JPlag vs Plagiarisma
JPlag
jplag.ipd.kit.eduPlagiarisma
plagiarisma.netSide by side
| Figure | JPlag | Plagiarisma |
|---|---|---|
| Price from | Free | $8.25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| Linux | Yes | — |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 8 |
| Spec score · Plagiarism Checkers | 8.0 (#10) | 9.1 (#4) |
| Data handling | The project states that analysis runs locally and that source code and plagiarism results are not uploaded or sent externally. | The company says standard-check submissions are not added to a public database or shared with other users. |
| Headquarters | Karlsruhe, Germany | 71-75 Shelton St, London WC2H 9JQ, United Kingdom |
| Purpose | JPlag finds pairwise similarities among programs to detect source-code plagiarism and collusion. | The online checker scans text against web sources, books, and academic papers for originality. |
| Support | The project directs users to report bugs and issues and provides [email protected] for other inquiries. | The contact page lists [email protected] and says premium members should include a valid order ID when reporting issues or sending suggestions. |
Plans
Plagiarisma
- Plagiarisma Desktop Plagiarism CheckerFree
- Standard checksFree
- One-day subscription$2, paid once
- One-month subscription$10, paid once
- Three-month subscription$25, paid once
- Six-month subscription$49, paid once
- One-year subscription$99 a year
- Paid featuresPrice not published
In their own words
JPlag
JPlag is free, open-source software for finding pairwise similarities among submitted programs. It examines program syntax and structure to help detect source-code plagiarism and collusion, especially in student programming exercises, and can also identify duplicated or stolen software parts. It does not compare submissions with the internet. Supported inputs include Java, C, C++, C#, Python, JavaScript, TypeScript, Go, Kotlin, R, Rust, Swift, Scala, LLVM IR, Scheme, EMF, SCXML, text, and multi-language projects. JPlag runs locally, with the project stating that source code and plagiarism results are not sent externally. You can use its command-line interface, Java API, or Maven Central dependency. A bundled report viewer opens generated or existing reports. Base-code directories can exclude shared starter code, while matching-token sensitivity is adjustable. The default report lists up to 2500 comparison pairs, configurable with -n. Running or building it requires Java SE 25.
Plagiarisma
Plagiarisma is an originality checker that compares text with web sources, books and academic papers. Users can paste text, enter a URL or upload a document in formats including PDF, DOCX, RTF, TXT, HTML, spreadsheets, presentations and ebooks. Its homepage says the checker supports more than 190 languages. The service runs on the web and has a Windows desktop download listed as version 2.0 for.NET on Windows x86/x64. Desktop tools include plagiarism scanning, AI content detection, paraphrasing and APA citation generation. A Google Docs add-on offers checking, paraphrasing, summarizing and AI detection; its listing allows five free document scans per day, with paid features available by monthly subscription. A free plan is listed, including a Windows desktop checker at free. The company says it does not store private texts in public databases. Its FAQ says premium membership orders may be refunded within three days, while trial orders are not refundable.