Writing · by Turnitin
Turnitin
The dominant academic plagiarism checker, with an AI-writing indicator built into its similarity reports.
+ Already deployed at most universities, so AI scores appear inside the workflow instructors use.
− No individual access, and its AI indicator has led to disputed accusations against students.
Open Turnitin ↗ best for: institution-wide academic integrity
Evidence
rank #115 of 257Head to head: Turnitin vs QuillBot Turnitin vs Copyleaks
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+ The paraphraser's mode slider (fluency, formal, simple, creative) is the fastest way to rework a clumsy paragraph.
− Paraphrased text sometimes changes meaning, and its humanizer and detector are unreliable against serious detection tools.
+ Supports 30+ languages and integrates with Canvas, Moodle and Blackboard.
− Credit-based pricing is confusing, and false positives on edited human text are common.
+ Highlights which sentences look AI-generated and offers a Google Docs writing replay as supporting evidence.
− Like all detectors it produces false positives, particularly on non-native English writers.
+ Combines AI detection, plagiarism, fact-check and readability scans with team seats and a full-site scan.
− Known for aggressive detection that flags human writing, with no free tier.