Text selection to reply draft
Select text in Slack, email, or another app and generate a reply draft from it instead of starting from scratch.
Henji
Henji is a macOS app that turns scribbles or keywords into reply drafts in your own voice for fast, context-aware chat and email responses.
Overview
Henji is a macOS app that drafts replies from quick scribbles or keywords in your own writing style. It is built for the everyday back-and-forth of chat and email, where a short note needs to become a complete response without sounding generic.
The product’s core promise is to make replying feel more like continuing your own thread than using a template. It can read past messages during setup, adapt as you edit its outputs, and adjust tone for different recipients such as customers, coworkers, or friends. The site shows it working across apps like Slack, LINE, Gmail, and Messages, and says it works in almost all Mac apps.
What Henji does
Keyboard-first workflow
Use the ⌘⏎ shortcut to launch Henji quickly while you are already working in another Mac app.
Initial style learning
Reads past messages during setup so the first drafts already reflect your phrasing and tone.
Ongoing personalization
Learns from your edits and reuses those corrections later, so the output can adapt over time.
Recipient-based tone control
Switch tone by recipient type, such as customer, colleague, or friend, so the same core message can sound different in context.
Works across Mac apps
Designed to work across many Mac apps rather than only inside one chat or email client.
Common ways to use Henji
Fast everyday replies
Turn a rough thought into a polished reply when you need to answer quickly in Slack or email without writing a full draft yourself.
Internal team messages
Keep internal threads short and readable by generating a response that stays warm but only includes the essentials.
Polite pushback
Decline or negotiate a deadline, request, or change while keeping the tone respectful and the relationship intact.
Audience-specific tone shifts
Adjust the same message for a customer, manager, or friend by changing the recipient tone rather than rewriting the whole reply.
Longer-term voice matching
Use your earlier edits and phrasing to keep later replies consistent with how you actually write over time.
Pros and Cons
Pros
- Turns short notes into replies in the user’s own voice instead of producing a generic draft.
- Supports a quick selection-and-shortcut workflow that fits existing chat and email habits.
- Learns from past messages and from later edits, which should help the output feel closer to the user over time.
- Can vary tone for different recipients, which is useful when the same message needs to sound formal, neutral, or casual.
- Works across many Mac apps, so it is not limited to a single messaging platform.
Cons
- The public pages do not provide detailed pricing or plan information; the pricing URL returns a 404.
- The help page lists questions about integrations, API, voice input, and Windows support, but the public site does not confirm those features are available.
- Feature details are presented through examples and help topics rather than a full technical specification or integrations list.
FAQ
What is Henji?
Henji is a macOS app that turns short scribbles or keywords into replies written in your usual voice.
Which apps does it work with?
The site says it works with almost all Mac apps, and gives examples such as Slack, LINE, Gmail, and Messages.
How does Henji create replies?
Henji starts from a selected line or a quick input, then drafts a reply in your style. The help page also notes a shortcut-based desktop app workflow.
Can I use it for free?
The home page says you can start free, with no credit card required.
Does Henji support team use?
The help page includes support for team and business plans as a future question, but the public page does not confirm a released team plan.
Quick Facts
- Category
- Productivity / AI Writing
- Platform
- macOS
- Primary job
- Draft replies from scribbles or keywords in the user’s voice
- Typical contexts
- Chat and email replies
- Scope
- Works in almost all Mac apps
- Source domain
- henji.ai
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