Grammar and paraphrasing
LanguageTool: review, pricing, data and alternatives
LanguageTool helps people writing texts correct spelling, grammar, and punctuation errors. It also lets users rephrase a sentence and apply a personal dictionary to their writing. A free tier exists. Access and transparency score: 75/100, #1 of 11 in its category.
| Access | 15/30 | |
|---|---|---|
| Openness | 30/30 | |
| Trust | 30/40 |
What is LanguageTool?
LanguageTool helps people writing texts correct spelling, grammar, and punctuation errors. It also lets users rephrase a sentence and apply a personal dictionary to their writing.
According to its documentation, LanguageTool lets you:
- correct spelling and grammar
- identify punctuation errors
- rephrase a sentence
- apply a personal dictionary
We file it under Grammar and paraphrasing, the category of tools to fix and rephrase text, and it also overlaps with aI browsers and extensions. The category lists 11 verified tools on this site.
The publisher is LanguageTooler GmbH, based in Germany. The service launched in 2003, which gives it some track record.
Who is it for?
It is mostly useful to these profiles: content writers, translators, and students. The need it covers is simple to state: fix and rephrase text.
LanguageTool is a good candidate if:
- you want to try before paying
- you plan to connect it to your tools or automations through its API
- you also work from your phone
- you want to read the code or host it yourself
The best test is a concrete case from your daily work: if the tool does not beat your current method within a week, move on to an alternative.
How much does LanguageTool cost?
Pricing model: freemium (limited free use, then paid). A free plan is offered, usually limited in volume or features.
The entry price is not shown publicly: you have to contact the publisher or create an account to see it.
To estimate what the same work would cost done directly with an AI model, use our API price calculator. Prices change often: always check the official site before subscribing.
Data and privacy
According to its privacy policy, data is processed in several regions depending on the plan.
Exporting your content: yes (details on the official site). Being able to get your data back makes switching tools easier later.
Three habits apply to every AI tool:
- turn off the use of your content for training if the option exists
- use a work account separate from your personal account
- review everything the tool produces before publishing or sending it
Platforms, languages and API
LanguageTool runs on: web browser, Windows, macOS, iPhone and iPad, browser extension, and API.
Interface languages: English.
A public API lets you call it from your own programs or an automation tool, and plug it into an AI agent.
The source code is public: languagetool-orglanguagetool-org/languagetool.
How we scored it
Our 75/100 score does not judge output quality: it measures what can be publicly verified about access to the tool, its openness and how far the publisher can be trusted.
| Criterion | Points | What counts |
|---|---|---|
| Access | 15/30 | free tier, published price, French interface |
| Openness | 30/30 | API, data export, open code |
| Trust | 30/40 | identified publisher, declared hosting, age, presence in reference lists |
The full calculation is explained on our method page.
Comparison with alternatives
LanguageTool against other tools in the grammar and paraphrasing category:
| Tool | Free | Entry price | API | Score |
|---|---|---|---|---|
| LanguageTool | Yes | not published | Yes | 75 |
| Grammarly | Yes | $12 per month | – | 73 |
| Wordtune | Yes | $6.99 per month | Yes | 71 |
| WriteHuman | Yes | $12 per month | Yes | 68 |
| Quillbot | Yes | €8.33 per month | No | 61 |
| editGPT | Yes | $96 per year | – | 61 |
| HumanizeAI.com | Yes | $14 per month | Yes | 58 |
| WordfixerBot | Yes | $48 per year | – | 58 |
Verdict
LanguageTool is among the most accessible and transparent tools in its category.
Strengths
- Free tier to try it
- Public API
- Public source code
- Established since 2003
- Available on many platforms
Limitations
- Price not published
Alternatives
- Grammarlyfree tier
- Wordtunefree tier
- WriteHumanfree tier
- Quillbotfree tier
- editGPTfree tier
- HumanizeAI.comfree tier
Categories and jobs
Learn more
Frequently asked questions
Is LanguageTool free?
Yes, a free plan exists, with usage limits.
Where is LanguageTool data stored?
According to the publisher, in several regions depending on the plan.
Does LanguageTool have an API?
Yes, a public API is documented.
What are the alternatives to LanguageTool?
In the same category: Grammarly, Wordtune, WriteHuman, and Quillbot.
LanguageTool or Grammarly: which one to choose?
Our score is 75/100 for LanguageTool and 73/100 for Grammarly. Try both on the same task before paying.
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Neutrality. No affiliate links. No vendor pays to be reviewed, rated or ranked. Reviews are directed by François Chollet, neutral and factual, and every data point is dated and sourced. How we score