PrePostSEO Plagiarism Checker

6.9easy start · #14 of 31
in Plagiarism Checkers

Free to practise onnot on record
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Android, api, iOS, Mac, Web, Windows. Paid plans from $0.35/mo.

PrePostSEO Plagiarism Checker is ranked #14 of 31 in plagiarism checkers on The Geeks Club. It runs on Android, API, iOS, macOS, Web, Windows. Paid plans start at $0.35/mo.

PrePostSEO Plagiarism Checker plans and pricing

All plans

Basic (all-in-one, annual billing) $4.17/yr $50 billed annually 5K words per submission · 50K search queries · 150K Humanizer 2.0 queries · plagiarism checker · deep search · 24/7 support prepostseo.com · 4 Oct 2026

Yearly (plagiarism checker) $5.25/yr $63 billed annually 2.5K words per submission · 125K submissions · unlock all modes · no ads · no captcha prepostseo.com · 4 Oct 2026

Monthly (plagiarism checker) $7/mo billed monthly 2.5K words per submission · 10K submissions · unlock all modes · no ads · no captcha prepostseo.com · 4 Oct 2026

Basic (plagiarism checker) $7.50/yr $81 billed annually 10K words per submission · 60K sentences · approximate 420K words · approximate 1525 pages · deep search · no ads or captcha · 24/7 support prepostseo.com · 4 Oct 2026

Standard (plagiarism checker) $8.33/yr $100 billed annually 20K words per submission · 120K sentences · approximate 840K words · approximate 3050 pages · deep search · no ads or captcha · 24/7 support prepostseo.com · 4 Oct 2026

Standard (all-in-one, annual billing) $12.50/yr $150 billed annually 15K words per submission · 200K search queries · 450K Humanizer 2.0 queries · plagiarism checker · deep search · 24/7 support prepostseo.com · 4 Oct 2026

Compared on plagiarism checkers

Free plan: Yes
Paid from: $5.25/mo
API access: Yes

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The record

Purpose: The checker detects copied or duplicate content and reports the plagiarism percentage and matched sources.
Detection: It compares submitted text with online sources using different search engines and says it can identify incremental, patchwork, and accidental plagiarism.
Input and files: Users can paste text or upload .doc, .docx, .pdf, and .txt files for checking.
Reports: The checker provides plagiarism and unique-content percentages, matched-source URLs, and downloadable HTML or PDF reports.
Writing tools: The page links plagiarism results to paraphrasing, sentence rewriting, and citation-generation tools.
Languages: The checker supports multiple languages, with French, Dutch, and Spanish given as examples.
Integrations: The maker says its plagiarism-checker API can be integrated with a website or online platform, and it lists a WordPress plugin in its services.
Privacy: The privacy policy says plagiarism-checking text and files are not saved or shared with third parties and are removed after processing.
Security: The privacy policy says data in transit is protected with SSL/TLS encryption and stored data uses physical, technical, and logical security measures.
Mobile and desktop apps: The checker page lists Android and iOS apps and Windows and Mac applications.
Free usage: The maker says visitors and registered basic users can check limited words for free; its About page states free users get 500 search queries per month.
Limits: The checker page lists 10,000 words for Basic Premium, 20,000 for Standard Premium, and 25,000 for Company Premium, while the plans page also describes word limits per submission.
Audience: The maker describes the checker as suitable for students, teachers, researchers, content writers, and bloggers.
Support: The pricing page includes 24/7 support with its paid plan tiers.
Price from: $0.35/mo

Where it ranks on The Geeks Club

Best Plagiarism Checkers in 2026#14 of 31
Best AI Plagiarism Checkers in 2026#13 of 26

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Sources

prepostseo.com/plagiarism-checker· checked 4 Oct 2026
prepostseo.com/privacy-policy· checked 4 Oct 2026
prepostseo.com/about· checked 4 Oct 2026
prepostseo.com/plans· checked 4 Oct 2026