Henji vs Wordtune

Henji and Wordtune are both rewriters & paraphrasers tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

Henji

The core loop is fast: select a line in Slack or an email thread, hit ⌘↩, get a draft. Henji reads your past messages during setup and refines its model as you edit suggestions, carrying forward your phrasing preferences — 'Will do' over 'OK,' a warmer closing line, a softer lead-in before a request. Tone switches per recipient, so the same decline lands formally to a client and casually to a teammate. The tool works across Mac apps without requiring integrations. It sharpens with use; on day one it is a reasonable approximation, not a mirror.

Wordtune

Wordtune is a writing assistant from AI21 Labs that takes a sentence or paragraph and returns a list of context-aware rewrites, letting you pick the phrasing that fits your voice. Tone controls let you slide between formal and casual without rewriting from scratch, which saves time on anything from a cold email to a LinkedIn post. The fact-checking layer cross-references at least five sources before surfacing AI-generated claims, so you are not blindly publishing hallucinated statistics. The ceiling appears fast: Wordtune is a one-shot rewrite tool, not a drafting environment. Teams that need long-form generation, custom brand voice rules, or workflow integration with a CMS will hit its limits and go looking elsewhere.

Attribute	Henji	Wordtune
Pricing	Paid	Paid
Price	—	$6.99/mo or $9.99/mo
Free trial	No	3 days
Open source	No	No
Has API	No	Yes
Self-hosted option	No	No
Platforms	macOS	Google Chrome, Microsoft Edge, Firefox, and Arc browser extensions; web app; iOS app
Released	—	2020-10-27
Pros	Reads your existing message history during setup to establish a voice baseline from day one, so the first draft is calibrated to you rather than a generic register — which means you are not spending the first month correcting output that sounds nothing like you. Style memory updates with every edit you make, carrying forward specific phrasing preferences over time, so the tool gets more accurate the longer you use it rather than plateauing at a fixed output quality. Recipient-based tone switching — Customer, Colleague, Bestie and similar contexts — adjusts formality automatically, so you are not manually rewriting the same message four times for four different relationships. Runs on top of any Mac app via a global shortcut, so you are not locked into a specific email client or messaging platform and do not need to route messages through a separate interface. Designed specifically for short, high-friction replies like deadline negotiations and polite declines, which means it handles the messages most people avoid writing — not just the easy ones.	Context-aware rewrite suggestions match the tone and subject already in your text, so you avoid the jarring generic paraphrase that makes AI-assisted writing obvious. Tone toggle between formal and casual is a single click, which means a customer-facing team can adapt the same draft for a Slack message and a board memo without rewriting twice. Translation into natural English from ten languages — not literal translation — so non-native speakers send emails that read as written by a fluent speaker, not processed by a dictionary. Fact claims in AI-generated suggestions are cross-referenced against at least five sources before surfacing, which means you are less likely to publish a statistic that evaporates under a Google search. Chrome extension embeds directly into Gmail and Google Docs, so rewrites happen inside the tool you are already using rather than requiring a copy-paste round trip to a separate interface.
Cons	Style learning requires consistent use and active editing of suggestions to reach accuracy; teams expecting a polished personal voice from the first week will be disappointed — the model is an approximation at setup, and users who do not edit drafts get an approximation that stays frozen. The tool is Mac-only with no API, no web app, and no self-hosted option, which means Windows and Linux users are excluded entirely, and teams standardized on cross-platform tooling cannot deploy this without carving out a Mac-specific exception. Reply generation works from the fragment you type, not from reading the full thread automatically — if context buried three messages back changes what the right response is, you have to surface that context manually in your scribble or the draft misses it. The scope is limited to reply drafting for short messages; teams that also need long-form drafting, document generation, or any workflow involving file attachments will hit the tool's ceiling immediately and default to a general-purpose AI writing tool for those tasks — at which point they are maintaining two tools to cover one writing workflow.	Wordtune is a sentence-and-paragraph tool — feed it a 3,000-word article expecting a full structural rewrite and the suggestions become repetitive and disconnected. Teams with long-form content needs switch to dedicated drafting tools or general-purpose LLM interfaces that maintain document-level context. There is no brand voice configuration or style guide layer. A content team that needs every piece of output to match a specific tone profile — defined vocabulary, sentence rhythm, prohibited phrases — cannot encode those rules into Wordtune. At that scale, teams move to platforms that accept style instructions or fine-tuned models. Advanced proofreading depth and higher rewrite volume are paid-only features, so the free tier hits a usage wall exactly when a deadline pushes a writer to rewrite an entire document. Teams that run into this cap consistently either upgrade or route their volume through a general-purpose AI writing tool with no per-rewrite ceiling. No self-hosted deployment option exists, which means any text submitted — client names, draft contracts, internal strategy — passes through AI21 Labs' servers. Teams in regulated industries or under strict data governance policies cannot use Wordtune for sensitive content and move to on-premise or private-cloud alternatives instead.

Bottom line

Only Wordtune exposes a public API. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between Henji and Wordtune?

Henji is Paid, while Wordtune is Paid. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is Henji better than Wordtune?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.