Check-Plagiarism vs SmallSEOTools Plagiarism Checker

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.

SmallSEOTools Plagiarism Checker compares submitted text with online sources and returns a report identifying matches. Users can paste text, upload files from local or cloud storage, or check a URL. Upload formats include.doc,.docx,.txt,.tex,.rtf,.odt, and.pdf. Reports show duplication scores, exact and partial matches, flagged sentences, and source URLs. Quotations, references, and other properly attributed material can be excluded from the similarity score. The checker says it detects paraphrased content and synonym replacements as well as exact matches, and supports checks in more than 25 languages. Reports can be downloaded in PDF or Word format. The free plan allows up to 1,000 words per scan; paid plans start at $9.80/mo. An API is documented for plagiarism checks and account status, and a WordPress plugin checks content from the dashboard after an API is added in its settings. The product page says submissions are processed through a secure connection and remain confidential after analysis.