LanguageTool
FreemiumAI grammar checker for 30+ languages with style and tone suggestions.
By Tanmay Verma, Founder · Last verified 06 Jul 2026
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Added 6d ago
77/100Safe BetIn short
LanguageTool — AI grammar checker for 30+ languages with style and tone suggestions. Best for Non-native English speakers improving writing across multiple languages, Students and academics checking essays and theses in several languages, Business teams needing consistent brand voice with shared style guides. Free to start; paid plans from $7.49179/mo.
Is LanguageTool actually worth it?
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Editorial Verdict
Best for
Non-native English speakers improving writing across multiple languagesStudents and academics checking essays and theses in several languagesBusiness teams needing consistent brand voice with shared style guidesPrivacy-conscious users who want a grammar checker that doesn't store textWriters using LibreOffice or other open-source office suites
Not ideal for
Users needing offline grammar checking (most features require internet)Creative writers seeking deep stylistic and narrative analysisEnglish-only users who prefer Grammarly's more polished tone suggestionsLarge enterprises needing SSO, advanced admin, and API without custom planUsers who need a one-time purchase without subscription
LanguageTool is the best choice for multilingual writers and privacy-conscious users. Its free tier is genuinely useful, and Premium offers strong value at a lower price than Grammarly. However, English-only users who want deep stylistic analysis may prefer Grammarly.
Compare with: LanguageTool vs DeepL Write Pro, LanguageTool vs Quillbot, LanguageTool vs Saner
Last verified: July 2026
What independent users actually report about LanguageTool
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
87 mentions across 7 sources (Reddit, Hacker News, YouTube, Product Hunt, App Store, GitHub, Lemmy).
47% positive53% critical
Recurring strengths
- +Supports grammar checking in 30+ languages, rare among competitors.
- +Open-source core allows self-hosting and community auditing.
- +Strong privacy: no text stored by browser add-on, GDPR-compliant.
- +Effective IDE and Vim integration via plugins like ALE.
- +Picky Mode catches subtle stylistic issues beyond basic grammar.
Recurring frustrations
- −Browser extension now requires a Premium subscription.
- −LibreOffice add-on has severe memory leak issues.
- −Support responsiveness has declined over time.
- −Setup can be bureaucratic, especially with Overleaf and Safari.
- −False positives and missing suggestions in some languages.
Patterns worth knowing
Paywalling of browser extension sparked backlash
Seen on Hacker News, Lemmy
Strong privacy and open-source ethos valued
Seen on Hacker News, App Store, Lemmy, GitHub
Multilingual support is a key differentiator
Seen on App Store, Lemmy, YouTube
Learning curve
beginnerProductive in ~5 minutes
Hidden costs people mention
- • Browser extension now requires Premium; free users lose that key feature.
- • Premium pricing jumped to $75/mo for some users, then lowered; volatility concerns.
- • Self-hosting requires technical know-how and server resources.
In users’ own words
“Hello. I’m a big fan and user of LanguageTool and am happy with the new macOS app/system support. Are there plans to make it available for the iWork suite (Pages, Numbers & Keynote)? I’d be really happy to break free of Word!”
“Hello. I have successfully installed/configured LanguageTool as a server and start using it with Firefox plugin. The symbols in the right down box are very useful also for checking if it's working... and in this case it's working fine. Unfortunately I can't say the same for the Collabora online and Libre Office 7.4 case. I have the last version installed/configured but I can't even know if it's working since…”
“​ https://preview.redd.it/o9ckoypnshi91.png?width=3456&format=png&auto=webp&s=ef7beac8dc367330fd7a89ed08a626a9003f7cd8”
Real posts from independent users, linked to the source — not testimonials we collected.
Viability Score
77/100
Safe BetHow likely is LanguageTool to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
momentum
55
funding runway
80
website health
90
wrapper dependency
100
Last calculated: July 2026
How we score →Key Features
- Grammar and spell check in 30+ languages
- Style and tone suggestions
- AI-powered paraphrasing tool
- Picky Mode for advanced punctuation and typography
- Personal dictionary
- Team dictionary and style guide
- Statistics tracking (words, errors, languages)
- Browser add-on for Chrome, Firefox, Edge, Safari, Opera
- Email add-on for Gmail, Outlook, Apple Mail, Thunderbird
- Office plugin for Google Docs, Word, Apple Pages, LibreOffice
- Desktop app for macOS and Windows
- Up to 150,000 characters per text (Premium)
- 20,000+ additional checks for select languages (Premium)
- Open-source core
- GDPR-compliant, no text stored by browser add-on
About LanguageTool
FreemiumBeginner-friendlyAPI availableWeb · Desktop · Plugin
LanguageTool is an AI-powered grammar, style, and spell checker that supports over 30 languages and dialects. It catches spelling errors, grammar mistakes, and punctuation issues in real time, and offers advanced style and tone suggestions. The free version covers basic checks, while Premium unlocks more than 20,000 additional checks, unlimited AI paraphrasing, a style guide, and up to 150,000 characters per text. Available as browser add-ons (Chrome, Firefox, Edge, Safari, Opera), email add-ons (Gmail, Outlook, Apple Mail, Thunderbird), office plugins (Google Docs, Word, Apple Pages, LibreOffice), and desktop apps (macOS, Windows). LanguageTool was originally open-source and is GDPR-compliant, with a focus on privacy — the browser add-on stores no text on its servers. It targets non-native speakers, students, and professionals who write in multiple languages, and stands out for its multilingual strength and lower price compared to Grammarly, though it may lack Grammarly's polish in English tone analysis.
Behind the Verdict
LanguageTool fills a real gap: a grammar checker that speaks your language, literally. With support for over 30 languages and six English variants, it's unrivaled for non-native speakers or anyone writing across languages. The free version handles basic spelling and grammar admirably, making it a solid entry point. Premium adds depth: advanced checks for punctuation and style, unlimited paraphrasing, and a style guide. At roughly half the price of Grammarly's Premium, it's a budget-friendly alternative. Privacy is another win — the browser add-on stores no text, and the service is GDPR-compliant. But there are trade-offs. LanguageTool's English style suggestions aren't as nuanced as Grammarly's, and it lacks the same level of tone detection. Creative writers may find its suggestions too mechanical. It also requires an internet connection for most features; there's no true offline mode. For teams, the Team plan offers shared style guides and dictionaries at $7.99/user per month, which is reasonable. However, business users needing SSO or advanced admin will need a custom plan. Overall, we'd recommend LanguageTool for multilingual writers, students, and anyone who values privacy. English-only power users should weigh Grammarly's more polished features against the price difference.
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Use Cases
- Check and correct grammar in emails before sending
- Improve style and tone of blog posts and articles
- Paraphrase sentences to make them more formal or fluid
- Maintain consistent brand voice across team documents
- Learn from mistakes with statistics and personalized dictionary
Limitations
- The free version has limited paraphrasing (likely up to 5,000 characters per text) and fewer checks.
- Premium increases limits to 150,000 characters and adds 20,000+ advanced checks.
- The browser add-on requires internet.
- No offline mode.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Annual total
Free
Over 12 months
Effective monthly
Free
Billed monthly
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Integrations
GmailOutlookApple MailThunderbirdGoogle DocsMicrosoft WordApple PagesLibreOfficeChromeFirefoxEdgeSafariOperaSlack (via macOS app)Notes (via macOS app)
Resources & Guides
Frequently Asked Questions
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Common stack mates teams adopt alongside LanguageTool, with the specific reason each pairing earns its keep.
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