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Head-to-head · AI Plagiarism Checkers

Turnitin Similarity vs PlagiarismDetector.net

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Turnitin Similarity #3 in AI Plagiarism Checkers 9.2/10 Pricing on request ✓ 3 of 3 features Visit Turnitin
PlagiarismDetector.net #11 in AI Plagiarism Checkers 8.1/10 Free plan Free plan✓ 3 of 3 features Visit site

Turnitin Similarity leads on 0 checks, PlagiarismDetector.net on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreTurnitin Similarity · 9.2/10
  • Free planonly PlagiarismDetector.net

Turnitin Similarity scores higher on our rubric for ai plagiarism checkers: 9.2 against 8.1 out of 10; our editors rank them #3 and #11.

On source coverage, Turnitin Similarity gives you Web_academic_and_publisher where PlagiarismDetector.net offers Web_only.

Turnitin Similarity is the better fit for institutions prioritizing established similarity workflows. PlagiarismDetector.net is the better fit for large web checks with LMS and API support.

  • Turnitin Similarity fits best

    Institutions prioritizing established similarity workflows

  • PlagiarismDetector.net fits best

    Large web checks with LMS and API support

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Side by side

Feature Turnitin Similarity 9.2/10 Visit ↗ PlagiarismDetector.net 8.1/10 Visit ↗
At a glance
Editor score 9.2 8.1
Ranking #3 in AI Plagiarism Checkers #11 in AI Plagiarism Checkers
Best for Institutions prioritizing established similarity workflows Large web checks with LMS and API support
Pricing model Paid Free plan + paid
Starting price Pricing on request $8/mo
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Docs Live chat
Integrations 4 integrations 6 integrations
Built for Mid-market, Enterprise Solo, Small business, Mid-market
Features Turnitin Similarity 3/3 · PlagiarismDetector.net 3/3
LMS integrations ✓ ✓
API access ✓ ✓
AI writing check ✓ ✓
Specs
Source coverage Web_academic_and_publisher Web_only
Maximum document words Not checked yet 25000 words
Supported file formats DOC, DOCX, XLS, XLSX, PPT, PPTX, PostScript, PDF, HTML, HWP, RTF, ODT, WordPerfect, TXT TXT, DOCX, PDF, HTML
Report export Pdf Pdf
Our review
Pros
  • Compares work against student, web, scholarly, and publisher content
  • Provides match groups, source comparisons, filtering, and integrity flags
  • Supports LMS workflows, PDF reports, and API submission and retrieval
  • Deep search across billions of web pages
  • LMS, Google Docs, and API integrations
  • Sentence-level results with downloadable PDF reports
Cons
  • Institutional pricing requires contacting sales
  • AI-writing detection requires the Turnitin Originality add-on
  • Designed for institutional workflows rather than standalone individual use
  • Coverage is focused on online web content
  • Basic plans list zero user seats
  • Plan sections use different word and page allowances
Our verdict

Turnitin Similarity is an institutional originality-checking product for schools, colleges, universities, instructors, administrators, and students. It compares submissions against student papers, current and archived web pages, scholarly…

Read the review →

PlagiarismDetector.net is a web-based plagiarism and AI-generated-text checker for students, teachers, writers, bloggers, publishers, and organizations. Users can paste text, submit URLs, exclude URLs from checks, or upload multiple files…

Read the review →
  1. Turnitin SimilarityAI Plagiarism Checkers 9.2Pricing on request
  2. PlagiarismDetector.netAI Plagiarism Checkers 8.1Free plan

Strengths and trade-offs

  • Turnitin Similarity — where it wins

    • Compares work against student, web, scholarly, and publisher content
    • Provides match groups, source comparisons, filtering, and integrity flags
    • Supports LMS workflows, PDF reports, and API submission and retrieval

    Where it doesn't

    • Institutional pricing requires contacting sales
    • AI-writing detection requires the Turnitin Originality add-on
    • Designed for institutional workflows rather than standalone individual use

  • PlagiarismDetector.net — where it wins

    • Deep search across billions of web pages
    • LMS, Google Docs, and API integrations
    • Sentence-level results with downloadable PDF reports

    Where it doesn't

    • Coverage is focused on online web content
    • Basic plans list zero user seats
    • Plan sections use different word and page allowances
  • Turnitin Similarity9.2/10 · Pricing on request

    A broad academic similarity workflow with LMS, reporting, filtering, and API support.

    Visit TurnitinFull verdict →
  • PlagiarismDetector.net8.1/10 · Free plan

    A web-focused checker with LMS, Google Docs, PDF reports, and API support.

    Visit siteFull verdict →

More comparisons

All AI plagiarism checkers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update