Certaffy

Feature · Live

Know what's written by AI — with evidence, not guesswork

Sentence-level scoring excludes references and headings. Results are probabilistic signals for conversation, not automatic verdicts.

How it works

1

Paste or upload

Submit an essay, report, or document from the web app.

2

Context-aware scoring

The engine scores meaningful prose in context — not isolated sentences.

3

Review highlights

See which passages drove the score and download a branded PDF.

FAQ

No detector is perfect. We publish limitations and use conservative bands to reduce false positives.

Try it on your own writing

Start free — 3 full highlighted reports, then 1 score-only scan/day up to 800 words. No credit card required.

Start free — no credit card required

Free account: 3 full highlighted reports, then 1 score-only scan/day up to 800 words. No account: 3 score summaries/day up to 2,000 words.