So, here's what makes Henji click.
Launch by just selecting text
- Select a line in Slack or email for an instant draft
- Fire it up with the ⌘⏎ shortcut
- Same steps on top of any app
Sound like yourself from day one
- Reads your past messages during setup
- Learns how you write, right away
- Reply in your voice from day one

Gets better the more you use it
- Learns your turns of phrase as you go
- Remembers your edits and carries them forward
- Every edit makes it more like you
- Prefers “Will do” over “OK”
- Softens the lead-in before a request
- Ends on a warmer note
The right "you" for every recipient
- Switch agents like "Customer" or "Boss"
- Tone adjusts automatically per recipient
- From formal to casual, effortlessly
I'm sorry for the trouble. I'll confirm the cause and report back on the status by end of day.
Heads up, they flagged that bug's still not fixed. I'll dig into the cause and get it sorted today.
no bc the bug's still not fixed?? i'm so done 😭💔 lemme jump on it rn, sorted by today, hang tight bestie 🫶💖
It doesn't care which app you use.
Over 2 million Mac apps — and it works in almost all of them.
Frequently asked questions
Start free, and make replying easy.
Installs in 30 seconds — no credit card required.
Henji