Henji
AI replies that are trained to sound like you
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Yossy

Henji - AI replies that are trained to sound like you

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Henji
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Henji turns your half-formed thoughts into a finished reply that sounds like you — not a generic AI. Most AI tools think for you and hand back text in their voice, so you rewrite it anyway. Henji is the opposite: you keep the thinking, Henji just handles the writing. Select a message, drop a few keywords, and get a reply in your tone — ready to send. The more you use it, the more it learns your phrasing, your rhythm, your emoji habits. Starts with Slack. Built for anyone drowning in replies.

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Yossy
Maker
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Hi PH 👋 I'm a solo developer from Japan. I built Henji because I was tired of the same loop: ask ChatGPT for a reply, get something polished but not me, then rewrite the whole thing. The AI was doing the wrong half of the work — it was thinking for me, when all I actually needed was help putting my own thoughts into words. So Henji flips it. You stay in charge of what to say; it handles how to write it — in your voice. Under the hood it learns your real writing style over time, so replies stop sounding like an AI and start sounding like you. That "wait, this is exactly how I'd say it" moment is the whole product.
Jordyn Nguyen

@yossy Hi! Just happened to see Hanji on PH and it looks awesome. Congrats on the launch!
I message many people daily and often find myself lost for words, so this is exactly what I need.
Quick heads-up: I'm having trouble downloading it from your website. Not sure what happened, but clicking 'Download for Mac' doesn't seem to work for me. I really want to try Henji 🥹 can you check if there is anything can do to help this?

Yossy
Maker

@creativewjordyn Hey! Thank you so much for the kind words and for checking out Henji on PH — really means a lot! 🙏

And thanks a lot for flagging the download issue. Sorry about that! Something's clearly not right on our end. Let me look into it right away and I'll get back to you as soon as I've figured out what's going on.

Hang tight — I'll follow up shortly. 🙇

Yossy
Maker

@creativewjordyn Update — and good news! 🎉

So it turns out all the love Henji's been getting on PH today brought a big spike of traffic, and that overload was exactly what was breaking the download for a bit. Mystery solved! 🙏

I've pushed a fix, so it should be working now. Whenever you get a sec, could you give 'Download for Mac' another try? If anything's still off, just shout and I'll jump right back on it.

Thanks so much for your patience — can't wait for you to finally try Henji!

Dmitry Zhlobo

What a nice UI ❤️. Congrats with the launch!

What AI provider do you use?

P.S. JFYI, it seems Privacy Policy and ToS pages return 500.

Luca Capone

The vocabulary is the easy part to clone. What gives every "sounds like me" tool away is rhythm... mine runs short, then one long messy sentence, with the odd typo I'd never let a model clean up. I'm obsessive about my stuff never reading as AI, and that smoothness is the giveaway every time. Is Henji learning my rhythm and timing, or mostly my word choice?