Turnitin Similarity

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What Turnitin Similarity is

Turnitin Similarity helps educators review student work for possible plagiarism or collusion by comparing it with other content. Reports include a similarity score, colour-coded matches, side-by-side source comparisons, and options to exclude matches. Comparisons cover student submissions, current and archived web pages, and premium publisher articles across 170 languages. A Flags Panel draws attention to potentially manipulated text, such as hidden or replaced characters. Similarity identifies matches for educators to assess; it does not decide whether plagiarism occurred. Through an LMS, students can make formative resubmissions and work on originality before final submission. The product is available on the web or through native LMS connections, API, and LTI 1.3, including integrations with D2L, Canvas, Moodle, and Sakai. It supports formats including DOC, DOCX, PDF, HTML, RTF, ODT, and TXT, and reports can be exported as PDF. AI writing and paraphrasing detection are available as a Turnitin Originality add-on; that feature is English-only. Pricing is on request.

Who it suits

It suits students, instructors, and administrators in institutions that want similarity reports and LMS-based review workflows. Educators must assess matches themselves; the product does not make a plagiarism determination.

What it does well

Compares submissions, web pages, and publisher articles across 170 languages
Reports show scores, colour-coded matches, and source comparisons
Supports LMS connections, API, and LTI 1.3
Offers formative resubmissions through an LMS
PDF report export is supported

What to know first

Pricing is available on request
AI writing and paraphrasing detection require the Originality add-on
The AI detection feature is English-only

Limits

Pricing is on request. AI writing and paraphrasing detection require the Turnitin Originality add-on, and the AI feature is English-only.

Plans

Plan	Billed and limits	Price
Turnitin Similarity	Contact sales for pricing · Institutional product · pricing not stated on the opened page	On request

As turnitin.co.uk lists them, read 3 Oct 2026. The maker's own page has the final word.

Getting started

Visit https://www.turnitin.co.uk/products/similarity/.
Contact Turnitin for pricing.
Use the web product or arrange a native or API/LTI 1.3 LMS integration.
Connect through an LMS such as D2L, Canvas, Moodle, or Sakai if applicable.
Use the Help Center for product guides and technical support contact options.

Verdict

Turnitin Similarity combines broad source comparisons with reports and LMS workflows for reviewing student work. Its matches are indicators for educators to assess, not plagiarism verdicts, and pricing requires an inquiry.

Questions

How much does Turnitin Similarity cost?

Pricing is on request; the product page does not state a price.

Which platforms does it support?

It is available on the web and can integrate with LMSs natively or through API and LTI 1.3. Listed LMSs include D2L, Canvas, Moodle, and Sakai.

What does a similarity report show?

It includes a similarity score, colour-coded matches, side-by-side source comparisons, and options to exclude matches.

Does a similarity match prove plagiarism?

No. Turnitin says Similarity flags text matches that may constitute plagiarism but does not determine whether plagiarism occurred.

Does it detect AI writing?

AI writing and AI paraphrasing detection are available through the Turnitin Originality add-on. The AI feature is English-only.

Can reports be exported?

Yes. Reports can be exported as PDF.

Facts from Turnitin Similarity's own pages

AI detection add-on: AI writing and AI paraphrasing detection are available through the Turnitin Originality add-on, with the AI feature noted as English-only. · turnitin.co.uk, 3 Oct 2026
Company: Turnitin says it has served the global education community since 1998 and lists an office in Oakland, California. · in.turnitin.com, 3 Oct 2026
Content coverage: The product compares work with student submissions, current and archived web pages, and premium publisher articles across 170 languages. · turnitin.co.uk, 3 Oct 2026
Flags panel: The Flags Panel highlights potentially manipulated text, including replaced or hidden characters. · turnitin.co.uk, 3 Oct 2026
Formative use: The product supports formative resubmissions through an LMS and is presented as a way to help students improve originality before final submission. · turnitin.co.uk, 3 Oct 2026
Integrations: Turnitin Similarity can be used on the web or integrated natively or through API and LTI 1.3 with LMSs including D2L, Canvas, Moodle, and Sakai. · turnitin.co.uk, 3 Oct 2026
Purpose: Turnitin Similarity compares student work with existing content to help educators review potential plagiarism and student collusion. · turnitin.co.uk, 3 Oct 2026
Security: The product page states that data is protected with SSL encryption, redundant servers, SOC 2-certified data centres, and GDPR compliance. · turnitin.co.uk, 3 Oct 2026
Similarity is not a plagiarism verdict: Turnitin says Similarity flags text matches that may constitute plagiarism but does not determine whether plagiarism occurred. · turnitin.co.uk, 3 Oct 2026
Similarity reports: Reports show a similarity score, colour-coded matches, side-by-side source comparisons, and options to exclude matches. · turnitin.co.uk, 3 Oct 2026
Support: Turnitin directs users to its Help Center for product guides, release notes, searchable help content, and technical support contact options. · turnitin.co.uk, 3 Oct 2026
Supported users: Turnitin identifies students, instructors, and administrators as users the product supports. · turnitin.co.uk, 3 Oct 2026

Where Turnitin Similarity stands on Freedom251

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