Proofwriter — Email Authorship

Prove your emails were written by you, not AI — free, automatic, and it never stores what you write.

Proofwriter verifies that a specific email was written by a human, not AI—automatically, for free, with no account changes needed beyond a one-time connect. As you compose in Gmail, it watches for pasted text and tracks how long you spent writing. When you send, it adds a link to your signature that resolves to a public verification page showing word count, writing time, and whether anything was pasted—never the email's actual content. Free and unlimited for every account (even free). Learn more and sign up at proofwriter.app/extension