Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · AI Plagiarism Checkers

Turnitin Similarity vs iThenticate

  • 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
iThenticate #7 in AI Plagiarism Checkers 8.6/10 Paid ✓ 1 of 3 features Visit iThenticate

Turnitin Similarity leads on 0 checks, iThenticate 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
  • Most featuresTurnitin Similarity · 3 of 3

Turnitin Similarity scores higher on our rubric for ai plagiarism checkers: 9.2 against 8.6 out of 10; our editors rank them #3 and #7.

Turnitin Similarity is the better fit for institutions prioritizing established similarity workflows. iThenticate is the better fit for publishers and organizations checking submissions.

  • Turnitin Similarity fits best

    Institutions prioritizing established similarity workflows

  • iThenticate fits best

    Publishers and organizations checking submissions

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Turnitin Similarity 9.2/10 Visit ↗ iThenticate 8.6/10 Visit ↗
At a glance
Editor score 9.2 8.6
Ranking #3 in AI Plagiarism Checkers #7 in AI Plagiarism Checkers
Best for Institutions prioritizing established similarity workflows Publishers and organizations checking submissions
Pricing model Paid Paid
Starting price Pricing on request $125 one-time
Free plan Not checked yet —
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Integrations 4 integrations 3 integrations
Features Turnitin Similarity 3/3 · iThenticate 1/3
LMS integrations ✓ (best) Not checked yet
API access ✓ ✓
AI writing check ✓ (best) Not checked yet
Specs
Source coverage Web_academic_and_publisher Not checked yet
Maximum document words Not checked yet Not checked yet
Supported file formats DOC, DOCX, XLS, XLSX, PPT, PPTX, PostScript, PDF, HTML, HWP, RTF, ODT, WordPerfect, TXT Not checked yet
Report export Pdf Not checked yet
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
  • Checks web pages, publications, journals, Crossref, and submitted works
  • Provides comparison views, highlighted reports, and PDF downloads
  • Supports organizational API access, LTI, and SSO integrations
Cons
  • Institutional pricing requires contacting sales
  • AI-writing detection requires the Turnitin Originality add-on
  • Designed for institutional workflows rather than standalone individual use
  • No free plan is available
  • Individual access starts at a $125 one-time purchase
  • Organization pricing is customized rather than published
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 →

iThenticate is a web-based similarity-checking product from Turnitin for scholarly publishers, research departments, institutions, authors, and researchers. It compares manuscripts and other documents with internet pages, archived web…

Read the review →
  1. Turnitin SimilarityAI Plagiarism Checkers 9.2Pricing on request
  2. iThenticateAI Plagiarism Checkers 8.6Paid

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

  • iThenticate — where it wins

    • Checks web pages, publications, journals, Crossref, and submitted works
    • Provides comparison views, highlighted reports, and PDF downloads
    • Supports organizational API access, LTI, and SSO integrations

    Where it doesn't

    • No free plan is available
    • Individual access starts at a $125 one-time purchase
    • Organization pricing is customized rather than published

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