JPlag vs Plagiarisma
JPlag
github.comPlagiarisma
plagiarisma.netSide by side
| Figure | JPlag | Plagiarisma |
|---|---|---|
| Price from | Free | $8.25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | — |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 8 |
| Spec score · Plagiarism Detection Software | 8.8 (#9) | 9.0 (#6) |
| Languages | The README lists support for Java, C, C++, C#, Python, JavaScript, TypeScript, Go, Kotlin, R, Rust, Swift, Scala, LLVM IR, Scheme, EMF, SCXML, text, and multi-language submissions, with varying maturity levels. | The homepage says the checker supports more than 190 languages. |
| 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 on GitHub and provides a Q&A discussion section. | The contact page lists [email protected] and says premium members should include a valid order ID when reporting issues or sending suggestions. |
| What it does | JPlag compares programs pairwise to identify likely source-code plagiarism and collusion. | Plagiarisma checks pasted text, uploaded documents, and URLs for matching passages and reports a uniqueness score. |
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 software for finding pairwise similarities among programs that may indicate source-code plagiarism or collusion. It examines programming-language syntax and program structure, helping identify overlap even when code has been partly obfuscated. Analysis runs locally on the user’s machine, and the project says no data is sent externally. Comparisons are between submitted programs rather than internet sources. Listed language support includes Java, C, C++, C#, Python, JavaScript, TypeScript, Go, Kotlin, R, Rust, Swift, Scala, LLVM IR, Scheme, EMF, SCXML, text, and multi-language submissions, with varying maturity. Users can run the command-line interface or Java API, launch a report viewer from the CLI, or add JPlag through Maven Central. Reports show at most 2,500 pairs by default, adjustable with the -n option. Lower minimum matching-token lengths increase sensitivity but can also increase false positives. Running or building 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.