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.
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.
About Henji on Product Hunt
“AI replies that are trained to sound like you”
Henji launched on Product Hunt on June 17th, 2026 and earned 81 upvotes and 8 comments, placing #25 on the daily leaderboard. 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.
On the analytics side, Henji competes within Productivity, Writing and Artificial Intelligence — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how Henji performed against the three products that launched closest to it on the same day.
Who hunted Henji?
Henji was hunted by Yossy. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Henji including community comment highlights and product details, visit the product overview.
Yossy