PrePostSEO Plagiarism Checker

PrePostSEO Plagiarism Checker compares submitted writing with online sources and reports plagiarism and unique-content percentages, along with URLs for matched sources. The maker says it uses different search engines and can identify incremental, patchwork, and accidental plagiarism. Users can paste text or upload .doc, .docx, .pdf, or .txt files, then download reports in HTML or PDF. It supports 20 languages, including French, Dutch, and Spanish, and links results to paraphrasing, sentence rewriting, and citation-generation tools. The maker also offers API integration for websites or online platforms and lists a WordPress plugin. Android and iOS apps, Windows and Mac applications, and web access are listed. Visitors and registered basic users can check a limited amount for free; the maker states free users get 500 search queries per month. Paid plans start at $5.25/mo (annual). The privacy policy says submitted text and files are removed after processing and are not saved or shared with third parties.

PrePostSEO combines source matching, downloadable reports, and links to related writing tools. Free use is limited, and paid plan submission limits differ.

It may suit students, teachers, researchers, content writers, and bloggers who need plagiarism checks and matched-source details. API access may also suit teams integrating checks into a website or platform.

Overview

PrePostSEO Plagiarism Checker scans submitted text against online sources and reports matched material and its share of the text. It suits writers, students, educators, and researchers who want a checker with downloadable reports and related writing tools; its appeal is tempered by limited free use and different paid submission caps.

Key features

Users can paste text or upload DOC, DOCX, PDF, and TXT files. The checker reports plagiarism and unique-content percentages, links to matched sources, and exports in HTML or PDF. Those source links and export options make it easier to review or share a result, though the reported match is a starting point for judgment rather than a substitute for checking context and citations.

PrePostSEO says its checker searches online sources through different search engines and can identify incremental, patchwork, and accidental plagiarism. It supports 20 languages, including French, Dutch, and Spanish, making it relevant beyond English-language writing. The page also connects results to paraphrasing, sentence rewriting, and citation-generation tools; these can help with follow-up work, but the checker itself is the central product.

The maker offers an API for integration into websites and online platforms, and lists a WordPress plugin among its services. Its privacy policy says submitted text and files are not saved or shared with third parties and are removed after processing; it also describes SSL/TLS protection in transit and physical, technical, and logical safeguards for stored data.

Pricing

There is a free plan for visitors and registered basic users, with limited words per check; the maker also states free users receive 500 search queries per month. That can suit occasional checks, but the paid plans are the practical choice for recurring work or larger submissions. Paid tiers include 24/7 support.

• Yearly (plagiarism checker): $5.25 a year, billed $63 annually, with 2.5K words per submission, 125K submissions, all modes, no ads, and no captcha. This has the lowest stated entry price, but the per-submission ceiling is lower than the checker’s Basic and Standard plans.
• Basic (plagiarism checker): $7.50 a year, billed $81 annually, with 10K words per submission, 60K sentences, deep search, no ads or captcha, and 24/7 support. Its larger submission allowance fits users who regularly check longer pieces.
• Standard (plagiarism checker): $8.33 a year, billed $100 annually, with 20K words per submission, 120K sentences, deep search, no ads or captcha, and 24/7 support. It doubles Basic’s per-submission limit for longer documents.
• Business (plagiarism checker): $15.30 a year, billed $183.6 annually, with 25K words per submission, 300K sentences, deep search, no ads or captcha, and 24/7 support. It raises the submission ceiling to 25K words for heavier use.
• Monthly (plagiarism checker): $7 a month, billed monthly, with 2.5K words per submission, 10K submissions, all modes, no ads, and no captcha. Month-to-month billing avoids an annual commitment, but retains the smallest listed submission limit.
• Basic (all-in-one, annual billing): $4.17 a year, billed $50 annually, with 5K words per submission, 50K search queries, 150K Humanizer 2.0 queries, plagiarism checking, deep search, and 24/7 support. This bundles other tools but allows fewer words per submission than the checker-only Basic plan.
• Standard (all-in-one, annual billing): $12.50 a year, billed $150 annually, with 15K words per submission, 200K search queries, 450K Humanizer 2.0 queries, plagiarism checking, deep search, and 24/7 support. It offers more bundled usage than the all-in-one Basic tier, but a lower submission cap than checker-only Standard.
• Company (all-in-one, annual billing): $29.17 a year, billed $350 annually, with 25K words per submission, 500K search queries, 1.05M Humanizer 2.0 queries, plagiarism checking, deep search, and 24/7 support. It is the broadest listed all-in-one allowance.

The checker page also describes Basic Premium, Standard Premium, and Company Premium limits of 10,000, 20,000, and 25,000 words, while the plans distinguish word limits per submission. Buyers should compare the stated submission cap for the specific plan they need.

Platforms

PrePostSEO lists web access, Android and iOS apps, and Windows and Mac applications, alongside API access. That range suits users who want to check work across devices or integrate checking into a platform.

Who it's for

Students and researchers can use source matching and downloadable reports to review drafts; teachers can use the results as one input when examining submitted work. Content writers and bloggers may value the related rewriting and citation tools. For teams or publishers with frequent long documents, the 20K- or 25K-word checker plans are more suitable than the 2.5K-word options.

Pros and cons

• Pros: Matched-source URLs, percentage results, and HTML or PDF exports make findings easier to inspect and share.
• Pros: File uploads, multiple languages, mobile and desktop apps, and API access accommodate varied workflows.
• Pros: Several annual checker tiers raise the per-submission allowance up to 25K words, with deep search and support on the higher plans.
• Cons: Free checking is limited, and the 500 monthly search-query allowance does not describe a per-submission word limit.
• Cons: Paid submission ceilings vary substantially, from 2.5K to 25K words; choosing by price alone could leave frequent long-document users with too little capacity.
• Cons: The all-in-one tiers bundle search and Humanizer 2.0 queries, but their word caps do not always match the checker-only tiers.

Alternatives

For another freemium checker with Android, iOS, web, API, and extension access, consider Smodin Plagiarism Checker; its paid Starter plan checks against web and academic sources and includes all AI tools.

DrillBit is a paid alternative with one-time page bundles that include a similarity report, AI detection, and grammar analysis, for buyers who prefer a fixed page purchase over a recurring plan.

Noplag offers three free checks per month, up to 2,500 words each, against the public web and Common Crawl, so it may suit readers whose needs fit that quota.

PlagAware has a free tier for 10 pages per month and monitoring of up to 30 URLs with a Content Protection Banner, making it an option for that combination of checking and monitoring.

SmallSEOTools Plagiarism Checker offers free scans up to 1,000 words, which may be enough for readers who only need a smaller free check.

Copyscape provides limited free URL scans and search results, and may fit readers who want to check web pages by URL.

Crossref Similarity Check is a paid service with no free plan, for readers considering a paid similarity-checking service.

Originality.ai offers a free AI-detection plan with three scans per day and DOCX, PDF, and DOC uploads, for readers whose priority is AI detection.

For broader comparisons, browse Plagiarism Checkers or AI Plagiarism Checkers.

Verdict

PrePostSEO is a good fit for individuals and small publishing workflows that need source links, exportable reports, and a choice of submission limits across devices. Its strongest reason to choose is the combination of reports, language support, and related writing tools; look elsewhere if free capacity is central or if a 2.5K-word submission limit would interrupt your work.