The LanguageTool Insider’s Guide
Everything we know about LanguageTool in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
LanguageTool
The Insider’s Guide
Grammar and style checker for more than 30 languages
Every plan, grade, refund rule and rival among writing tools, read from LanguageTool’s own pages.
Made by LanguageTooler GmbH · checked Oct 5, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from LanguageTool’s own pages, its app-store listings and our grades. Every fact in it is on LanguageTool’s page too, where it is kept up to date. Checked Oct 5, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.8
GPA, above 43 of the 69 other writing tools we grade
LanguageTool is a grammar, spelling and style checker that covers more than 30 languages and dialects and includes an AI paraphrasing tool. It works through browser add-ons, office and email plugins, a web editor and apps for Windows, macOS and iOS. It began in 2003 as an open-source project, and its core checking technology is still published as open-source software.
To get you started, here are 9 things to know about LanguageTool, taken from its own pages and our grades.
Hosting your own server is an option, not a requirement.
- 1
Best for grammar checking in more than one language
LanguageTool is a grammar checker for more than 30 languages that plugs into browsers, Word, Google Docs and LibreOffice, with an open-source core.
- 2
Paid plans start at $4.99 a month
As its pricing page puts it: $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually.
- 3
There is a free plan
Basic plan: grammar, punctuation and spelling checks in 30+ languages on up to 2,000 characters per text field, with limited Picky Mode and 3 AI rephrasings a day.
- 4
It runs on 4 platforms
Web, macOS, Windows and iOS, with a browser extension too.
- 5
Grammar, spelling and style checks
Checks grammar, punctuation, spelling, casing and style. Premium adds more than 20,000 extra checks for English, German, French, Spanish, Dutch, Polish and Portuguese.
- 6
AI paraphrasing
Rephrases a sentence to be more formal, more fluid or shorter. Basic accounts get 3 rephrasings a day and Premium removes the limit.
- 7
Long-text checking
Premium checks up to 150,000 characters per text field, against 2,000 on the Basic plan.
- 8
A 2.8 GPA, above 43 of 69
That is against the other writing tools we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
Nothing LanguageTool does is plain enough to make in a weekend. The 6 things listed below take a company.
LanguageTool at a glance
- Pricing
- Free plan, from $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web, macOS, Windows, iOS, Browser extension
- Made by
- LanguageTooler GmbH, since 2003
- Category
- Writing Tools
- Our grade
- 2.8 GPA, good
The report card
Best for grammar checking in more than one language
LanguageTool is a grammar checker for more than 30 languages that plugs into browsers, Word, Google Docs and LibreOffice, with an open-source core. Premium is $69.90 a year, but $24.90 if you pay monthly. The free plan checks only 2,000 characters at a time with 3 AI rephrasings a day, there's no Premium trial, and no Android app is listed.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | Premium is $69.90 billed annually, about $5.83 a month, dropping to $4.99 a month if you commit to two years, which is inside this category's cheaper quarter at $5.00. Pay by the month and it's $24.90, more than four times the annual rate, so don't. |
| Free plan and trial | C | Basic is free for as long as you like and checks grammar, punctuation and spelling across 30-plus languages. But it stops at 2,000 characters per text field, which any real document walks past, Picky Mode is limited and AI rephrasing is 3 a day. No trial of Premium either. |
| Features | B | It covers the checking job in full: grammar, spelling, punctuation and style in 30-plus languages, 20,000 extra checks on Premium, texts to 150,000 characters, AI paraphrasing and a style guide. What it hasn't got is the extras its rivals carry, like Grammarly's plagiarism and AI-text checks or QuillBot's summarising. |
| Ease of use | B | No store rating on record, but there's nothing to set up: add it to your browser, Word, Google Docs or mail client, or install the app, and it underlines things where you already type. Hosting your own server is an option, not a requirement. |
| Platforms and integrations | B | Add-ons for Chrome, Edge, Firefox, Safari and Opera, plugins for Google Docs, Word, Apple Pages and LibreOffice, email add-ons, apps for Windows, macOS and iOS, and a proofreading API. The hole is Android: no app for it appears on the site, so no A. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who LanguageTool is for
- Fits if you write in several languages and not only English
- Works for people who write in LibreOffice, Thunderbird or Apple Pages and want a checker inside them
Who it is not for
- Pricey if you pay monthly, at $24.90 against $69.90 for the whole year
- Tight if you're staying free, as it checks 2,000 characters per text field and allows 3 AI rephrasings a day
- Watch out: there's no Premium trial, only a 14-day money-back guarantee, and Teams is sold from 2 users
- Skip it if you want an app on an Android phone, as none appears on the site
- Too light for plagiarism checks, AI-text checks or summarising, which some rivals include
Good to know
Good for
- People who write in several languages, not only English
- LibreOffice, Thunderbird and Apple Pages users who want a checker add-on
- Developers who need a proofreading API or a checker they can host themselves
Worth knowing
- The free Basic plan checks 2,000 characters per text field and allows 3 AI rephrasings a day.
- There is no free trial of Premium; LanguageTool offers a 14-day money-back guarantee instead.
- Monthly billing is $24.90, more than four times the per-month cost of the annual plan.
- Apps are listed for Windows, macOS and iOS; no Android app appears on the site.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$4.99
A month to start. There is a free plan too
LanguageTool has a free plan. Paid plans start at $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually.
Basic
$0
Grammar, punctuation and spelling checks on up to 2,000 characters per text field, with 3 AI sentence rephrasings a day.
Premium
$5.83
per month, billed annually ($69.90); $24.90 billed monthly
Up to 150,000 characters per text field, 20,000+ extra checks, unlimited AI paraphrasing and a personal style guide. Also $49.90 a quarter or $119.80 for 2 years.
Teams
$66.40
per user / year, for a team of 2 users
Every Premium feature plus user management, a team style guide and a team dictionary. Sold from 2 users, with a lower per-user price for larger teams.
The free plan
Basic plan: grammar, punctuation and spelling checks in 30+ languages on up to 2,000 characters per text field, with limited Picky Mode and 3 AI rephrasings a day.
Read from languagetool.org on Oct 5, 2026.
Ways to pay less
Annual discount
Longer billing terms cost less per month
Premium is $24.90 billed monthly, $49.90 a quarter, $69.90 a year or $119.80 for two years, which works out to about $5.83 and $4.99 a month on the two longest terms.
Stated on languagetool.orgEducation
Up to 20% off for students and educators
Students, teachers and professors can claim an educational discount of up to 20% off a Premium subscription.
Stated on languagetool.orgOther savings
Team seats priced below individual plans
On Teams, each seat costs less than the $69.90 individual annual price: $66.40 per user for 2 users and $62.91 per user from 10 users.
Stated on languagetool.orgOther savings
Limited-time 20% discount on Premium
The pricing page was advertising a limited-time 20% discount on Premium, with a countdown, when it was checked on 2026-10-05.
Stated on languagetool.org
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
5
Places it runs: Web, macOS, Windows, iOS and Browser extension
Grammar and style checker for more than 30 languages. Here is what it does, as its own site describes it, and what it covers: open source, self-hostable, public API, AI features, grammar & style.
What it hasn't got is the extras its rivals carry, like Grammarly's plagiarism and AI-text checks or QuillBot's summarising.
- Grammar, spelling and style checks
- Checks grammar, punctuation, spelling, casing and style. Premium adds more than 20,000 extra checks for English, German, French, Spanish, Dutch, Polish and Portuguese.
- AI paraphrasing
- Rephrases a sentence to be more formal, more fluid or shorter. Basic accounts get 3 rephrasings a day and Premium removes the limit.
- Long-text checking
- Premium checks up to 150,000 characters per text field, against 2,000 on the Basic plan.
- Style guide and dictionaries
- Custom rules enforce consistent wording. Teams share a style guide and a dictionary of approved terms, with admins deciding who can add to them.
- Add-ons and apps
- Browser add-ons for Chrome, Edge, Firefox, Safari and Opera, plugins for Google Docs, Word, Apple Pages and LibreOffice, email add-ons, and apps for Windows, macOS and iOS.
- Open-source core and API
- The core checker is open source, with code on GitHub, and users can set up their own LanguageTool server. A hosted Proofreading API accepts up to 60,000 characters per request.
Where it runs
- Web
- macOS
- Windows
- iOS
- Browser extension
What it works with
- Google Docs
- Microsoft Word
- Gmail
- LibreOffice
- Thunderbird
- Apple Mail
- Apple Pages
- Outlook
LanguageTool is made by LanguageTooler GmbH, and has been around since 2003.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
43/69
Other writing tools it is graded above
LanguageTool's GPA of 2.8 is higher than 43 of the 69 other writing tools we grade, and level with 13.
It stands best on features (B, above 36 of 69) and worst on free plan and trial (C, above 5).
Its paid plans start at $4.99 a month, against a middle price of $8 for the category: 8 of the 44 others that charge start lower.
On features, ease of use and platforms it scores 3.0 out of 4. 1 tool scores higher and costs less.
Each grade against the category
Every bar is all 70 writing tools we grade, cut by the letter each got. LanguageTool’s own letter is outlined.
- BValue for moneyAbove 35 of 69
- CFree plan and trialAbove 5 of 69
- BFeaturesAbove 36 of 69
- BEase of useAbove 32 of 69
- BPlatforms and integrationsAbove 32 of 69
Price against what you get
Each dot is one of 53 writing tools. Further left costs less; higher up scores better on features, ease of use and platforms. LanguageTool is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
Nothing LanguageTool does is plain enough to make in a weekend. The 6 things listed below take a company.
It costs $59.88 a year. LanguageTool is open source, so there is a third way: take its code and run it yourself.
What you could not
- Grammar checking as you type, wherever you type.
- Apps for macOS, Windows and iOS that stay in step with each other.
- It plugs into other products, Google Docs, Microsoft Word and Gmail among them, and has an API.
- AI features, unless you pay a model provider for each request yourself.
- Sharing with other people, which means accounts and invitations.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. LanguageTool’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Grammarly, QuillBot, ProWritingAid, DeepL Write and Antidote
The 5 tools LanguageTool is most often weighed against, with where each one differs from it.
- 3.0GPA
Grammarly
Free plan · from $12/mo
Writing assistant for grammar, tone and rewrites in any app.
- Only Grammarly lists an Android app.
- LanguageTool is open source and self-hostable, according to its own site.
- Grammarly also covers AI agents, citations and documents.
- 2.8GPA
QuillBot
Free plan · from $8.33/mo
AI paraphraser with grammar, summarizing and AI-detection tools.
- Only QuillBot lists an Android app.
- LanguageTool is open source and self-hostable, according to its own site.
- QuillBot also covers chat assistant and citations.
- 2.6GPA
ProWritingAid
Free plan · from $10/mo
Grammar, style and story-critique toolkit for book writers.
- Only LanguageTool lists an iOS app.
- LanguageTool is open source and self-hostable, according to its own site.
- ProWritingAid also covers long-form writing.
- 2.6GPA
DeepL Write
Free plan · from €6.99/mo
AI writing assistant for corrections, rephrasing and tone.
- Only DeepL Write lists an Android app.
- LanguageTool is open source and self-hostable, according to its own site.
- 2.4GPA
Antidote
Free trial · from $59.95/yr
Grammar corrector, dictionaries and language guides in one.
- LanguageTool has a free plan. Antidote does not, though it has a free trial.
- LanguageTool is open source and self-hostable, according to its own site.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
15
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is LanguageTool free?
LanguageTool has a free plan. Basic plan: grammar, punctuation and spelling checks in 30+ languages on up to 2,000 characters per text field, with limited Picky Mode and 3 AI rephrasings a day.
How much does LanguageTool cost?
LanguageTool lists 3 plans. Basic: $0.
What platforms does LanguageTool work on?
LanguageTool is available on Web, macOS, Windows and iOS. It also has a browser extension.
Does LanguageTool offer any discounts?
LanguageTool publicly lists the following: Longer billing terms cost less per month; Up to 20% off for students and educators; Team seats priced below individual plans; Limited-time 20% discount on Premium.
Does LanguageTool have an Android app?
No Android app was listed when its pages were read on Oct 5, 2026. LanguageTool is listed for Web, macOS, Windows and iOS.
Does LanguageTool have a Linux app?
No Linux app was listed when its pages were read on Oct 5, 2026. LanguageTool is listed for Web, macOS, Windows and iOS.
Is LanguageTool open source?
Yes. LanguageTool is open source, according to its own site.
Does LanguageTool have an API?
Yes. LanguageTool offers a public API, according to its own site.
What does LanguageTool integrate with?
LanguageTool's listing names Google Docs, Microsoft Word, Gmail, LibreOffice, Thunderbird, Apple Mail, Apple Pages and Outlook.
Does LanguageTool have a student discount?
Up to 20% off for students and educators. Students, teachers and professors can claim an educational discount of up to 20% off a Premium subscription.
Who makes LanguageTool?
LanguageTool is made by LanguageTooler GmbH. It dates from 2003.
What are the alternatives to LanguageTool?
The closest alternatives to LanguageTool in our directory are Grammarly, QuillBot, ProWritingAid, DeepL Write and Antidote.
How does LanguageTool compare with other writing tools?
LanguageTool's GPA of 2.8 is higher than 43 of the 69 other writing tools we grade, and level with 13.
Is LanguageTool good value for money?
ToolGPA grades LanguageTool B for value for money. Its paid plans start at $4.99 a month, against a middle price of $8 for the category: 8 of the 44 others that charge start lower.
Could I make my own version of LanguageTool?
Nothing LanguageTool does is plain enough to make in a weekend. The 6 things listed below take a company.
Where this guide comes from
The prices, plans, platforms and features were read from LanguageTool’s own pages on Oct 5, 2026, and the grades were given on Oct 10, 2026. Graded from this listing, whose facts were read from LanguageTool's own pages on 5 October 2026. Also tested with a demo account on 2026-06-23.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by LanguageTooler GmbH. Prices change, so check languagetool.org before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- LanguageTool, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/languagetool
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "LanguageTool: The Insider's Guide", checked Oct 5, 2026. https://toolgpa.com/tools/languagetool
Know someone choosing between writing tools?
Send them this guide: toolgpa.com/tools/languagetool/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded writing tools after LanguageTool, each with an Insider's Guide of its own.
- Writing Tools Insider's GuideEvery one of the 70 writing tools we grade, compared
- Microsoft Word Insider's GuideWord processor sold with Microsoft 365, free in the browser3.4 GPA
- Beat Insider's GuideFree, open-source Fountain screenwriting app for Mac and iOS3.2 GPA
- JotterPad Insider's GuideMarkdown and Fountain editor for books, papers and screenplays3.2 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what LanguageTool’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. LanguageTool is a trademark of its owner, and this guide is not made, paid for or approved by LanguageTooler GmbH. Prices and plans change: check languagetool.org before you buy.