LanguageTool vs ProWritingAid
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 grammar checker and style editor with in-depth reports, aimed at long-form and fiction writers.
The short answer
Choose LanguageTool if you need…
- Writing in multiple languages
- Privacy-conscious grammar checking
Choose ProWritingAid if you need…
- Manuscript editing
- Detailed style reports
Side-by-side
| LanguageTool | ProWritingAid | |
|---|---|---|
| Type | Writing · Editing & grammar | Writing · Editing & grammar |
| Price | Freemium | Freemium |
| Platforms | Web, Chrome, macOS, Windows | Web, Windows, macOS, Chrome |
| Works with | Chrome, Microsoft 365, Google Workspace | Microsoft 365, Google Workspace, Chrome |
| 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.
ProWritingAid
A grammar checker and style editor with in-depth reports, aimed at long-form and fiction writers. More depth for long-form than Grammarly. The number of reports can be overwhelming.
Best for
LanguageTool
- Writing in multiple languages
- Privacy-conscious grammar checking
ProWritingAid
- Manuscript editing
- Detailed style reports
Strengths
LanguageTool
- 30+ languages
- Style suggestions
- Browser and Office add-ins
- Self-hostable core
ProWritingAid
- Grammar and style checks
- Over 20 writing reports
- Integrations with Word and Scrivener
- AI rephrase
Frequently asked questions
What is the difference between LanguageTool and ProWritingAid?
LanguageTool: A multilingual grammar, style and spell checker with an open-source core. ProWritingAid: A grammar checker and style editor with in-depth reports, aimed at long-form and fiction writers. LanguageTool suits writing in multiple languages, while ProWritingAid suits manuscript editing.
Are LanguageTool and ProWritingAid free?
LanguageTool: Freemium. ProWritingAid: Freemium.
What are other alternatives to LanguageTool and ProWritingAid?
Other options people compare them with include Grammarly, QuillBot, 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.