AI detectors
AI detectors, explained for non-native English writers
What each tool checks, what it claims about its own accuracy, what independent research says — and what to do if your own writing is flagged. In a peer-reviewed Stanford study, seven detectors labeled 61% of human-written TOEFL essays as AI on average.
AI writing detectors
Turnitin
What a Turnitin AI score means, its known false-positive rates, and how to respond.
GPTZero
How GPTZero scores text, why it flags human writing, and what to do.
Copyleaks
Copyleaks reports very high accuracy, including on non-native English. Here's what it claims, what independent research says about detectors and ESL writing, and what to do if you're flagged.
ZeroGPT
ZeroGPT is a free AI detector claiming 98% accuracy. Here's what that claim is based on, why human and ESL writing still gets flagged, and what to do about a high ZeroGPT score.
Scribbr AI Detector
Scribbr offers a free AI detector and a premium version. Here's what each checks, why ESL writing can still be flagged, and how to use the score responsibly.
Originality.ai
Originality.ai is a paid AI and plagiarism checker popular with publishers. Here's how it's priced, what it claims about accuracy, and why ESL writers should treat its score carefully.
Winston AI
Winston AI claims 99.87% accuracy. Here's what that number is based on, how Winston is priced, and why non-native writers should treat any detector's score as an estimate.
Pangram
Pangram is an AI detector with a free daily allowance and support for 20+ languages. Here's how it's priced and how non-native writers should read its results.
Grammarly AI Detector
Grammarly offers a free AI detector and AI detection in Grammarly Pro. Here's what it says about its own accuracy, how it relates to Grammarly Authorship, and what ESL writers should know.
Tools people think detect AI — but don't
SafeAssign
SafeAssign is a plagiarism checker, not an AI detector. Here's what its originality report measures, how schools add AI detection to Blackboard, and what it means for ESL writers.
Turnitin Draft Coach
Draft Coach gives students similarity, citation and grammar checks in Word and Google Docs. Here's what it does, whether it checks for AI, and how non-native writers can use it.