Turnitin
Turnitin is an AI tool that provides a comprehensive solution for academic institutions to promote academic integrity, streamline grading a...
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What is Turnitin?
Turnitin is an academic integrity and writing platform that helps educators and students develop original work through plagiarism detection, AI writing detection, and grading tools. The core product checks student submissions against a massive database containing billions of web pages (current and archived), a repository of previously submitted student papers, and collections from periodicals, journals, and publications including textbooks from publishers like W.W. Norton.
Key features include the Similarity Report (also called Originality Report) which highlights matching text and shows source details with color-coded indicators, AI Writing Detection that identifies text generated by AI tools like ChatGPT with 98% confidence and shows which sentences are AI-generated or AI-paraphrased, and integrated grading tools with feedback studio allowing instructors to provide comments, grades, QuickMarks, and ranged rubrics directly within the platform. Turnitin also integrates with learning management systems like Canvas, Brightspace, and Blackboard for seamless assignment workflows.
Turnitin is designed for educational institutions including K-12 schools, colleges, universities, and higher education institutions. It serves over 60,000 organizations worldwide with more than 2.1 million educators and 10,700 institutions using the platform. The primary users are instructors, professors, and academic administrators who need to grade assignments and verify academic integrity, as well as students who use it as a learning tool to improve their writing and citation practices before final submission.
Turnitin pricing
Pricing model: Free
Turnitin does not offer individual license purchases to students or freelancers - licenses are sold only to educational institutions. Students never pay Turnitin directly as costs are fully covered by institutions. Historical average annual fee per student is around $3-$7, varying by institution size, contract terms, number of users, features included, and geographic region. Large universities may pay tens of thousands annually for enterprise licenses. Base service has been quoted at approximately $1.79 per student, with AI detection included at about $6.50 per student. Minimum purchase for large institution enterprise license for Feedback Studio with Originality is around $6,700. Turnitin has not disclosed specific 2025 pricing figures. No free tier, freemium version, or free trial is available. Third-party services offer unofficial Turnitin reports at $9.99-$30 per month for individuals but these are not official Turnitin accounts.
Turnitin pros
- Detects AI-generated content from ChatGPT, GPT-3, GPT-4, and Claude with 98% confidence
- Compares submissions against billions of web pages including current and archived internet content
- Massive database includes previously submitted student papers from Turnitin's repository
- Includes thousands of periodicals, journals, and academic publications in search database
- Similarity Report highlights matching text with color-coded indicators from blue to red
- AI Writing Indicator shows percentage of document estimated as AI-generated below similarity score
- AI writing report highlights specific text segments predicted to be written by AI
- Two AI detection flags: cyan for AI-generated and purple for AI-paraphrased content
- Integrated grading tools allow instructors to provide comments and grades within platform
- Supports QuickMarks, ranged rubrics, and decimal scoring for improved grading efficiency
- Seamless integration with Canvas, Brightspace, Blackboard and other learning management systems
- Students can view similarity reports to identify areas needing rephrasing or citation
- Serves as learning tool to help students understand academic integrity and proper citation
- Helps catch accidental plagiarism like forgotten citations or insufficient paraphrasing before submission
- Promotes proper citation and referencing by encouraging review of citations and bibliography
- Timeline Tracker feature in 2025 shows keystrokes, pasted text, and revision patterns
- Can exclude quotes and bibliography from similarity score for more accurate results
- Supports multiple file formats including PDF, DOC, DOCX, PPT, XLS, RTF, HTML, and TXT
Turnitin cons
- Does not automatically detect plagiarism - similarity does not equal plagiarism
- Instructors must interpret similarity reports - tool doesn't make plagiarism determinations
- May miss contract cheating and plagiarism from sources not in database
- Cannot detect plagiarized ideas or concepts, only text matches
- Does not flag paraphrasing that dramatically changes wording while maintaining organization
- May not distinguish between properly and improperly cited work
- AI detection only works on long-form paragraphed writing, not short-form content
- Cannot reliably identify AI in bulleted lists, tables, annotated bibliographies, poetry, scripts, or code
- AI detection percentage only visible to instructors, not to students
- AI detection feature only available for English language submissions
- Only submissions made after April 4, 2023 checked for AI detection (past submissions need resubmission)
- AI detectors can be fooled and may incorrectly identify human writing as AI or vice versa
- Students cannot purchase Turnitin directly - only institutions can buy licenses
- No free tier or freemium version available for individual users
- No free trial offered
- May generate high similarity scores for correctly quoted and cited material
- Does not scan every site on the internet
- AI detection should not be used as definitive measure of misconduct or punitive tool
Frequently asked questions about Turnitin
What is Turnitin and how does it work?
Turnitin is an originality-checking and plagiarism prevention service that checks writing for citation mistakes or inappropriate copying. When you submit a paper, Turnitin compares it to text in its massive database containing student work, websites, books, and articles. It generates a Similarity Report showing the percentage of text matching other sources (0% to 100%), with matching sections highlighted and color-coded. The report provides source details for each match.
Does Turnitin detect plagiarism?
Turnitin does not check for plagiarism or automatically detect plagiarism in writing. It checks all submissions against its database and highlights similar text matches for review. The similarity score is simply the percentage of text matching other sources. Instructors must use the Similarity Report as a tool within their review process to make their own determination if academic misconduct is present - similarity does not equal plagiarism.
What is the Similarity Report?
The Similarity Report (also called Originality Report) compares submission text to targets including billions of web pages (current and archived), a repository of previously submitted student works, and collections from periodicals, journals, and publications. The overall Similarity Score is the percentage of content matching Turnitin's databases. Any matching text is detailed with source information. Report icons are color-coded: Blue (0% matching), Green (1-24%), Yellow (25-49%), Orange (50-74%), Red (75-100%).
What is Turnitin's AI Writing Detection feature?
Turnitin's AI Writing Detection identifies text generated by AI writing tools including ChatGPT, GPT-3, GPT-4, and Claude with 98% confidence. It provides an evaluative measure of how many sentences may be AI-generated. The AI indicator appears below the similarity score showing the overall percentage estimated as AI-generated. Clicking it opens the AI writing report which highlights specific text segments predicted as AI-written. Two flags exist: cyan for AI-generated content and purple for AI-paraphrased content.
Can students see their AI detection score?
No, the AI writing detection percentage is only visible to instructors or administrators. Students cannot see their own AI score. The AI indicator appears in the Similarity Report but remains hidden from students. This allows instructors to determine if further review, inquiry, or discussion with the student is needed regarding potential AI misuse.
What languages does Turnitin support for AI detection?
Turnitin's AI writing detection feature is currently only available for submissions in English. The feature does not support other languages for AI detection at this time. However, Turnitin's viewer and interface is available in English, Dutch, German, Norwegian, Danish, Swedish, French, and Spanish with further languages to follow.
Can students buy Turnitin directly?
No, Turnitin does not offer individual license purchases to users. This policy is non-negotiable - Turnitin only sells licenses to educational institutions, not individual students or freelancers. Students never pay Turnitin directly as the cost is fully covered by their institution. Students access Turnitin through their school's learning management system integration.
What file formats does Turnitin accept?
Turnitin supports many file formats including PDF, DOC, DOCX, PPT, PPS, XLS, XLSX, PPTX, PPSX, PS, RTF, HTM, HTML, WPD, ODT, TXT, HWP, and HWPX. The maximum file upload size is 100MB with a limit of 800 pages or 2MB of raw text. Supported MIME types include application/pdf, application/msword, application/vnd.ms-powerpoint, application/vnd.ms-excel, various OpenXML formats, text/rtf, application/rtf, and application/wordperfect.
How accurate is Turnitin's AI detection?
Turnitin's AI detector provides 98 percent confidence in identifying AI-generated text from tools like ChatGPT. However, Turnitin states the detection is not foolproof and the percentage should not be used as a definitive measure of misconduct or punitive tool. AI detectors can be fooled and may incorrectly identify human writing as AI or AI writing as human. Some institutions have disabled AI detection due to reliability concerns.
Can Turnitin detect all types of AI content?
Turnitin can only detect AI writing in long-form paragraphed writing. It cannot reliably identify AI influence in short-form content such as bulleted lists, tables, annotated bibliographies, or non-prose writing including poetry, scripts, and code. Turnitin examines each sentence in context by chunking work into approximately 100-word segments with overlaps, then internally labels each sentence as AI or not-AI to create the AI-generated percentage.