Observed arrival · 2026-09-28
Prosechecker puts an AI detector’s error rates on the page
A no-signup tool that checks English text for AI-like patterns, with a five-check daily limit and a separately priced offline toolkit.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Writers checking English prose for AI-like patterns
- Worth noticing
- The site reports testing on 5,035 held-out human samples across 12 sources and 507 samples from nine unseen model families.
Field notes
The checker combines an offline N-gram language model with text statistics and explicitly declines to score several input types rather than guessing. Its page reports separate strict and balanced results, notes higher false positives on news-style text, and says three major model families have not been tested. The listed desktop toolkit runs offline; personal, commercial, and OEM licenses have different terms.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
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