Grammarly, ProWritingAid and LanguageTool compared on what their documentation says about data
Read the privacy policy and the product help pages together, because they answer different questions. The policy says what the company may do in general. The help page says what a given toggle does. When they disagree, I trust neither until I have asked support in writing.
Cite
DigiCruncher, "Grammarly, ProWritingAid and LanguageTool compared on what their documentation says about data", https://digicruncher.com/topic/grammarly-prowritingaid-and-languagetool-compared-on-what-their/, accessed 2026-11-09.I keep seeing the three big grammar checkers recommended to people who write for a living, and the recommendations never say a word about what happens to the text. I would like to do this the dull way: put Grammarly, ProWritingAid and LanguageTool side by side and compare only what each company's own documentation says about my writing. Is it used to train models? Is it stored? Can I switch things off?
I am not asking which one catches more errors. I know my own errors well enough. I am asking what a careful person should read before installing a browser extension that sees everything typed into a text box. If you have read these pages, tell me which lines mattered and where the pages are vague, and please say which tool and which plan you mean.
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Most helpful first- Marisol Q.Member ·
Read the privacy policy and the product help pages together, because they answer different questions. The policy says what the company may do in general. The help page says what a given toggle does. When they disagree, I trust neither until I have asked support in writing. Also check whether the extension reads every page or only the field you are in.
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