Noplag vs Plagiarisma
Noplag
noplag.comPlagiarisma
plagiarisma.netSide by side
| Figure | Noplag | Plagiarisma |
|---|---|---|
| Price from | $9.99/mo | $8.25/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | — |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 4 | 8 |
| Spec score · Plagiarism Checkers | 9.2 (#3) | 9.1 (#4) |
| Spec score · AI Plagiarism Checkers | 9.2 (#3) | 9.2 (#4) |
| Spec score · Plagiarism Detection Software | 9.1 (#4) | 9.0 (#6) |
| Desktop features | The macOS desktop app supports drag-and-drop checks, watch folders, native notifications, automatic updates and OCR for scanned PDFs. | The Windows desktop page lists plagiarism scanning, an AI content detector, an AI paraphrasing tool, and an APA citation generator. |
| Headquarters | San Francisco, United States | 71-75 Shelton St, London WC2H 9JQ, United Kingdom |
| Input methods | Users can paste text, upload DOCX/PDF/TXT/ODT/RTF files or submit a URL for checking. | Users can paste text, check a URL, or upload a document. |
| Languages | Detection is calibrated at launch for English, Spanish, Portuguese, Polish, and Ukrainian. | The homepage says the checker supports more than 190 languages. |
| Support | Free includes community Discord support, Pro includes email support, and Premium includes priority support with a 12-hour response target. | 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 | Noplag checks submitted text or files for plagiarism and returns similarity scores, highlighted overlaps and source links. | 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
Noplag
Noplag is an open-source plagiarism checker with a hosted cloud service and an engine released under Apache 2.0. Its current matching uses winnowing fingerprints and live-web comparison to find verbatim and near-verbatim copying; it does not detect paraphrase. Sources include the open web, Common Crawl, Wikipedia, academic indexes, the Noplag Database and users’ own folders. Submit DOCX, PDF, TXT, ODT or RTF files, paste text or provide a URL. Reports link matches to their sources, display similarity scores and exact overlapping text, and can be exported as PDFs. Detection is calibrated at launch for English, Spanish, Portuguese, Polish and Ukrainian. AI-content detection is marked as coming soon and intended as a separate signal. The free plan allows three checks per month, up to 2,500 words per check, with community Discord support. Pro costs $9.99 a month and includes 50 monthly checks, up to 25,000 words per check, database and academic-index matching, REST API and webhooks, and email support. A 14-day trial is listed.
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.