Turrii

The only AI detector that doesn't guess.

Most AI detectors look at finished text and guess. Turrii checks how your writing was made: it records your keystroke timing as you type, so it can prove a person wrote it.

How it works
1. Write where you already write
2. Once you've typed enough, a small Turrii button appears in the corner of the text box. Click it to verify your writing.
3. If it's verified as human-written, you get a proof ID. On Substack and most other sites, a verification mark with the ID is added to your draft automatically. On LinkedIn, copy it from the Turrii side panel.
4. Publish as usual. Anyone can click the ID and see the record confirming a human wrote it. No account needed to check.

What's included
- One-click verification from the text box you're writing in
- Sign just part of your text: highlight it and click Sign
- A side panel composer for drafting longer pieces
- A customizable verification mark and placement
- A public proof page for every post, plus a profile on turrii.com showing everything you've verified

Your privacy
Keystroke timing is stored in your browser and only sent when you choose to verify. It is used to check that the writing matches human typing, and that evidence is attached to your public proof record.

Free to start: 1,000 characters a month, no card needed.