LanguageTool
AI Writing Assistants · by LanguageTool
Grammar checker and AI writing assistant for many languages.
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Summary
Grammar checker and AI writing assistant for many languages.
Good fit for
Not assessed yet
Poor fit for
None recorded
Pricing
$ as listed by the vendor · each price dated
| Plan | Billed monthly | Billed annually | Free trial |
|---|---|---|---|
| Basic | Free | – | |
| Premium | Not offered or not recorded | Not offered or not recorded | – |
| Premium Annual | Not offered or not recorded | $34.95/yr | – |
Basic
Free
Premium
- Billed monthly
- Not offered or not recorded
- Billed annually
- Not offered or not recorded
Premium Annual
- Billed monthly
- Not offered or not recorded
- Billed annually
- $34.95/yr
Also listed in other currencies: Premium EUR 59.90. We never convert currencies, and budgets are compared in USD only.
Features
Overall availability, and what each plan includes where we know it.
Capabilities
| Feature | Overall |
|---|---|
| Access permissions | Included |
| API access | Included |
| Brand voice | Included |
| Browser extension | Included |
| Grammar checking | Included |
- Access permissionsIncluded
- API accessIncluded
- Brand voiceIncluded
- Browser extensionIncluded
- Grammar checkingIncluded
Security and compliance
| Feature | Overall |
|---|---|
| GDPR compliance | Included |
- GDPR complianceIncluded
“Unknown” and “Not recorded” mean we have no data yet, not that the feature is missing.
Reviews of LanguageTool
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What users say about LanguageTool
Themes from 64 public Hacker News comments that mention LanguageTool (Nov 6, 2024 to Oct 9). These are people’s opinions, not facts we have verified. Counts are comments, not a survey.
What people like
Catches errors Grammarly and others miss
9 commentsMultiple commenters report that LanguageTool catches typos, grammar and missing articles that other tools miss, and that it is more rules-based and less AI-driven than Grammarly.
“LanguageTool does what I would expect. Harper does not.”
Hacker News · Jul 14, 2025(opens in a new tab) “It's now good enough to show smelling pisstakes inside my IDE, including things like missing articles.”
Hacker News · Jun 2(opens in a new tab) Free, local, and no-AI approach
7 commentsCommenters appreciate that LanguageTool can run locally without an AI or LLM layer, with a downloadable executable and open-source core, unlike cloud-based competitors.
“There is a local-only, no-signup-required executable available at https://languagetool.org/download/.”
Hacker News · Jul 16, 2025(opens in a new tab) “It's also devoid of AI/LLM bullshit for writing.”
Hacker News · Sep 24(opens in a new tab) Works across editors and apps
7 commentsUsers say LanguageTool integrates well with many tools, including Emacs, Obsidian, JetBrains IDEs, mutt and browser extensions.
“LanguageTool works perfectly with Emacs.”
Hacker News · Jul 16, 2025(opens in a new tab) “I am also able to integrate (a locally hosted) LanguageTool to check the grammar in the editor.”
Hacker News · Dec 9, 2024(opens in a new tab) Reliable self-hosted grammar checking
5 commentsSeveral commenters who self-host the open-source LanguageTool server say it is reliable and works well in their setup, including for teams running it on private infrastructure.
“It's incredibly reliable.”
Hacker News · Sep 24(opens in a new tab) “I've run LanguageTool Server with the ngrams[0] for years, it is legitimately excellent with the ngrams (and mediocre without).”
Hacker News · Jul 14, 2025(opens in a new tab)
Common complaints
Java dependency makes local install heavy
4 commentsSome commenters dislike that LanguageTool is built on Java, making the local install heavy and resource-hungry on personal computers.
“I only wish Languagetool didn't use Java, which is fine on a servers but horrible on personal-computers.”
Hacker News · Jul 14, 2025(opens in a new tab) Slower and limited without ngram data
4 commentsCommenters note LanguageTool is slower than alternatives and only performs well with the large ngram dataset, which is roughly 15 GB for English.
“it is legitimately excellent with the ngrams (and mediocre without).”
Hacker News · Jul 14, 2025(opens in a new tab) “Harper - 10 ms LanguageTool - 650 ms Grammarly - 4000 ms”
Hacker News · Jul 1, 2025(opens in a new tab) Paid subscription gates useful plugins
3 commentsSeveral commenters say LanguageTool restricts its mail and other plugins behind a paid subscription and does not offer a cheaper option for self-hosted users.
“However, LanguageTool nerfs their other plugins (like mail plugins) to require a subscription service.”
Hacker News · Sep 24(opens in a new tab) “They don't advertise this because they are trying to push their paid online services.”
Hacker News · Jul 16, 2025(opens in a new tab) Concerns about ownership and AI features
2 commentsSome commenters note the vendor was acquired by an American company and that the product has added AI features, which they see as a drawback.
“they have lately shoved in a few (thankfully optional) crappy LLM-based features (that don't even work well in the first place)”
Hacker News · Mar 9(opens in a new tab)
Grouped by AI on Oct 30, 2026. Every quote is copied word for word from the linked comment, and a theme needs at least two separate comments.
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