Copyscape vs PrePostSEO Plagiarism Checker
Copyscape
copyscape.com
PrePostSEO Plagiarism Checker
prepostseo.comSide by side
| Figure | Copyscape | PrePostSEO Plagiarism Checker |
|---|---|---|
| Price from | $4.95/mo | $0.63/mo |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 5 | 8 |
| Spec score · Plagiarism Checkers | 9.2 (#2) | 7.6 (#21) |
| Spec score · AI Plagiarism Checkers | 9.2 (#2) | 7.6 (#19) |
| Purpose | Copyscape checks web content and new human- or AI-generated content for plagiarism and duplicate text found online. | The checker detects copied or duplicate content and reports the plagiarism percentage and matched sources. |
| Support | Copyscape accepts questions, comments, and suggestions through its contact form. | The pricing page includes 24/7 support with its paid plan tiers. |
Plans
Copyscape
- Free CopyscapeFree
- Copyscape Premium$0.03, paid once
- Copysentry Weekly protection$4.95 a month
- Copysentry Premium daily protection$19.95 a month
- Copyscape EnterprisePriced on request
PrePostSEO Plagiarism Checker
- Monthly (plagiarism checker)$7 a month
- Basic (plagiarism checker)$7.50 a year
- Basic (all-in-one, annual billing)$50 a year
- Yearly (plagiarism checker)$63 a year
- Standard (plagiarism checker)$100 a year
- Standard (all-in-one, annual billing)$150 a year
- Business (plagiarism checker)$183.60 a year
- Company (all-in-one, annual billing)$350 a year
In their own words
Copyscape
Copyscape checks web pages and newly written human- or AI-generated content for plagiarism and duplicate text found online. Its free checker scans a URL and presents a word-by-word comparison of results, but shows no more than 10 search results and limits scans per website. Premium accepts pasted text as well as PDF and Word uploads for originality checks. Its Batch Search can process up to 10,000 pages in one operation, with each page billed like a regular search. The Premium API can automate plagiarism and AI checks and return results in JSON, XML, or HTML; a WordPress plugin supports checks in a WordPress workflow. Premium users can create a private index of their own content, accessible only through their Copyscape account. Copysentry monitors selected pages daily or weekly and emails alerts when it finds copies. Enterprise can be hosted on-premises or in a private cloud. Copyscape says it uses Google for search and then processes results with proprietary algorithms. It warns that AI detector results may misclassify human or AI text and should not be the sole basis for disciplinary action.
PrePostSEO Plagiarism Checker
PrePostSEO Plagiarism Checker examines submitted writing for copied or duplicate content and reports plagiarism and unique-content percentages, along with URLs for matched sources. It compares text with online sources using different search engines and says it can identify incremental, patchwork, and accidental plagiarism. Users can paste text or upload.doc,.docx,.pdf, and.txt files, then download reports in HTML or PDF. The checker supports multiple languages, with French, Dutch, and Spanish among the examples. Results link to paraphrasing, sentence rewriting, and citation-generation tools. The maker offers API integration for websites or online platforms and lists a WordPress plugin. Android and iOS apps and Windows and Mac applications are listed. Visitors and registered basic users can check a limited amount for free; the maker describes free users as receiving 500 search queries per month. Paid checker plans start at $5.25 per month when billed annually. The privacy policy says submitted text and files are removed after processing and are not saved or shared with third parties.