Check-Plagiarism vs Viper
Check-Plagiarism
check-plagiarism.comViper
scanmyessay.comSide by side
| Figure | Check-Plagiarism | Viper |
|---|---|---|
| Price from | $4.17/mo | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Android | Yes | — |
| API | Yes | — |
| Plans published | 10 | 7 |
| Spec score · AI Plagiarism Checkers | 8.7 (#7) | 6.9 (#23) |
| File formats | The web checker accepts DOC, DOCX, TXT and PDF uploads. | Viper lists support for formats including HTML, TXT, RTF, XML, Markdown, PDF, DOCX, PPTX, ODT, EPUB, XLSX and more. |
| Intended users | The maker identifies students, teachers, researchers, content creators, and digital publishers as users of the service. | Viper says it is designed for students and also serves institutions, schools, universities, businesses and professionals. |
| Language support | The product advertises support for more than 20 languages and exposes numerous localized interfaces. | Viper says it supports over 100 languages and cross-language matching across more than 30 languages. |
| Purpose | The service checks text for plagiarism and reports duplicated sections, similarity percentages, and matching sources. | Viper checks documents for plagiarism and AI-generated content. |
| Reports | Users can save, download and share detailed plagiarism reports, including PDF output. | Viper provides reports with highlighted matches, source URLs and scores, and downloadable PDF reports. |
| Support | The API page advertises 24/7 support for selected API tiers and offers contact for integration questions. | Viper offers support through LiveChat and email for paid scans. |
Plans
Check-Plagiarism
- Weekly$4.99, paid once
- Annual$8.33 a month
- API Basic$10 a month
- API Company$14.99 a month
- Monthly$14.99 a month
- Semi-Annual$16.66 a month
- API Basic Yearly Plan$50 a year
- API Business$50 a month
- API Company / Webmasters$99.99 a year
- API Business / Colleges / Universities$250 a year
Viper
- Small£5, paid once
- Starter£9, paid once
- Standard£14.95, paid once
- Professional£25.95, paid once
- Advanced£34.95, paid once
- Premium£69.95, paid once
- Ultimate£119.95, paid once
In their own words
Check-Plagiarism
Check-Plagiarism is a plagiarism-checking service for students, teachers, researchers, content creators, and digital publishers. It accepts pasted or typed text and DOC, DOCX, TXT, or PDF uploads, with a listed maximum of 7,000 words per document. The checker reports duplicated passages, sentence-level matches, similarity percentages, and matching sources. Its AI is described as detecting paraphrased or lightly edited text as well as exact matches. The service says it checks billions of web pages and provides access to academic databases and publications, with support claimed for more than 20 languages. Reports can be downloaded or shared, including as PDF. Free online use is available with limited searches; registered accounts can increase the limit. Plans include Monthly at $14.99 a month and Annual at $8.33 a month, billed $99.99 every 12 months. API access and LMS integrations are listed.