Last updated July 1, 2026. Beta.
Your email address, if you join the waitlist or sign in. The text you paste into the rewriter, which is sent to Anthropic's Claude API to produce your rewrite. A usage counter if you have an account, one browser cookie that tracks whether you have used the free rewrite, short-lived abuse-prevention counters keyed to a hashed network address (never the address itself), and anonymous page-view analytics.
Emails get used for exactly one thing: telling you when the beta opens, and later, things about your own account. Pasted text is processed to produce your rewrite and to run the quality checks we show you.
We do not pool your writing into a shared model. Your samples sharpen your own voice match and nothing else. We do not sell your data, and we do not send marketing on behalf of anyone else.
Email jake@northsignal.studio and a human will handle it.