Inki vs Grammarly
Grammarly checks your English. Inki is where you write.
Grammarly is a correction layer that follows you into Gmail, Word, and Google Docs. Inki is the document itself: draft in Japanese or English, edit any passage inline with AI, and keep your notes beside the text.
The short answer
These two products sit in different categories, so the choice is rarely close. Grammarly is a correction layer. It follows you into Gmail, Word, and Google Docs and fixes English as you type, without changing where you work. Inki is the place the writing happens: an editor with your notes, your drafts, and an AI assistant in one workspace, in Japanese as well as English. If you want accurate English proofreading everywhere you already write, Grammarly does that better. If producing the draft is the hard part, Inki is the closer fit.
Inki vs Grammarly
Compared as tools for getting writing done
| Inki | Grammarly | |
|---|---|---|
| What it is | A writing workspace: draft, revise, and organize documents in one place | A correction layer that runs on top of the apps you already write in |
| Works inside other apps | No. You write in Inki | Browser extension and desktop app cover Gmail, Word, Google Docs, and most web text fields |
| Real-time proofreading | Review and inline edits when you ask for them, not continuous underlines | Live underlines for grammar, spelling, and tone as you type |
| Writing in Japanese | Native Japanese and English, including business email and keigo | Spelling and basic grammar in Japanese. Rewriting and tone features cover Western European languages and Ukrainian |
| Drafting from scratch | AI assistant writes with your notes and document as context | AI prompts available on every plan, aimed mainly at improving text you already wrote |
| Long-document editing | Section-level and whole-document editing inside the editor | Full-document rewriting available on Pro and above |
| Notes and document management | Notes, drafts, and reference material live together as a project | Runs on documents that live in your other apps |
| Inline editing UI | Select a passage, describe the change, accept or discard it in context | Accept or dismiss suggestions on the underlined text |
| AI model choice | Seven models from OpenAI, Anthropic, Google, and Moonshot, plus Auto. Switch per task | Handled by Grammarly's own AI, no model picker |
| Team style enforcement | Not available | Style Guide for shared terminology and tone: one guide on Pro, unlimited on Enterprise |
| Mobile | Works in mobile browsers, no native app yet | Native iOS and Android keyboards |
| Training on your writing | Your input is not used to train external models | Personal accounts are used for AI training by default, with an opt-out, per Grammarly's published policy |
| Pricing | Free plan available, paid plans from $14/mo billed annually ($20 month to month) | Free with 100 AI prompts per month. Pro $12/mo billed annually, $30 month to month. Enterprise by quote |
A writing workspace: draft, revise, and organize documents in one place
A correction layer that runs on top of the apps you already write in
No. You write in Inki
Browser extension and desktop app cover Gmail, Word, Google Docs, and most web text fields
Review and inline edits when you ask for them, not continuous underlines
Live underlines for grammar, spelling, and tone as you type
Native Japanese and English, including business email and keigo
Spelling and basic grammar in Japanese. Rewriting and tone features cover Western European languages and Ukrainian
AI assistant writes with your notes and document as context
AI prompts available on every plan, aimed mainly at improving text you already wrote
Section-level and whole-document editing inside the editor
Full-document rewriting available on Pro and above
Notes, drafts, and reference material live together as a project
Runs on documents that live in your other apps
Select a passage, describe the change, accept or discard it in context
Accept or dismiss suggestions on the underlined text
Seven models from OpenAI, Anthropic, Google, and Moonshot, plus Auto. Switch per task
Handled by Grammarly's own AI, no model picker
Not available
Style Guide for shared terminology and tone: one guide on Pro, unlimited on Enterprise
Works in mobile browsers, no native app yet
Native iOS and Android keyboards
Your input is not used to train external models
Personal accounts are used for AI training by default, with an opt-out, per Grammarly's published policy
Free plan available, paid plans from $14/mo billed annually ($20 month to month)
Free with 100 AI prompts per month. Pro $12/mo billed annually, $30 month to month. Enterprise by quote
Pricing and features as of August 19, 2026
Choose Inki if
- You write in Japanese, or move between Japanese and English, and want real AI help in both. Japanese business email and keigo are where Inki is strongest
- The hard part is getting a draft out, not cleaning up the one you have
- You want notes, outline, and draft in one workspace instead of spread across documents and chat windows
- You prefer editing in place: select a passage, say what you want changed, and see the result in context
- You want a say in which AI model handles the work: seven models plus Auto, switchable per task
Choose Grammarly if
- You want corrections in every app you already write in. The browser extension and desktop app put the same checks in Gmail, Word, Google Docs, and most text fields on the web
- Your main need is mechanical accuracy in English: grammar, spelling, punctuation, consistency. Grammarly is built for that and does it well
- You write a lot on your phone. Grammarly ships native iOS and Android keyboards that check as you type
- Your team needs one house style. Style Guide enforces terminology and tone across writers, with one guide on Pro and unlimited guides on Enterprise
- You do not want to change where you write. Grammarly adds a layer and leaves your existing workflow untouched
Who Inki isn't for
- You want suggestions inside Gmail, Word, or Slack. Inki does not run on top of other apps, so the writing has to happen in Inki
- You already have the draft and only need a fast, reliable English proofreader
- Your organization needs brand guidelines enforced across a whole team of writers
- You do most of your writing on a phone keyboard rather than at a desk
Draft with context,
not copy-paste.
A correction layer only sees the text in the box you happen to be typing into.
Inki reads your notes, outline, and earlier sections before it writes a word, so a later paragraph stays consistent with an earlier one.
Not a layer on top.
The page itself.
Grammarly underlines what it would change as you type, on top of whatever app you are in.
In Inki you select a passage and say what you want changed, and the result waits for you to accept it: tighten phrasing, shift tone, or smooth transitions without leaving the editor.
A second reader
that never gets tired.
Mechanical accuracy is where Grammarly is strongest. Structure across a long draft is where Inki is.
One click checks pacing, clarity, and consistency across your entire project, with line-by-line suggestions you can accept or dismiss.