Your voice, unmistakably human.
Sigil isn't another flawed AI detector. It's a style authenticator that analyzes your manuscript for passages that *readers* might misperceive as AI-generated. Get actionable feedback to refine your work without sacrificing your unique voice, so you can publish with total confidence.
A waitlist signup is a vote. No spam — we'll only email you about Sigil.

The problem
Sound familiar?
You second-guess your natural writing style, worried a reader will falsely accuse you of using AI.
A single bad-faith accusation could damage your reputation, impact sales, or jeopardize a future publishing deal.
Existing AI detectors are unreliable and force you to change your authentic voice just to pass their tests.
What it would do
Built for how you actually work
The feature set we're validating — designed around real workflows, not theoretical use cases.
- Perception Analysis Report
- Stylistic 'Tell' Highlighting
- Voice Consistency Score
- Actionable Refinement Suggestions
The price point we're validating
Would you pay that? Your signup below is the answer we're looking for.
Want Sigil to exist?
Join the waitlist. Enough votes and we build it — you'll be first in line.