AI detection that respects how high the stakes are
An accusation built on a single number isn't fair to anyone. Checkmark shows which passages look AI-written, how confident the model is, and — uniquely — how the text was actually typed, so the score never has to stand alone.
Passage-level, not paper-level
AI-flagged passages are underlined in the essay itself, each with its own evidence card — you see which parts, not just how much.
Calibrated confidence
Each finding shows a confidence gradient from human-like to AI-like instead of a false-precision decimal.
Backed by process evidence
The same report shows paste events and typing patterns, so an AI signal can be confirmed — or cleared — by how the text was written.
A slider, not a verdict
Every AI finding renders as a gradient slider between typical human writing patterns and typical AI patterns. The report keeps a permanent reminder next to the score:
“Typical AI writing pattern versus typical human writing styles. Do not solely rely on this score to determine AI authorship.”
— the disclaimer shown on every AI Detection card, verbatim
We put that in the product because it's true — of every AI detector, including ours. What makes the score usable is the evidence around it.
Guardrails we build in
Short texts say N/A
Below ~150 words there isn't enough signal for a trustworthy AI score, so the report says N/A instead of guessing.
Findings start conversations
Flag statuses (Flagged, Resolved, Not Flagged) are teacher-only. Nothing is shown to a student as an accusation.
Cross-checked by process
An 'AI-like' passage that was visibly drafted, revised, and typo-corrected over 40 minutes tells a different story than one pasted in at once. The report shows both signals.
Why detection alone was never enough
AI detectors — all of them — work on the finished text. Humanizer tools exist specifically to launder that text. But no tool can launder the writing session itself: a 900-word essay that appeared in one paste event, or was transcribed line-by-line at machine-steady speed, looks nothing like authentic drafting. That's why every Checkmark AI score ships inside a report that also reconstructs the writing process.
Judge it on your own essays
Paste real student writing (or ChatGPT output) into the demo and see the full report in about a minute.