Henji
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What is Henji?
Henji is a macOS application that transforms your quick scribbles, half-formed thoughts, or keywords into complete replies written in your own unique voice. Unlike generic AI tools that think for you and return text in their own voice, Henji keeps you in control of the thinking while it handles only the writing. The app installs in just 30 seconds with no credit card required and works across over 2 million Mac apps, including Slack, Gmail, and email.
The core feature is its ability to learn your personal writing style by reading your past messages during setup. It picks up your phrasing, rhythm, emoji habits, and even how you tend to open messages or use bullet points. The more you use Henji, the more it learns your turns of phrase and remembers your edits, making every revision improve its accuracy. It also includes multiple tone agents like
Henji pricing
Pricing model: Freemium
Start free with no credit card required. The website states you can start free and make replying easy. Installs in 30 seconds with no credit card required. Specific paid plan pricing details and what is included in free versus paid tiers are not clearly detailed on the website.
Henji pros
- Turns quick scribbles into complete replies in your own voice
- Learns your phrasing, rhythm, and emoji habits from past messages
- Works across over 2 million Mac apps including Slack and Gmail
- Installs in just 30 seconds with no credit card required
- Multiple tone agents adjust automatically per recipient
- Launch by selecting text with ⌘⏎ shortcut
- Remembers your edits and carries them forward
- Sound like yourself from day one after setup
- Short, to-the-point replies without bloated boilerplate
- Orchestrates GPT, Gemini, and Claude together routing to best model
- Switch between Customer, Colleague, and Boss agents easily
- Gets better the more you use it
- Starts with Slack integration
- Warm tone while keeping messages essential for internal threads
- Can decline or negotiate while keeping relationships warm
Henji cons
- Only available for macOS, no Windows or Linux support
- Does not yet support deliberate typos you might keep intentionally
- Download button had traffic overload issues at launch
- Privacy Policy and ToS pages returned 500 errors initially
- Works in almost all apps but not necessarily all 2 million
- No mobile app version for iOS or Android
- Requires reading past messages during setup which may concern some
- Free tier limitations not clearly specified on website
Frequently asked questions about Henji
What is Henji?
A macOS app that turns your quick scribbles or keywords into replies written in your own voice. The more you use it, the more it sounds like you.
How does Henji learn my voice?
It reads your past messages during setup and learns how you write right away. As you go, it picks up your turns of phrase, remembers your edits, and carries them forward. Every edit makes it more like you.
What apps does Henji work with?
It works across over 2 million Mac apps and functions in almost all of them. It starts with Slack integration and also works with Gmail and email.
How do I launch Henji?
Select a line in Slack or email for an instant draft, then fire it up with the ⌘⏎ shortcut. The same steps work on top of any app.
What are the tone agents?
You can switch between agents like Customer, Colleague, or Boss. The tone adjusts automatically per recipient, from formal to casual effortlessly.
Does Henji think for me?
No, Henji is the opposite of generic AI. You keep the thinking, Henji just handles the writing. Most AI tools think for you and hand back text in their voice, but Henji lets you select a message, drop keywords, and get a reply in your tone.
What AI models does Henji use?
Henji orchestrates GPT, Gemini, and Claude together, routing to the best one for each task.
Does Henji learn my rhythm and timing?
Yes, Henji learns structure not just words. It picks up how you tend to open messages, how long your first line usually runs, whether you use bullet points or keep everything in one long sentence. It also shifts based on who you're replying to.
Can Henji leave deliberate typos in my text?
Not yet. Henji does not currently support deliberately leaving in mistakes you might keep on purpose. The model's instinct is to smooth everything, and this is a recognized gap that has been added to the feature inbox.
Is there a free tier?
Yes, you can start free with no credit card required. The app installs in 30 seconds and you can make replying easy without paying upfront.