LanguageTool vs QuillBot
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Freemium
A multilingual grammar, style and spell checker with an open-source core.
AI tool · Freemium
A paraphrasing, grammar, summarising and citation tool popular with students.
The short answer
Choose LanguageTool if you need…
- Writing in multiple languages
- Privacy-conscious grammar checking
Choose QuillBot if you need…
- Rewording sentences
- Students summarising sources
Side-by-side
| LanguageTool | QuillBot | |
|---|---|---|
| Type | Writing · Editing & grammar | Writing · Editing & grammar |
| Price | Freemium | Freemium |
| Platforms | Web, Chrome, macOS, Windows | Web, Chrome, macOS, Windows |
| Works with | Chrome, Microsoft 365, Google Workspace | Chrome, Microsoft 365, Google Workspace |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
LanguageTool
A multilingual grammar, style and spell checker with an open-source core. Best for non-English writing. Advanced style suggestions require premium.
QuillBot
A paraphrasing, grammar, summarising and citation tool popular with students. Handy for rephrasing. Over-paraphrasing can raise academic-integrity concerns; follow your institution's rules.
Best for
LanguageTool
- Writing in multiple languages
- Privacy-conscious grammar checking
QuillBot
- Rewording sentences
- Students summarising sources
Strengths
LanguageTool
- 30+ languages
- Style suggestions
- Browser and Office add-ins
- Self-hostable core
QuillBot
- Paraphraser with modes
- Grammar checker
- Summariser
- Citation generator
Frequently asked questions
What is the difference between LanguageTool and QuillBot?
LanguageTool: A multilingual grammar, style and spell checker with an open-source core. QuillBot: A paraphrasing, grammar, summarising and citation tool popular with students. LanguageTool suits writing in multiple languages, while QuillBot suits rewording sentences.
Are LanguageTool and QuillBot free?
LanguageTool: Freemium. QuillBot: Freemium.
What are other alternatives to LanguageTool and QuillBot?
Other options people compare them with include Grammarly, ProWritingAid, Wordtune, Hemingway Editor, DeepL.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.