Best Plagiarism Detector Alternatives in 2026
The top Plagiarism Detector alternatives are Turnitin AI Writing Detection, Crossref Similarity Check and iThenticate: 15 plagiarism checkers our editors would look at instead of Plagiarism Detector, in our ranking order.
Plagiarism Detector: A broad local document checker for Windows users who need web, academic, and AI checks. Where it falls short: available only on web and windows.
Switching from Plagiarism Detector? For most plagiarism checkers buyers the best Plagiarism Detector alternative is Turnitin AI Writing Detection, built for institutions focused on AI-writing detection. On a budget, PrePostSEO Plagiarism Checker starts at $5.25/mo. Copyscape has a free plan. MOSS offers the most supported languages (24 languages).
Why People Look for a Plagiarism Detector Alternative
- Available only on web and Windows
- Free demo allows 700 words per document and 10 total checks
- Plan pricing is not fully detailed beyond a BRL 150 starting price
Quick Picks by What You Need
- Best overallTurnitin AI Writing Detection9.4
Institutions focused on AI-writing detection
Visit Turnitin AI Writing Detection - Lowest pricePrePostSEO Plagiarism Checker7.9
Paid plans from $5.25/mo
Visit PrePostSEO Plagiarism Checker - Best free optionCopyscape8.9
Has a free plan
Visit Copyscape - Most supported languagesMOSS8.8
24 languages
Visit MOSS
All 15 Plagiarism Detector Alternatives, Ranked
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.
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Best forInstitutions focused on AI-writing detection
- Better than Plagiarism Detector:
- Editor score 9.4 vs 6.7
A focused institutional tool for identifying text that may be AI-generated or modified.
- LMS integration
- Academic source matching
- Web source matching
9.4/10★★★★★Visit Turnitin -
Best forPublishers and journals checking manuscripts
- Better than Plagiarism Detector:
- Editor score 9.2 vs 6.7
A focused manuscript-screening service with academic matching, reports, filters, and API access.
- Academic source matching
- Web source matching
- API access
9.2/10★★★★★Visit Crossref -
Best forResearchers and publishers needing private-repository checks
- Better than Plagiarism Detector:
- Editor score 9.0 vs 6.7
A paid similarity checker built for researchers, publishers, and private repositories.
- LMS integration
- Academic source matching
- Web source matching
9.0/10★★★★☆Visit iThenticate -
Best forWeb publishers and teams checking site content
- Better than Plagiarism Detector:
- Editor score 8.9 vs 6.7
A web-focused plagiarism checker with batch searches, private indexing, and API automation.
- Web source matching
- API access
8.9/10★★★★☆Visit Copyscape -
Best forFree source-code checks across many languages
- Better than Plagiarism Detector:
- Editor score 8.8 vs 6.7
A free code-similarity checker for programming courses, not web or academic-document plagiarism.
8.8/10★★★★☆Visit MOSS -
Best forAcademic institutions needing broad, deep checking
- Better than Plagiarism Detector:
- Editor score 8.7 vs 6.7
A broad academic checker with deep source coverage, workflow tools, and API access.
- LMS integration
- Academic source matching
- Web source matching
8.7/10★★★★☆Try StrikePlagiarism -
Best forSchools needing bulk workflows and automation
- Better than Plagiarism Detector:
- Editor score 8.6 vs 6.7
A page-credit plagiarism checker with AI, academic matching, and school workflows.
- LMS integration
- Academic source matching
- Web source matching
8.6/10★★★★☆Visit DrillBit -
Best forSchools wanting affordable, feature-rich checking
- Better than Plagiarism Detector:
- Editor score 8.5 vs 6.7
A flexible checker with academic matching, authorship verification, reports, APIs, and LMS integrations.
- LMS integration
- Academic source matching
- Web source matching
8.5/10★★★★☆Visit site -
Best forSelf-hosters needing open-source flexibility
- Better than Plagiarism Detector:
- Editor score 8.4 vs 6.7
An open-source checker with self-hosting, academic matching, APIs, and LMS integrations.
- LMS integration
- Academic source matching
- Web source matching
8.4/10★★★★☆Visit Noplag -
Best forUsers combining AI detection with basic plagiarism checks
- Better than Plagiarism Detector:
- Editor score 8.3 vs 6.7
A practical hybrid for sentence-level AI detection and basic plagiarism checking.
- LMS integration
- Academic source matching
- Web source matching
8.3/10★★★★☆Visit Quetext -
Best forTeams prioritizing AI and high-volume scanning
- Better than Plagiarism Detector:
- Editor score 8.2 vs 6.7
A broad AI and plagiarism checker for multilingual, high-volume scanning.
- API access
8.2/10★★★★☆Visit Copyleaks -
Best forContent teams combining plagiarism and AI checks
- Better than Plagiarism Detector:
- Editor score 8.1 vs 6.7
A broad verification platform for teams that need plagiarism and AI detection together.
- API access
8.1/10★★★★☆Visit Originality.ai -
Best forWriters needing simple low-cost web checking
- Better than Plagiarism Detector:
- Editor score 8.0 vs 6.7
A low-cost web checker with broad matching tools, but limited to 1,000 words per free check.
- LMS integration
- Academic source matching
- Web source matching
8.0/10★★★★☆Visit SmallSEOTools -
Best forMobile users needing broad file and language support
- Better than Plagiarism Detector:
- Editor score 7.9 vs 6.7
A broad, mobile-friendly checker with online matching, uploads, reports, and API access.
- Web source matching
- API access
7.9/10★★★★☆Visit PrePostSEO -
Best forUsers wanting plagiarism plus AI writing tools
- Better than Plagiarism Detector:
- Editor score 7.8 vs 6.7
A broad originality checker with AI writing tools, but no free plan or LMS support.
- Academic source matching
- Web source matching
- API access
7.8/10★★★★☆Visit Smodin
Plagiarism Detector Alternatives: Common Questions
What is the best alternative to Plagiarism Detector?
Turnitin AI Writing Detection: #1 in our Plagiarism Checkers ranking, with an editor score of 9.4 out of 10. A focused institutional tool for identifying text that may be AI-generated or modified.
Is there a free alternative to Plagiarism Detector?
Yes. Copyscape, MOSS, PlagiarismCheck.org, Noplag and Quetext AI Detector have a free plan or a free tier (10 of the 15 alternatives on this page).
What is the cheapest paid alternative to Plagiarism Detector?
Of the alternatives here that publish a price, PrePostSEO Plagiarism Checker starts lowest, at $5.25/mo.
Why do people look for Plagiarism Detector alternatives?
Available only on web and Windows; Free demo allows 700 words per document and 10 total checks; Plan pricing is not fully detailed beyond a BRL 150 starting price.
Which Plagiarism Detector alternative has the most supported languages?
MOSS, with 24 languages.
How do I switch from Plagiarism Detector?
Export your data from Plagiarism Detector (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Plagiarism Detector.
How to Switch from Plagiarism Detector
- Export your data from Plagiarism Detector (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Plagiarism Detector.
Plagiarism Detector vs Each Alternative
| # | Tool | Free plan | Paid from | Web source matching | Academic source matching | Score |
|---|---|---|---|---|---|---|
| 26 | Plagiarism Detector | Yes | Yes | Yes | 6.7 | |
| 1 | Turnitin AI Writing Detection | No | Yes | Yes | 9.4 | |
| 2 | Crossref Similarity Check | No | Yes | Yes | 9.2 | |
| 3 | iThenticate | No | $125 one-time | Yes | Yes | 9.0 |
| 4 | Copyscape | Yes | Yes | 8.9 | ||
| 5 | MOSS | Yes | Free | No | No | 8.8 |
| 6 | StrikePlagiarism | No | €2.33/unit usage-based | Yes | Yes | 8.7 |
| 7 | DrillBit | No | $5 one-time | Yes | Yes | 8.6 |
| 8 | PlagiarismCheck.org | Yes | Yes | Yes | 8.5 | |
| 9 | Noplag | Yes | $9.99/mo | Yes | Yes | 8.4 |
| 10 | Quetext AI Detector | Yes | $7.99/mo | Yes | Yes | 8.3 |
| 11 | Copyleaks AI Detector | 8.2 | ||||
| 12 | Originality.ai | Yes | 8.1 | |||
| 13 | SmallSEOTools Plagiarism Checker | Yes | $94.08/yr | Yes | Yes | 8.0 |
| 14 | PrePostSEO Plagiarism Checker | Yes | $5.25/mo | Yes | 7.9 | |
| 15 | Smodin Plagiarism Checker | Yes | $10/mo | Yes | Yes | 7.8 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update