LanguageToolFree plan
Paid from
$24.9 a month
View plans and limitsUpdated 4 September 2026 · Independent comparison
LanguageTool vs Sudowrite:
which should you use?
LanguageTool and Sudowrite, side by side. Find the one that fits what you need to do.
Find your best fitThe 30-second answer
LanguageTool is built for writing, communication & language.
Sudowrite built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
Pricing, simplified
Start free. Upgrade when you need more.
SudowritePaid only
Paid from
$19 a month
View plans and limitsThe 30-second comparison
If you only read one section, make it this one. Rows where both sides say the same thing are left out — the point is where they differ. Where each row came from is listed underneath.
| Category | LanguageTool | Sudowrite | Better fit |
|---|---|---|---|
| What it's built for | Strong across more than 30 languages rather than English alone, and it can be self-hosted, which almost nothing else in this category offers. | Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces. | LanguageTool |
| Fit for writing, communication & language | Built for this | Strong fit | LanguageTool |
| Free plan | Yes. Free tier covering basic grammar and spelling | No. Paid from the start. | LanguageTool |
| Cheapest way to pay | $24.9 a month. | $19 a month. | Sudowrite |
| What the paid tiers cost |
|
| Tie |
| What to watch out for | Owned by the same company as QuillBot since 2023. Month to month costs more than four times the annual rate, and there are four payment intervals to pick between, so the interval matters more than the tier. Prices are quoted inclusive of VAT. | Paid from the start, though the trial takes no card. The tiers differ mainly by monthly credits — 225,000, one million and two million — rather than by features, so the question is how much you write. Prose has a recognisable register you will want to edit out. | Tie |
| Who it is usually for | students, working professionals, researchers | working professionals | Tie |
| Runs on your own machine | Can be run on your own machine, so the material never leaves it. | Hosted service only — your material goes to their servers. | LanguageTool |
| What it asks of you | Expects some technical comfort to get going. | No setup — it works in a browser. | Tie |
| Made by | Learneo — Redwood City, US. | Sudowrite — San Francisco, US. | Tie |
LanguageTool is ahead on 4 of the 10 rows compared, 4 of them about how well it does the job itself, against 1 to Sudowrite. That is a clear lead rather than a tiebreaker.
LanguageTool
Strong across more than 30 languages rather than English alone, and it can be self-hosted, which almost nothing else in this category offers.
✓ The job is mainly writing, communication & language
✓ Strong across more than 30 languages rather than English alone, and it can be self-hosted, which almost nothing else in this category offers.
✓ You want to start without paying anything
✓ The material cannot leave your own machine
Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
Sudowrite is the better answer when the job is what it was built for rather than what the pick above does broadly.
✓ Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
✓ You want the cheaper paid plan, $19 against $24.9
✓ You would rather not configure anything first
✓ It works in a browser with nothing to set up
How we know
Every row that separated these two, and where it came from. Nothing here is a hands-on test — if a line rests on a vendor’s own pricing page, it says so and links it.
| Row | Favours | Weight | Where it came from |
|---|---|---|---|
| What it's built for | LanguageTool | How well it does the job | From this site’s own catalogue record for each product — compiled by hand, not imported. How a product gets listed |
| Fit for writing, communication & language | LanguageTool | How well it does the job | Both products are listed under writing, communication & language in the catalogue, and this is the fit recorded against each listing. Everything listed under writing, communication & language |
| Free plan | LanguageTool | How well it does the job | From each vendor’s own pricing page. Dates and pages are listed below. |
| Cheapest way to pay | Sudowrite | Everything else | From each vendor’s own pricing page. Dates and pages are listed below. |
| Runs on your own machine | LanguageTool | How well it does the job | From this site’s own catalogue record for each product — compiled by hand, not imported. How a product gets listed |
The prices
LanguageTool. Read by hand off languagetool.org on 4 September 2026. It is not on the monthly re-check, so confirm there before paying. languagetool.org/premium
Sudowrite. Read by hand off sudowrite.com on 4 September 2026. It is not on the monthly re-check, so confirm there before paying. sudowrite.com/pricing
The ratings
The category these two share. Writing, Communication & Language — both are listed there in the catalogue, and the fit recorded against each listing is a judgement made here, by hand.
The nine-category grid below. Derived from what each product is listed for, by one script, once per build — so the same pair always reads the same. It is a derivation, not a review.
What this is not
Neither product was run side by side to produce this page. Nobody was paid to appear on it and nothing here is ranked by commission.
To put the same question to both and read the answers yourself, run them side by side — that is a live test, and this is not.
Choose based on what you’re doing
All ten categories, including the ones where neither of these is the answer. These ratings are derived from what each product is listed for, not from running it — a rating here is a reading of the record, and the record is linked.
01
General-Purpose AI Assistants
Questions, brainstorming, explanations, everyday tasks, decision-making, general advice.
LanguageTool
Not a good fitSudowrite
Not a good fitBest choice: Neither
02
Search, Research & Academics
Web research, deep research, books, academic papers, citations, news, fact-checking.
LanguageTool
Not a good fitSudowrite
Not a good fitBest choice: Neither
03
Writing, Communication & Language
Emails, reports, essays, editing, summarizing, translation, presentations.
LanguageTool
Built for thisSudowrite
Good fitBest choice: LanguageTool
04
Coding, Data & Technical Work
Programming, debugging, data analysis, spreadsheets, math, engineering, technical research.
LanguageTool
Bad fitSudowrite
Bad fitBest choice: Neither
05
Business, Finance & Professional Work
Business strategy, investing, market research, legal, sales, HR, accounting, consulting.
LanguageTool
Not a good fitSudowrite
Not a good fitBest choice: Neither
06
Image & Design
Image generation, photo editing, logos, graphics, product design, advertising creatives.
LanguageTool
Bad fitSudowrite
Bad fitBest choice: Neither
07
Video
Video generation and editing, clipping, subtitles, avatars, animation and motion capture.
LanguageTool
Bad fitSudowrite
Bad fitBest choice: Neither
08
Audio, Voice & Music
Voice generation, transcription, music, dubbing, sound cleanup and podcast production.
LanguageTool
Bad fitSudowrite
Bad fitBest choice: Neither
09
Marketing & Content Creation
Social media, SEO, advertising, copywriting, content ideas, scripts, brand development.
LanguageTool
Not a good fitSudowrite
Not a good fitBest choice: Neither
10
Productivity, Automation & Personal Life
AI agents, workflows, scheduling, meetings, organization, shopping, travel, personal finance.
LanguageTool
Not a good fitSudowrite
Not a good fitBest choice: Neither
Strong across more than 30 languages rather than English alone, and it can be self-hosted, which almost nothing else in this category offers.
by LearneoThe job is mainly writing, communication & language
Strong across more than 30 languages rather than English alone, and it can be self-hosted, which almost nothing else in this category offers.
You want to start without paying anything
The material cannot leave your own machine
Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
San Francisco, USBuilt for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
You want the cheaper paid plan, $19 against $24.9
You would rather not configure anything first
It works in a browser with nothing to set up
Pricing, simplified
The plans people actually compare, read from each vendor’s own page.
PricingSimple, up-to-date plan overview.
Sudowriteby SudowriteFree version
LanguageTool
Yes — Free plan availableFree tier covering basic grammar and spelling
Sudowrite
No — paid from the startPaid from the start
Individual plans
LanguageTool
Premium
$24.90 / month$16.63 / month (quarterly)$5.83 / month (annual)
Teams
$11.07 / month$11.07 / month (annual)
Sudowrite
Hobby & Student
$19 / month$10 / month (annual)
Professional
$29 / month$22 / month (annual)
Max
$59 / month$44 / month (annual)
Business plans
LanguageToolNot sold to teams
SudowriteNot sold to teams
Enterprise
LanguageToolNot published
SudowriteNot published
Tell us what you use AI for
Pick your main job and the verdict below changes to match. Every answer is on the page already, so this works as a reader, not a lookup.
The verdict for that job
LanguageTool
LanguageTool. It is built for writing, communication & language; Sudowrite does it well without it being its focus; only LanguageTool has a free plan; Sudowrite is cheaper to start paying for, $19 against $24.9.
10 rows compared
Frequently asked questions
Is LanguageTool or Sudowrite better?
LanguageTool is ahead on 4 of the 10 rows compared, 4 of them about how well it does the job itself, against 1 to Sudowrite. That is a clear lead rather than a tiebreaker. LanguageTool is built for writing, communication & language; Sudowrite does it well without it being its focus; only LanguageTool has a free plan; Sudowrite is cheaper to start paying for, $19 against $24.9. LanguageTool: Strong across more than 30 languages rather than English alone, and it can be self-hosted, which almost nothing else in this category offers. Sudowrite: Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
Is LanguageTool or Sudowrite cheaper?
Sudowrite — paid plans start at $19 a month against $24.9 a month.
Do LanguageTool and Sudowrite both have free plans?
LanguageTool does — Free tier covering basic grammar and spelling. Sudowrite does not.
What should I watch out for?
LanguageTool: Owned by the same company as QuillBot since 2023. Month to month costs more than four times the annual rate, and there are four payment intervals to pick between, so the interval matters more than the tier. Prices are quoted inclusive of VAT. Sudowrite: Paid from the start, though the trial takes no card. The tiers differ mainly by monthly credits — 225,000, one million and two million — rather than by features, so the question is how much you write. Prose has a recognisable register you will want to edit out.
Read more
LanguageTool
What it is for, who makes it, what it costs and what to use instead.
Sudowrite
What it is for, who makes it, what it costs and what to use instead.
Best AI for Writing
Emails, reports, essays, editing, summarizing, translation, presentations.