LanguageTool vs Grammarly
LanguageTool vs Grammarly: Key Differences
LanguageTool and Grammarly will both catch your typos and grammar slips, so the real decision is about what else you need. LanguageTool checks writing in more than 30 languages, offers a style guide and team dictionary, and has API access plus an open-source edition that reviewers single out. Grammarly's paid features are pitched at English writing, and it adds generative AI, tone rewrites, plagiarism checks and AI-text detection. If you write in more than one language or want to keep costs down, LanguageTool is the natural pick; if you write in English and want AI help beyond corrections, Grammarly does more.
Why multilingual writers keep recommending LanguageTool
Across 12 YouTube reviews, the praise centers on language coverage, including regional variants such as British and American English, and a picky mode that flags word choice and punctuation issues a basic checker skips. Reviewers call the pricing affordable and the free version decent. Several highlight that it is free and open source, works in LibreOffice and writing apps such as Obsidian and Ulysses, and offers a personal dictionary. One noted that the browser extension sends text over an encrypted connection and does not store it. The complaints are mostly about what it lacks: no generative AI, no plagiarism checking, limited paraphrasing and no Android app. Our feature data lists tone adjustment, but reviewers describe it as limited, so do not expect Grammarly-style tone rewrites.
Grammarly's extra layer of AI
The 12 YouTube reviews of Grammarly praise fast, reliable checks, clear explanations, and its presence across a browser extension, Word and Outlook, a desktop app and a mobile keyboard. Reviewers like the tone detector and full-sentence rewrites, and teams can upload style guides for consistent branding. The recurring complaints: the premium plan feels expensive, the free plan feels limited, and suggestions are sometimes wrong or robotic. A few reviewers raise privacy concerns, and one points out that leaning on its fixes is not the same as learning the rules.
Free plans, upgrades and teams
Both tools have a free plan. LanguageTool's Basic tier covers basic grammar, style and semantic checks; Premium adds advanced grammar checking, unlimited paraphrasing, a style guide and the browser add-on; Team adds user management plus a shared dictionary and style guide. Grammarly's free plan checks writing, shows your tone and includes a small number of AI prompts; Pro adds rewrites, tone adjustment, plagiarism and AI-text detection and a far bigger prompt allowance; Enterprise adds security controls such as data loss prevention. Reviewers generally describe LanguageTool's paid plan as the more affordable one. Only LanguageTool lists API access, which matters if you want to build checking into your own software.
Across 24 reviews, reviewers narrowly prefer LanguageTool, but treat that as a hint. Both checkers still do the core job well, so choose on languages, AI features and budget.
Reviewer Verdict
Slight leanAcross 24 reviews, reviewers narrowly prefer LanguageTool (8.7/10) over Grammarly (7.7/10).
Narrow lean — based on 24 reviews. The two tools are close, so treat this as a hint, not a recommendation.
What reviewers praise about LanguageTool
- Multilingual support (20+ languages)
- Free/open-source and affordable premium plans
- Clean, intuitive UI and easy installation
What reviewers praise about Grammarly
- Boosts productivity by saving editing time
- Advanced AI tools (plagiarism check, paraphraser, generative writing)
Both tools are praised for
- Wide integration (browsers, Google Docs, Word, LibreOffice, API)
- Robust grammar, style, and tone suggestions with personal dictionary
Based on 24 reviews from YouTube and Reddit.
Feature Comparison
| Feature | LanguageTool | Grammarly |
|---|---|---|
| Core | ||
| Long-form content generationWrite full articles, reports, or ebooks in one go | ||
| Short-form content generationCreate quick snippets like headlines, taglines, or captions | ||
| Blog post creationDraft complete blog posts with structure and flow | ||
| Social media contentGenerate posts for Twitter, LinkedIn, Instagram, etc. | ||
| Email/newsletter copyWrite marketing emails, drip sequences, or newsletters | ||
| Ad copy generationCreate text for Google Ads, Facebook Ads, and other campaigns | ||
| Product descriptionsGenerate copy for e-commerce listings and product pages | ||
| SEO content optimizationHelps your content rank higher in Google search results | ||
| Content rewriting/paraphrasingRephrase existing text to sound fresher or avoid repetition | ||
| Template libraryPre-built starting points for common content types | ||
| Grammar checkerCatches spelling, grammar, and punctuation mistakes as you write | ||
| AI | ||
| Brand voice customizationTrain the AI to write in your company's unique style and tone | ||
| Tone adjustmentSwitch between formal, casual, playful, or other writing styles | ||
| Multilingual supportWrite or translate content in multiple languages | 30+ languages | |
| AI chat assistantAsk questions and get help through a conversational interface | ||
| Fact-checking/citationsVerifies claims and adds source references to content | ||
| Plagiarism detectionScans output to make sure it's original and not copied | ||
| AI model selectionChoose which AI engine powers your content (e.g., GPT-4, Claude) | ||
| AI image generationGenerates images from text prompts to pair with your writing | ||
| AI detectorChecks whether text was likely written by an AI model | ||
| AI humanizerRewrites AI-generated text to sound more natural and human | ||
| Collaboration | ||
| Team workspacesShared spaces where your team can organize projects together | ||
| Multi-user editingMultiple people can work on the same document at once | ||
| Approval workflowsRoute content through reviewers before it gets published | ||
| Content calendarPlan and schedule when content goes live | ||
| Integration | ||
| API accessConnect the tool to your own apps or automations with code | ||
| WordPress integrationPublish directly to WordPress without copy-pasting | ||
| Chrome extensionUse the AI writing tool anywhere in your browser | ||
| CMS integrationsWorks with content management systems like Webflow or Shopify | ||
| Zapier/automation supportAutomate repetitive tasks by connecting to other tools | ||
| Custom integrationsBuild tailored connections to other tools your team uses | ||
| Support | ||
| Free plan availableYou can try the tool without paying anything | ||
| Priority supportGet faster help from the support team on paid plans | ||
| Custom onboardingPersonalized setup help to get your team started | ||
| Centralized billingManage payments and invoices for your whole team in one place | ||
| Dedicated account managerA named point of contact who helps with onboarding and ongoing questions | ||
Pricing Comparison
LanguageTool Pricing
Basic
| Contact |
Premium
| Contact |
Team
| Contact |
Grammarly Pricing
Enterprise
| Contact |
Free
| $0/mo |
Pro
| $12/mo |
Which Should You Choose?
Choose LanguageTool if...
You write in more than one language, or in a regional variety of English, and want one checker that handles them all. You value a capable free tier, an open-source option, API access for your own tools, and a team dictionary and style guide, and you do not need generative AI or plagiarism checks.
Choose Grammarly if...
You write mostly in English and want more than corrections: tone feedback, full-sentence rewrites, AI text generation, plagiarism checks and AI-text detection. You like having the same assistant in your browser, Word, Outlook and on your phone, and you accept a pricier upgrade for that breadth.