AI Tool Comparison
Comparing as AI Grammar & Proofreading ToolsLanguageTool vs Grammarly
Compare features, pricing, pros & cons, and user ratings to decide which AI tool is best for your needs.
LanguageTool
VS
Grammarly
Verdict by Category
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Detailed Comparison
Feature
LanguageTool
Grammarly
Pricing
FreemiumLanguageTool offers a free plan with basic grammar and spelling checks limited to 2,000 characters per text field \u2014 suitable for short emails and social media posts.
Premium plans unlock 150,000 characters per field, advanced style suggestions, AI-powered paraphrasing, personal dictionaries, and synonym tools. Pricing: $24.90/month (monthly), $69.90/year ($5.83/mo), $49.90/quarter, or $119.80 for 2 years ($4.99/mo) \u2014 making the 2-year plan one of the most affordable premium grammar checkers available.
LanguageTool for Teams (Business) adds team management, centralized billing, API access, and custom dictionaries. Contact LanguageTool through languagetool.org for business pricing.
FreemiumGrammarly's Free plan is available at no cost and includes mistake-free writing, tone detection, and 100 AI text generation prompts per month — suitable for individuals with basic needs.
The Pro plan costs $12/member/month billed annually ($30/month when billed monthly) and adds full-sentence rewrites, tone adjustments, brand voice customization, style guide adherence, and 2,000 AI prompts per month.
Enterprise plans are available through Superhuman Go with unlimited members, proactive AI across all apps and tabs, confidential mode, data loss prevention, granular roles and permissions, and dedicated support. Organizations report saving an average of $5,000 per employee per year.
Categories
AI Writing Assistant ToolsAI Productivity Tools
AI Writing Assistant ToolsAI Productivity ToolsAI Copywriting Tools
Summary
Open-source AI grammar checker for 30+ languages \u2014 privacy-first, multilingual, and GDPR-compliant
AI writing assistant for real-time grammar, clarity, tone, and style — works everywhere you write
LanguageTool Pros & Cons
Pros
- 30+ languages and 45+ dialects — unmatched multilingual grammar checking coverage
- Privacy-first: text not stored on servers, GDPR-compliant EU-based processing
- Open-source core — transparent, community-contributed rules available on GitHub
- Highly affordable — Premium from $4.99/month on 2-year plan, best value in category
- Works across Google Docs, Word, LibreOffice, all browsers, Gmail, and social platforms
- Automatic language detection — seamlessly handles multilingual documents
- Trusted by publishing houses, academic institutions, and international business teams
Cons
- Free plan limited to 2,000 characters per text field — restrictive for long documents
- AI features (paraphrasing, advanced style) only available on Premium
- Style suggestions less sophisticated than Grammarly Premium for native English writers
- No built-in plagiarism checker or document editor
- Customer support response times reported as slow by some users
Grammarly Pros & Cons
Pros
- Works across every app and browser — not just a standalone editor
- Trusted by 40M+ users and 50K+ organizations worldwide
- Tone and clarity suggestions go well beyond basic spell-check
- Free plan is genuinely useful with no credit card required
- Enterprise features include DLP, SSO, and brand style guides
- Integrates natively with Google Docs, Outlook, and Slack
Cons
- Pro plan can be expensive at $30/month when billed monthly
- AI generation prompts are limited even on Pro (2,000/month)
- Suggestions can sometimes feel overly prescriptive for creative writing
- Desktop app required for full cross-app functionality
- No long-form AI document drafting like dedicated writing tools