AI Compare · AI tools
LanguageTool: plans, prices, strengths and limits
LanguageTool Basic is free on the LanguageTool website, with usage limits. LanguageTool Premium costs $24.90 for one month, $49.90 for three months, $69.90 for a year or $119.80 for two years, each paid up front, and adds the browser extension, desktop apps and Word add-on.
Prices for United States, before sales tax Data release 2026.11.07-2, Nov 7, 2026 Rules 2.5.0
- Made by
- Learneo, Inc. (LanguageTool)
- Individual plans
- 2, one free
- Paid plans
- $24.90 a month
- Facts checked
- Nov 7, 2026
Hidden gem A smaller tool fewer people know yet. We list it after the main picks for each job its maker documents; we have not tested it. How we choose them
Quick verdict
LanguageTool checks grammar, spelling, punctuation and style in more than 30 languages and paraphrases sentences with AI; it calls itself an AI editing tool rather than an AI writing tool. LanguageTool Basic is free, but only on languagetool.org: you get basic grammar, style and spelling checks and the Paraphrasing Tool, with usage limits that LanguageTool does not put a number on. LanguageTool Premium adds enhanced grammar, punctuation and style checking, with more than 20,000 additional checks in English, German, French, Spanish, Dutch, Polish and Portuguese, unlimited AI paraphrasing (more formal, more fluid or shorter), a personal style guide, the browser extension, Windows and macOS apps, the Word add-on and an iOS app. Premium is $24.90 for one month, $49.90 for three months, $69.90 for a year (about $5.83 a month by our calculation) or $119.80 for two years. LanguageTool's page shows local currency, so these US prices come from the plan data the page loads; whether tax is added is not stated for US buyers.
Two terms decide whether it fits. LanguageTool's terms say the services "may only be used for personal, non-commercial purposes, except as otherwise provided in writing", on Basic and Premium alike, so using it for paid work is documented as not offered unless LanguageTool agrees in writing or its Help Center says otherwise. On training, its owner Learneo says it does not use inputs from any LanguageTool user, individual or team, to train its language algorithms or models, so there is nothing to switch off.
LanguageTool does not name the AI models it uses, and its own pages disagree on how long one Premium text can be. This verdict rests on what LanguageTool documents, not on our tests, which we have not run yet.
Strengths and limits
Strengths
- No training on your textLearneo's privacy policy says it does not use inputs from any LanguageTool user, on Individual or Team plans, to train its language algorithms or models. No opt-out is needed on Basic or Premium.
- Grammar and style in many languagesLanguageTool checks more than 30 languages. Premium adds more than 20,000 additional checks in English, German, French, Spanish, Dutch, Polish and Portuguese, plus a personal style guide.
- Unlimited paraphrasing on PremiumPremium lists unlimited sentence paraphrasing by AI, to make a sentence more formal, more fluid or shorter. Basic has the Paraphrasing Tool on the website with usage limits.
- Works across browsers, desktop and Word on PremiumPremium includes extensions for Chrome, Edge, Firefox, Safari and Opera, which check as you type in Gmail and Google Docs, plus Windows and macOS apps, a Word add-on and an iOS app. Outlook works through the Windows desktop app.
- Low yearly priceThe one-year Premium plan is $69.90 paid up front, about $5.83 a month by our calculation, against $24.90 for a single month. A two-year plan costs $119.80.
Limits
- Personal, non-commercial use onlyPlan limit. LanguageTool's terms say the services may only be used for personal, non-commercial purposes, except as otherwise provided in writing, in the Help Center or by law. This applies to Basic and Premium; Team plans exist but are not covered here.
- Basic is website onlyPlan limit. Free users get the Grammar Checker and Paraphrasing Tool only on languagetool.org, with usage limits. The browser extension, which brings LanguageTool into Gmail and Google Docs, is now Premium only.
- Premium text limit: pages disagreeConflict. The Premium page says up to 150,000 characters per text field, while a help article on the Premium-only extension says texts of up to 100,000 characters.
- US prices need careUnverified point. LanguageTool shows prices in local currency, and its help center lists euro prices only. The US prices come from the plan data the Premium page loads, and the page footer's "All prices incl. VAT" is written for EU buyers.
- Gaps in what is documentedNot verified. LanguageTool does not name its AI models or the per-text limit on Basic. Excel and PowerPoint support, a data export and whether the editor shows ads are not stated; Google Sheets is not yet supported.
Based on what Learneo, Inc. (LanguageTool) documents for each plan, not on our tests.
Who it suits
A good fit if you
- Personal writing in English and the other 30+ languages LanguageTool checks
- Keeping your text out of model training without changing a setting
- Paraphrasing sentences to sound more formal, more fluid or shorter, unlimited on Premium
- Checking as you type in Gmail, Google Docs and Word, on Premium
Look elsewhere if you
- Paid or client work: the terms limit use to personal, non-commercial purposes
- Drafting whole texts from a prompt: LanguageTool calls itself an editing tool
- Checking spreadsheets: Google Sheets is not yet supported
- Using the browser extension for free: it is Premium only
Plans and prices
| Plan | Monthly | Yearly | Checked |
|---|---|---|---|
| LanguageTool Basic | Free | Nov 7, 2026 | |
| LanguageTool PremiumThe 1-year plan is billed once at $69.90; 3-month ($49.90) and 2-year ($119.80) terms also exist. | $24.90 a month | $69.90 a year | Nov 7, 2026 Source |
Prices for United States, before sales tax unless a plan says otherwise. A yearly plan is paid up front and is not cancel-any-time.
Features by plan
What Learneo, Inc. (LanguageTool) documents for each plan. A hatched mark means we could not verify it, which is not the same as "not offered".
| Feature | LanguageTool Basic | LanguageTool Premium |
|---|---|---|
| Models and limits | ||
| Top models included | Unclear | Unclear |
| Context window | Unclear | Unclear |
| Models from several companies | Unclear | Unclear |
| General-purpose assistant | Unclear | Unclear |
| Files and data | ||
| File and document uploads | Unclear | Unclear |
| Writing and slides | ||
| Grammar and spelling checks | Yes | Yes |
| Paraphrasing and tone changes | Yes | Yes |
| Integrations and agents | ||
| Connectors to other apps | Unclear | Unclear |
| Inside Gmail | No | Yes |
| Inside Google Docs | No | Yes |
| Inside Google Sheets | No | No |
| Inside Word | Unclear | Yes |
| Inside Excel | Unclear | Unclear |
| Inside PowerPoint | Unclear | Unclear |
| Inside Outlook | Unclear | Yes |
| Privacy and control | ||
| Opt out of model training | Yes | Yes |
| Export your data | Unclear | Unclear |
| Shows ads | Unclear | Unclear |
| Rights and licensing | ||
| Commercial use of outputs | No | No |
| Apps and extras | ||
| Cloud storage included | Unclear | Unclear |
| Apps | Yes | Yes |
| Usage included | Yes | Unclear |
The details and sources of every row are in Compare two AIs and the data release.
What it documents for each use
- Writing & Content Fix grammar and tone in my writing
- Business & Productivity Use AI inside Gmail · Use AI inside Google Docs · Use AI inside Word · Use AI inside Outlook
A use is listed when at least one plan documents every feature a task needs. Answer quality is a separate question: see below.
Using it day to day
On Basic, LanguageTool works only on languagetool.org, where you paste text into the Grammar Checker or Paraphrasing Tool. Premium adds browser extensions for Chrome, Edge, Firefox, Safari and Opera, which check your writing as you type on sites like Gmail and in Google Docs, and LanguageTool lists office plugins for Google Docs, Word, Apple Pages and LibreOffice. There are Windows and macOS apps, an iOS app and a Word add-on; Outlook works through the Windows desktop app or by a shortcut from the Windows and macOS editors. The LanguageTool Editor can import Word documents and keep their formatting. Google Sheets is not yet supported, and Excel and PowerPoint are not mentioned.
Basic's checks and paraphrasing come with usage limits that are not given as numbers. Premium lists unlimited paraphrasing, with a per-text limit of 150,000 characters on the Premium page or 100,000 in a help article. Premium is sold for one month, three months, one year or two years; Team plans are sold separately.
Privacy, data and ads
Learneo, which owns LanguageTool, says it does not use inputs from any LanguageTool user, on Individual or Team plans, to train its language algorithms or models, so there is no training setting to change. We found no description of a data export. Whether the LanguageTool editor shows ads is not verified; Learneo's privacy policy says it may serve ads on its Services or on external services.
Read the vendor's own page: LanguageTool privacy and data controls. We make no legal or compliance claim.
Test results
We have not tested LanguageTool yet, so this page makes no claim about answer quality, and we show no example outputs. Run the same kit in it and in the alternatives, in your own account:
- Summarize a report with traceable facts
- Analyze a spreadsheet and get the numbers right
- Edit an email without losing a detail
- Diagnose and repair a small program
- Research a question with sources that support the answer
- Make sense of documents that disagree
- Research a current question within a date window
- Edit an article without changing its facts
- Turn project notes into a report that agrees with itself
- Implement a small specification
- Refactor code without changing what it does
- Make a picture that follows a detailed brief
- Put exact text into a graphic
- Change one thing in a picture and nothing else
- Make a short clip that follows a brief
- Make a song that sings your lyrics exactly
- Read a script with names, numbers and abbreviations
- Design a logo with an exact name
Getting started
- Try LanguageTool Basic on languagetool.org with a page of your own writing, in the languages you use.
- Before you rely on it for work, read the terms: use is limited to personal, non-commercial purposes unless LanguageTool agrees otherwise in writing.
- If you want checks in Gmail, Google Docs or Word, choose Premium. The one-year plan at $69.90 costs less than three single months at $24.90; check the currency and any tax at checkout.
- For long documents, keep each text under 100,000 characters until you know which of LanguageTool's two stated limits applies.
- Compare LanguageTool with DeepL Write, Grammarly and other tools on our tools page, and read how we check vendor claims.
Your fit
Tell Find my AI what you do and what matters; it checks every plan of LanguageTool against your priorities, next to the alternatives.
Alternatives
- DeepL Write DeepL Write Pro, an add-on to DeepL Individual at $19.98 a month together, is covered by DeepL Pro terms for business or private use, and DeepL says Write Pro texts are never used to train its models. About DeepL Write
- Grammarly Grammarly's Terms say you own all right, title and interest in your content with no plan restriction stated, and its free plan checks as you type in the browser extension, which LanguageTool keeps for Premium. About Grammarly
- Paperpal For academic writing, Paperpal says documents and uploads are never used for model training on any plan, and its Free plan includes 200 grammar edits a month with a Word add-in and Google Docs support. About Paperpal
Recent changes
- LanguageTool Premium added
- LanguageTool Basic added
Every change is in the change log.
Questions
Is LanguageTool free?
Yes. LanguageTool Basic is free on languagetool.org, with basic grammar, style and spelling checks and the Paraphrasing Tool, within usage limits LanguageTool does not quantify. The browser extension and add-ins need Premium.
How much does LanguageTool Premium cost?
LanguageTool Premium is $24.90 for one month, $49.90 for three months, $69.90 for a year or $119.80 for two years, each paid up front. LanguageTool shows local currency, so check the price at checkout.
Can I use LanguageTool for work?
LanguageTool's terms say its services may only be used for personal, non-commercial purposes, except as otherwise provided in writing, in the Help Center or by law. That applies to Basic and Premium.
Does LanguageTool use my text to train AI?
No. Learneo, which owns LanguageTool, says it does not use inputs from any LanguageTool user to train its language algorithms or models.
Does LanguageTool work in Google Docs and Word?
On Premium, yes: the browser extension works in Google Docs and Gmail, and there is a Word add-on. On Basic, LanguageTool works only on its website; whether free users can use the Word add-in is not stated.
What is the character limit in LanguageTool Premium?
LanguageTool's pages disagree: the Premium page says up to 150,000 characters per text field, and a help article says 100,000 characters.
Sources
10 official pages, checked Nov 7, 2026. This page was written by the What the tech desk with AI assistance from the facts in our data release; no company paid for or reviewed it.
- Is LanguageTool Considered AI Writing?LanguageTool (Learneo, Inc.)
- What is the LanguageTool Editor?LanguageTool (Learneo, Inc.)
- LanguageTool General Terms and ConditionsLanguageTool (Learneo, Inc.)
- What features are available in the new premium-only version of the LanguageTool browser extension?LanguageTool (Learneo, Inc.)
- Which websites and applications are supported by LanguageTool?LanguageTool (Learneo, Inc.)
- Learneo Privacy PolicyLanguageTool (Learneo, Inc.)
- Premium - LanguageToolLanguageTool (Learneo, Inc.)
- Where can I access the LanguageTool Writing Assistant?LanguageTool (Learneo, Inc.)
- Do you offer an add-on for Outlook?LanguageTool (Learneo, Inc.)
- Recurly plan data loaded by languagetool.org/premium (US plan code)LanguageTool (Learneo, Inc.)
About this page
- Published by
- What the tech, Helsinki, Finland
- Author
- What the tech
- Reviewed by
- Peyman Khosravani
- Review scope
- Checked that this page matches the facts in data release 2026.11.07-2: a check against documented sources, not a hands-on test of the product.
- Evidence
- Facts documented by each company, each linked to its official source and dated. Test results appear only where an editor ran the test.
- Data release
- 2026.11.07-2, Nov 7, 2026
Product ownership is separate from publication: What the tech publishes this page; Learneo, Inc. (LanguageTool) supplies LanguageTool. Official LanguageTool website. Product names and logos do not imply endorsement of this publication.