{"name":"LanguageTool","tagline":"Open-source multilingual grammar, style, and spelling checker.","url":"https://languagetool.org","category":"writing","pricing":"freemium","price_note":"Free browser/editor with basic checks; Premium unlocks advanced style, grammar, and higher limits","free_tier":true,"open_source":true,"api":true,"self_host":true,"verdict":"situational","verdict_text":"The strongest open-source option for multilingual grammar and style checking, with a solid free browser add-on. Premium unlocks deeper style rules and higher limits, but the core engine is self-hostable. Best for privacy-conscious users and teams that want EU-based tooling.","limitations":["Free tier has a 2,000-character limit per check and fewer style rules.","Premium paraphrasing is capped even on paid plans.","Self-hosted setup requires technical effort and your own infrastructure."],"strengths":["Strongest open-source option for multilingual grammar and style checking.","Solid free browser add-on for quick checks.","Core engine is self-hostable for privacy-conscious teams."],"use_for":["Multilingual writers who need an open-source grammar/style checker.","Privacy-conscious users and teams wanting EU-based tooling.","Teams with the ops capacity to self-host the core engine."],"skip_when":["You need unlimited style checks without the Premium cap.","The free 2,000-character limit per check breaks your workflow.","You cannot invest the technical effort to self-host."],"receipts":["https://languagetool.org","https://languagetool.org/premium"],"affiliate":"none","evidence_tier":"source-verified","momentum":"steady","featured":false,"data_sensitivity":{"trains_on_inputs":"unknown","local_processing":true},"last_verified":"2026-08-19","observed_by":"whysanesanders","slug":"languagetool","canonical_url":"https://noemium.com/tools/languagetool/","attribution":"Noemium catalog data is licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). See https://noemium.com/method/ for how entries are verified."}