Does Hemingway Editor train AI on your data?
No
“We and our AI providers do not use this content to train, fine-tune, or improve AI models.”
From Hemingway Editor's privacy policy , checked Oct 28, 2026. In Grammar & Proofreading, 3 of 4 tools whose policies answer this say they don't train on customer content.
The rest of the data policy
Data retention
Eligible account records deleted within 30 days of deletion instruction; no automatic retention of editor writing
“We delete eligible account records and saved instructions within 30 calendar days after a valid deletion instruction”
Where data is stored
Not stated
Security and compliance
None stated
Other tools that say they don't train on your data
LanguageTool“Learneo does not use inputs from any LanguageTool user (Individual or Team Plan) to train its language algorithms or models. This is a default setting in LanguageTool that does not require an opt-out or any action by the user.”
ProWritingAid“When using ProWritingAid, your texts will not be used to improve the quality of our services.”
Hemingway Editor and your data: common questions
Does Hemingway Editor use my data to train AI?
No. Hemingway Editor's policy says: "We and our AI providers do not use this content to train, fine-tune, or improve AI models." (checked Oct 28, 2026).
How long does Hemingway Editor keep my data?
Eligible account records deleted within 30 days of deletion instruction; no automatic retention of editor writing. The policy says: "We delete eligible account records and saved instructions within 30 calendar days after a valid deletion instruction"
Which grammar & proofreading tools don't train on your data?
Among the closest alternatives, LanguageTool, ProWritingAid say in their policies that they don't use customer content for training.
Business plans often carry different terms than free and individual plans. We record what the public policy says; the quote shows which plan it covers. See Hemingway Editor's full profile or how other AI tools compare.