iThenticate vs Turnitin: Which Should PhD Scholars Use in 2026?
Meet the Expert
Vignesh Kumar
PhD Research Consultant & Academic Writing Specialist
- 10+ years guiding PhD scholars on plagiarism detection and academic integrity
- Specialist in Turnitin compliance, iThenticate, and similarity score reduction
- Helped 400+ researchers submit clean, journal-ready manuscripts
Short answer: Use Turnitin for your PhD thesis submission to your university — it is what examiners and universities use. Use iThenticate before submitting a manuscript to a journal — it is what publishers and editors use. Both are owned by Clarivate, but they serve different audiences, check different databases, and produce scores that cannot be directly compared.
Indian PhD scholars often face this question at two critical moments: before thesis submission to their university, and before submitting a paper to a Scopus or Web of Science journal. Choosing the wrong tool — or misreading the score from the right one — can delay your submission or mislead your revision strategy.
This guide gives you an exact comparison so you can make the right call at each stage.
Struggling with a high similarity score? Our experts reduce it legitimately before submission. Chat with our PhD Consultants
iThenticate vs Turnitin: Side-by-Side Comparison
| Feature | Turnitin | iThenticate |
|---|---|---|
| Primary users | Students, universities | Researchers, publishers, journals |
| Best use case | Thesis, dissertation, assignments | Journal manuscripts, conference papers |
| Database focus | Student papers, internet, publications | Published literature, preprints, crossref |
| Student paper database | Yes (largest in world) | No |
| Published journal coverage | Good | Excellent (CrossRef, Elsevier, Springer, etc.) |
| Access model | Via university subscription | Via institutional or direct subscription |
| Score comparability | Not directly comparable to iThenticate | Not directly comparable to Turnitin |
| Similarity report detail | Colour-coded, exclusion filters | Colour-coded, exclusion filters |
| Used by Indian universities | Widely (INFLIBNET Shodhganga) | Select research institutions |
| Used by publishers | Rarely | Elsevier, Springer, Taylor & Francis, etc. |
When to Use Turnitin
Use Turnitin when:
- Your university requires a Turnitin report as part of thesis submission
- Your supervisor asks for a similarity check before the viva
- You want to check your thesis against the world's largest student paper database — which is where most Indian university examiners will check your work
- You are submitting assignments or course work alongside your PhD
Most Indian universities that mandate plagiarism checks use Turnitin via the UGC-INFLIBNET Shodhganga Plagiarism Detection Tool (URKUND/Ouriginal is also used by some). If your university mandates Turnitin, running iThenticate on your thesis will not tell you how your university's examiner will see it.
Need to reduce your Turnitin score before thesis submission? Talk to our experts
When to Use iThenticate
Use iThenticate when:
- You are preparing a manuscript for journal submission — especially Scopus, Web of Science, Elsevier, Springer, or Taylor & Francis journals
- Your target journal explicitly asks for an iThenticate similarity report
- You want to check whether your paper overlaps with published literature at the level a journal editor will see
- You are checking a literature review chapter against recent publications before revising
iThenticate's Similarity Check service (via CrossRef) is used by thousands of journals as part of their peer review workflow. Elsevier, Springer Nature, Wiley, and Taylor & Francis all run submitted manuscripts through CrossCheck (powered by iThenticate). A score that appears low on Turnitin may appear higher on iThenticate because the latter checks against a deeper library of published research.
Database Coverage: The Key Difference That Changes Your Score
The most important practical difference between Turnitin and iThenticate is what they check your work against.
Turnitin's database includes:
- Over 1.6 billion student papers submitted globally — the single largest repository of student work anywhere
- Internet content and web pages
- Published journals and books (though secondary to student paper coverage)
- Previously submitted theses and dissertations
iThenticate's database includes:
- Published journal articles from major publishers (Elsevier, Springer, Wiley, etc.)
- CrossRef metadata and full-text content
- Preprints (arXiv, bioRxiv, SSRN)
- Conference proceedings
- Does NOT include the student paper repository
This means: a PhD scholar who has published papers before submitting their thesis may find iThenticate flags those papers, while Turnitin (which does not check the same published literature base as deeply) may not flag them as heavily. Conversely, if you borrowed phrases from other student theses, Turnitin will catch it; iThenticate likely won't.
Similarity Score Differences: Why They Don't Match
Scholars often run both tools and find different scores — sometimes significantly different. This is expected and not an error. The scores are not comparable because:
- Different databases — as described above, they check against fundamentally different content sets
- Different algorithms — how matching is weighted, how close paraphrasing is detected, and how exclusions work differ between platforms
- Different exclusion logic — Turnitin's filters (small match exclusion, bibliography exclusion) may behave differently from iThenticate's exclusions
Always interpret the score using the threshold set by the intended recipient — your university for Turnitin, your target journal's editorial policy for iThenticate. A 15% score on iThenticate is not better or worse than 15% on Turnitin — they measure different things.
How to Access iThenticate as a PhD Student in India
iThenticate is not freely available to students. Access options:
- Institutional subscription — ask your library if your institution has an iThenticate account. IITs, IIMs, and some central universities do
- Supervisor's access — faculty members at many research institutions have personal or lab-level iThenticate access
- Via Thesis Ace Writers — we can run an iThenticate check on your manuscript as part of our pre-submission review service
- CrossCheck via journal submission — when you submit a paper, the journal runs iThenticate; you may receive the report back with the editorial decision
Which Tool Should You Use for Your PhD Thesis?
For your PhD thesis: Turnitin. Check the tool your university mandates — for most Indian universities this is Turnitin or URKUND. For journal papers extracted from your thesis: iThenticate. Run it before submission so you know what the editor will see. If you want maximum confidence, run both — but interpret the scores separately, not interchangeably.
Related Reading from Thesis Ace Writers
"The tool you use matters less than the threshold you are checked against. Always check with your university or target journal for their specific similarity score policy — and use the tool they use."
— Vignesh Kumar, PhD Research Consultant, Thesis Ace Writers
Need an iThenticate or Turnitin check done professionally before submission? Get Expert Help
Frequently Asked Questions
Click a question to expand the answer.
Turnitin is designed for student submissions and is widely used by universities to check theses and assignments. iThenticate is designed for researchers and publishers, checking manuscripts before journal submission against a larger database of published literature.
iThenticate has access to a more extensive database of published research literature, making it more suitable for checking research papers and journal manuscripts. Both are owned by the same parent company (Clarivate).
iThenticate is typically available through institutional subscriptions. Many Indian universities and some research institutions provide access. Check with your library or research office.
iThenticate is preferred before journal submission as it's the tool most publishers use. It checks your manuscript against published literature more comprehensively than Turnitin.
No. The scores may differ because they use different databases and algorithms. A paper may score differently on each platform. Always use the tool required by your target institution or journal.