Plag
Plag: A web-based checker for similarity, paraphrase, citation, and translated plagiarism. Ranked #22 of 31 in Plagiarism Checkers by our editors (7.1/10); pricing: Free plan; best for students wanting paraphrase and citation analysis.
At a glance
- Editor score7.1 / 10
- PricingFree plan
- Best forStudents wanting paraphrase and citation analysis
- Free planYes
- Paid from€14.95/mo
- Web source matchingYes
- Founded2011 · Vilnius, Lithuania
- Facts checked21 Sep 2026
Where it wins
- Checks public web sources and scholarly articles
- Detects paraphrasing, citations, and translated plagiarism
- Highlights matching text with links to sources
Where it doesn't
- Web-only access
- Basic limits usage to 10,000 credits per month
- PRO Unlimited costs €299.95 per month
Our verdict on Plag
Plag is a web-based plagiarism checker and AI detector for students, educators, researchers, writers, and businesses. It compares uploaded documents with public web content and scholarly articles, then highlights matching or paraphrased text. Similarity scoring, plagiarism-risk scoring, citation analysis, real-time checking, and translated-plagiarism detection make it especially relevant to academic writing. The service also offers plagiarism removal, text humanization, proofreading, and related document services.
Pricing is structured around monthly credit allowances. The Basic plan costs €14.95 per month and includes 10,000 credits, plagiarism checking, AI detection, cross-language translated-plagiarism detection, academic articles, and in-depth analysis. Student costs €29.95 per month for 30,000 credits with the same listed feature set. PRO Unlimited costs €299.95 per month and removes the monthly credit limit while retaining those capabilities. A free check and free educator access are advertised, giving prospective users a way to evaluate the service before choosing a paid tier. The main pricing decision is whether the Student allowance is sufficient or whether unlimited credits justify the substantially higher monthly cost.
Plag's strongest distinction is the breadth of its analysis beyond straightforward matching. It combines web and scholarly comparison with paraphrase detection, citation and improper-citation analysis, risk scoring, source links, and translated plagiarism detection. That combination suits students who need to review both originality and academic citation practices across multilingual material. Its web-only delivery keeps the workflow centered on online document checking, while the credit-based plans make usage volume an important consideration. Students and educators should consider Plag when paraphrase, citation, and translated-content analysis matter alongside standard plagiarism checks. Users seeking a non-web workflow or needing high-volume checking without the PRO Unlimited price should look elsewhere.
Your product? Our editors can test Plag in depth and publish a review, labelled as paid · from $149/mo →
Plag pricing
Plag fact sheet
| Free plan | Yes |
|---|---|
| Paid from | €14.95/mo |
| Web source matching | Yes |
| Academic source matching | Yes |
| Supported languages | 129 languages |
| Word limit | Not verified |
| Report export formats | Not verified |
| API access | Not verified |
| LMS integration | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | GDPR |
| Support | Live chat, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | plag.ie |
| Facts checked | 21 Sep 2026 |
Alternatives to Plag
- Turnitin AI Writing DetectionA focused institutional tool for identifying text that may be AI-generated or modified.9.4
- Crossref Similarity CheckA focused manuscript-screening service with academic matching, reports, filters, and API access.9.2
- iThenticateA paid similarity checker built for researchers, publishers, and private repositories.9.0
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Featured on iTechGuides
Plag is listed in our Plagiarism Checkers directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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