LanguageTool
🇩🇪 DE · Free plan · paid from €56.90/user/yr
AI-powered multilingual grammar and style checker for 30+ languages
Features
Spelling, Grammar, and Punctuation
- Real-time error detection in over 30 languages
- Identifies incorrect word order, verb tenses, and subject-verb agreement
- Detects comma splices, superfluous commas, and apostrophe errors
- Checks typos, casing mistakes, and format issues (ISBN, IBAN)
Style and Semantic Optimization
- Detects informal wording, foreign expressions, and repetition
- Identifies overused phrases and wordiness
- Checks for inconsistent numbering and conflicting time/date formats
- Includes configurable 'Picky Mode' for deeper stylistic scrutiny
AI Paraphrasing and Generation
- AI-driven sentence rephrasing for formality, fluency, simplicity, or conciseness
Team and Enterprise Governance
- Centralized user management with owner, admin, and editor roles
- Shared Team Style Guides with custom brand rules
- Shared Team Dictionaries for industry-specific terminology
Editor and Productivity Tools
- Distraction-free standalone web/desktop editor
- Personal dictionary and custom personal style rules
- Text statistics for productivity tracking
Pricing
- Basic grammar, punctuation, and spelling checks
- 2,000–10,000 characters per text field
- 3 AI sentence paraphrases per day
- Up to 150,000 characters per text field
- Over 20,000 advanced checks
- Unlimited AI paraphrasing
- Up to 150,000 characters per text field
- Over 20,000 advanced checks
- Unlimited AI paraphrasing
- Up to 150,000 characters per text field
- Over 20,000 advanced checks
- Unlimited AI paraphrasing
- Up to 150,000 characters per text field
- Over 20,000 advanced checks
- Unlimited AI paraphrasing
- Centralized user management
- Shared Team Style Guides and Dictionaries
- Team-specific terminology and rules
- Custom pricing for large teams
- Enterprise-grade features and support
Prices include VAT where applicable. Paid plans have a 14-day money-back guarantee.
EU Trust Profile
What we verified against public sources, last checked 2026-09-10. Every point links to its evidence.
- Evidence →EU data residency
Core text-checking servers and databases are hosted in Germany and Ireland.
- Evidence →European legal entity
Registered at Amtsgericht Hamburg under HRB 198018.
- Evidence →Data Processing Agreement (DPA)
Publicly available and referenced for business customers.
- Evidence →Public sub-processor list
Listed in Appendix 3 of the DPA, including Telekom Germany, Hetzner, AWS EMEA, Google Cloud, Cloudflare, OpenAI, and Aleph Alpha.
- Evidence →Self-hosting available
Open-source version available under LGPL 2.1; premium on-premises version offered for larger businesses.
- Evidence →Open sourceLGPL 2.1
- Evidence →Documented data exportCSV
Personal/Team Dictionary exportable via Editor settings.
- Evidence →Local-language support
Localized Help Centers available for German, French, and Spanish.
We list only what we could verify against a public source on the check date. A point that is absent was not established either way — it is not a finding against the vendor. The vendor's own information prevails.
Work at LanguageTool?
This badge is free for every vendor we list and has no bearing on the order of any list. It is issued on the basis of a verified European headquarters (DE) and the compliance points we checked against public sources — the date on it is the date we last checked.
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Reviews
Recurring themes, synthesized from public reviews across portals.
What users value
- Intuitive, minimalist interface with near-frictionless setup and onboarding
- Supports 30+ languages, including German, Spanish, French, and Portuguese
- Open-source foundation with customizable dictionaries
- Detailed grammar rule explanations and formatting-preserving text handling
- On-premise/self-hosted option (Docker/local servers) for privacy-sensitive organizations
- Real-time performance without noticeable latency in browsers, email, and word processors
- Business and premium tiers considered more affordable than major competitors
Where users see room to improve
- · AI suggestions and paraphrasing are inconsistent, with occasional false positives or awkward rephrasings
- · Free tier has restrictive character/word limits and reduced extension capabilities
- · Customer support is slow, lacks live chat, and often relies on asynchronous ticket/email handling
Integrations
Feature, pricing and integration details are based on web research (as of 2026-09-10), without guarantee, errors are possible. The vendor's website prevails.