Check-Plagiarism vs Proofademic
Check-Plagiarism
check-plagiarism.comProofademic
proofademic.aiSide by side
| Figure | Check-Plagiarism | Proofademic |
|---|---|---|
| Price from | $4.17/mo | $15/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 10 | 4 |
| Spec score · AI Plagiarism Checkers | 8.7 (#7) | 7.7 (#17) |
| Integrations | The API page says the API can integrate with any CMS and names WordPress, widgets, and Android among supported platforms. | The privacy policy says Proofademic requests Google Docs access to analyze a document the user explicitly selects; the homepage says LMS integrations are planned. |
| Languages | The checker page claims support for over 20 languages. | Proofademic says it supports review of essays, research papers, articles, and reports in 23 languages. |
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
Proofademic
- FreeFree
- Essential$15 a month
- Premium$25 a month
- Professional$45 a month
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.
Proofademic
Proofademic analyzes submitted writing for AI-generated content and plagiarism, producing an overall score and sentence-by-sentence breakdown. Its listed checks include AI text, ChatGPT, paraphrase, multilingual and plagiarism detection, as well as Batch Scan. Proofademic says it reviews essays, research papers, articles and reports in 23 languages, with model coverage including ChatGPT, GPT-5, Claude and Gemini. Batch Scan lets teams upload documents, sort results by risk, inspect sentence-level evidence and export reports. Developers and platforms can use the AI Image Detector API; a browser-based image detector for individual users is described as coming soon. Proofademic says submitted text is processed automatically, is not used for model training or resale, and is not reviewed by people. It reports a 0.2% document false-positive rate in an evaluation of 4,200 fully human-authored academic texts, while advising that results support human review. The Free plan is free and includes 1,000 words and a 3-day trial. Paid plans are $15 a month for Essential, $25 a month for Premium and $45 a month for Professional.