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Head-to-head · Plagiarism Checkers

Turnitin AI Writing Detection vs MOSS

Updated Oct 2026
Both researched from official sources
5 checks side by side

Higher score Turnitin AI Writing Detection #1 in Plagiarism Checkers 9.4/10 Pricing on request ✓ 4 of 4 features Visit Turnitin

MOSS #5 in Plagiarism Checkers 8.8/10 Free plan Free plan✓ 0 of 4 features Visit MOSS

Turnitin AI Writing Detection leads on 2 checks, MOSS on 1, and 2 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

Highest scoreTurnitin AI Writing Detection · 9.4/10
Free planonly MOSS
Most featuresTurnitin AI Writing Detection · 4 of 4

Turnitin AI Writing Detection scores higher on our rubric for plagiarism checkers: 9.4 against 8.8 out of 10; our editors rank them #1 and #5.

MOSS offers free plan; Turnitin AI Writing Detection doesn't. Turnitin AI Writing Detection offers web source matching; MOSS doesn't. Turnitin AI Writing Detection offers academic source matching; MOSS doesn't.

Turnitin AI Writing Detection is the better fit for institutions focused on AI-writing detection. MOSS is the better fit for free source-code checks across many languages.

Turnitin AI Writing Detection fits best
Institutions focused on AI-writing detection
MOSS fits best
Free source-code checks across many languages

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Side by side

Show only differences

Feature	Turnitin AI Writing Detection 9.4/10 Visit ↗	MOSS 8.8/10 Visit ↗
At a glance
Editor score	9.4	8.8
Ranking	#1 in Plagiarism Checkers	#5 in Plagiarism Checkers
Best for	Institutions focused on AI-writing detection	Free source-code checks across many languages
Pricing model	Paid	Free
Starting price	—	Free
Free plan	—	✓ (best)
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web, Linux
Support	Docs	Email
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Turnitin AI Writing Detection 4/4 · MOSS 0/4
Web source matching	✓ (best)	—
Academic source matching	✓ (best)	—
API access	✓ (best)	Not checked yet
LMS integration	✓ (best)	Not checked yet
Specs
Supported languages	Not checked yet	24 languages
Word limit	Not checked yet	Not checked yet
Report export formats	PDF	HTML
Our review
Pros	Highlights predicted AI-generated segments with an overall percentage Detects AI-paraphrased or bypassed English text Integrates with major LMS platforms and exports PDF or CSV reports	Free for non-commercial use with account registration Analyzes source code across 24 listed programming languages Highlights matching passages and excludes expected shared code
Cons	No free plan for individual or self-serve evaluation Pricing is quote-based and depends on institution size and requirements Focused on AI-writing detection rather than conventional similarity checking	Designed for non-commercial use Requires Linux submission script for file submission Results indicate similarity and require human review
Our verdict	Turnitin AI Writing Detection is an institutional feature and add-on for identifying text that may have been generated or modified by generative AI tools. It is designed for educators and academic-integrity teams handling assignments… Read the review →	MOSS, or Measure Of Software Similarity, is an Internet service for comparing source-code submissions and detecting potential plagiarism in programming classes. It is suited to instructors and educational settings that need to review… Read the review →

Turnitin AI Writing DetectionPlagiarism Checkers 9.4Pricing on request
M MOSSPlagiarism Checkers 8.8Free plan

Compare the top tools in

Strengths and trade-offs

Turnitin AI Writing Detection — where it wins
- Highlights predicted AI-generated segments with an overall percentage
- Detects AI-paraphrased or bypassed English text
- Integrates with major LMS platforms and exports PDF or CSV reports
Where it doesn't
- No free plan for individual or self-serve evaluation
- Pricing is quote-based and depends on institution size and requirements
- Focused on AI-writing detection rather than conventional similarity checking
MOSS — where it wins
- Free for non-commercial use with account registration
- Analyzes source code across 24 listed programming languages
- Highlights matching passages and excludes expected shared code
Where it doesn't
- Designed for non-commercial use
- Requires Linux submission script for file submission
- Results indicate similarity and require human review

Turnitin AI Writing Detection9.4/10 · Pricing on request
A focused institutional tool for identifying text that may be AI-generated or modified.
Visit Turnitin Full verdict →
MOSS8.8/10 · Free plan
A free code-similarity checker for programming courses, not web or academic-document plagiarism.
Visit MOSS Full verdict →

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated 7 Oct 2026 · How we research and update