LanguageTool
by LanguageTool · Grammar, punctuation and style checking in over 30 languages
BenchRank score
Screenshots of LanguageTool
Homepage
Overview
LanguageTool is an AI-based checker for spelling, grammar, punctuation, style and typography in over 30 languages and dialects. You paste or type text into the web editor, or install add-ons that check text in place in browsers, Gmail, Thunderbird, Word, Google Docs, LibreOffice and macOS or Windows apps. It also rephrases sentences to be more formal, fluent, simple or concise.
- Best for
- Writers and small teams checking grammar, punctuation and style across 30+ languages
- Pricing
- Free Basic tier; Premium is £19.90/month or £59.90/year (£4.99/month), and Teams starts at £113.80/year for two users (£56.90 per user), all prices including VAT.
- Runs on
- iOSmacOSWindowsBrowser extension
Strengths and trade-offs
Strengths
- Checks 30+ languages and dialects, including six English variants
- Add-ons for Chrome, Edge, Firefox, Safari, Word, Google Docs, Gmail
- Free tier covers spelling, grammar and basic punctuation checks
- Desktop apps for macOS and Windows; browser add-on stores no text
Trade-offs
- Free tier caps text at 2,000 characters against 150,000 on Premium
- Paraphrasing limited to 3 sentences per day without Premium
- Picky Mode, style guide and team features are Premium-only
- Team plan is billed annually only; no monthly option is shown
How LanguageTool markets itself
A structured read of the promise, proof and page design on LanguageTool’s captured homepage.
Homepage capture
“More than a Grammar Checker”
- Angle: All-in-one / consolidation
- Hero: Interactive demo
Pricing
Published plans and prices from LanguageTool’s own pricing page.
How this score is made up
Each dimension is scored out of 100 and combined into the headline score using fixed weights.
MCP support
Whether an agent can drive the product through the Model Context Protocol, and how much setup that takes.
API quality
Public API surface: machine-readable spec, official SDKs, documented auth, errors, rate limits and versioning.
Documentation
Publicly reachable docs — coverage, freshness, code samples and machine readability.
Agent friendliness
How readable the site is to an automated client: llms.txt, structured data, server-rendered content, crawler access.
Pricing transparency
Whether real prices are published, self-serve signup exists, and usage costs are knowable without a sales call.
Changelog
A public, dated record of what shipped and when — the clearest signal that a product is still alive.
Marketing site structure
Whether the site answers a buyer's questions: clear positioning, the pages that matter, and accessibility.
Page speed
How fast the site loads for real visitors: Chrome UX Report 75th-percentile LCP, INP and CLS, with a Lighthouse mobile run standing in where a site has too little traffic for field data.
Operational trust
Status page and incident history, security disclosure, compliance and data-processing documentation.
Measured, but not part of the score
Useful to know, but not a mark for or against the product — so these do not affect the ranking.
Openness
Source availability, self-hosting, data export and open standards. Scored and shown, but not part of the composite — paid SaaS is not worse for being paid SaaS.
Maintenance
Release cadence and repository activity. Scored and shown, but not part of the composite — it is only measurable for open repositories.
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Where this comes from
The LanguageTool pages BenchRank reads when it scores the product — its documentation, release notes, status and security pages, and its repository where there is one.
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