Check-Plagiarism
Check-Plagiarism checks submitted text and reports duplicated sections, similarity percentages and matching sources.
What Check-Plagiarism is
Check-Plagiarism checks submitted text and reports duplicated sections, similarity percentages and matching sources. Users can paste or type text, or upload DOC, DOCX, TXT or PDF files; the listed maximum document length is 7,000 words. The service says its AI can identify paraphrases and slightly edited passages as well as exact matches. Reports show sentence-level matches, sources and similarity percentages, and can be downloaded or shared. The checker claims support for over 20 languages and says it checks against billions of web pages, with access to academic databases and publications. Its file limits are described inconsistently: one feature description says up to five documents at a time, while the homepage says free users can select at most three and premium users up to 20 per search. Free online use has limited searches, and registered accounts can increase that limit. Paid plans include Monthly at $14.99 a month and Annual at $8.33 a month, billed $99.99 every 12 months. The service also provides an API, which returns matching sentences and URLs in a detailed JSON response.
Good
- Accepts text input and four document formats.
- Reports include sentence-level matches and sources.
- Reports can be downloaded or shared.
- API returns matching sentences and URLs.
Watch out
- Free searches are limited.
- Document limit is 7,000 words.
- File-count limits are described differently across pages.
- Privacy claims differ from policy disclosures.
Who it suits
The service may suit students, teachers, researchers, content creators and digital publishers who need text-matching reports. Its API and CMS integrations may also suit users incorporating checks into a website or workflow.
Verdict
Check-Plagiarism offers text and file checks with match reports, plus API access. Review its differing file limits and privacy statements before submitting sensitive content.
Plans and prices
From Check-Plagiarism's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Weekly | $4.99, paid once | 10,000 words · 34 pages · 7,000 words/search · 1,000-word rephraser · deep search · summarizer · grammar checker · WordPress plugin · no ads · 2× faster · detailed reports · APIs · dedicated manager · weekly |
| Annual | $8.33 a month | 450,000 words · 1,500 pages · 20,000 words/search · 2,000-word rephraser · deep search · summarizer · grammar checker · WordPress plugin · no ads · 2× faster · detailed reports · APIs · $99.99 billed every 12 months |
| API Basic | $10 a month | 10,000 queries/requests · 30 Days |
| Monthly | $14.99 a month | 35,000 words · 116 pages · 20,000 words/search · 1,500-word rephraser · deep search · summarizer · grammar checker · WordPress plugin · no ads · 2× faster · detailed reports · APIs · monthly |
| API Company | $14.99 a month | 35,000 queries/requests · 30 Days |
| Semi-Annual | $16.66 a month | 200,000 words · 666 pages · 20,000 words/search · 2,000-word rephraser · deep search · summarizer · grammar checker · WordPress plugin · no ads · 2× faster · detailed reports · APIs · $100 billed every 6 months |
| API Basic Yearly Plan | $50 a year | 60,000 queries/requests · One Year |
| API Business | $50 a month | 50,000 queries/requests · 24/7 support · 30 Days |
| API Company / Webmasters | $99.99 a year | 450,000 queries/requests · 24/7 support · One Year |
| API Business / Colleges / Universities | $250 a year | 600,000 queries/requests · 24/7 support · One Year |
The facts
Each one read from Check-Plagiarism's own pages, with the date it was checked.
What it does
- AI matching
- The checker says its AI can identify paraphrases and slightly edited text in addition to exact matches.checked 28 Sep 2026
- API availability
- The vendor offers APIs for registered users to embed plagiarism checking in CMS, CRM or LMS systems.checked 15 Oct 2026
- API data claim
- The API page states that text sent through APIs is not stored in the vendor database and that responses arrive within seconds.checked 15 Oct 2026
- API endpoints
- Documented endpoints include /apis for account status and /apis/checkPlag for article checking.checked 15 Oct 2026
- API examples
- Public documentation provides cURL and PHP cURL examples but does not list official SDK packages.checked 15 Oct 2026
- API protocol
- The API documentation requires POST requests, an API-key parameter and returns JSON; GET requests are unsupported.checked 15 Oct 2026
- API request limit
- The documented full-article API accepts up to 5,000 words per request, requiring longer text to be split.checked 15 Oct 2026
- API response
- The API returns a detailed JSON response with sentences and URLs matching the submitted text.checked 28 Sep 2026
- Bulk files
- The site says users can check up to five documents at once, while its interface separately states free users may select three files and premium users 20 files per search.checked 15 Oct 2026
- Documentation depth
- The public API guide covers registration, key retrieval, request method, endpoints, parameters and sample responses, but no self-hosting instructions are shown.checked 15 Oct 2026
- File formats
- The web checker accepts DOC, DOCX, TXT and PDF uploads.checked 15 Oct 2026
- File limit
- The feature description says up to five documents can be checked at once, while the homepage says free users can select at most three files and premium users up to 20 per search.checked 28 Sep 2026
- Input methods
- Users can paste or type text, or upload DOC, DOCX, TXT, or PDF files for checking.checked 28 Sep 2026
- Integrations
- The API page says the API can integrate with any CMS and names WordPress, widgets, and Android among supported platforms.checked 28 Sep 2026
- Intended users
- The maker identifies students, teachers, researchers, content creators, and digital publishers as users of the service.checked 28 Sep 2026
- Languages
- The checker page claims support for over 20 languages.checked 28 Sep 2026
- Language support
- The product advertises support for more than 20 languages and exposes numerous localized interfaces.checked 15 Oct 2026
- Licence
- The opened vendor pages describe a hosted commercial service and do not state an open-source licence.checked 15 Oct 2026
Where it runs
- Android app
- The Android listing links the app to check-plagiarism.com, supports Word, text and PDF uploads, shows source URLs and similarity percentages, and contains ads and in-app purchases.checked 15 Oct 2026
- Android developer facts
- Google Play identifies the developer as Enzipe Apps at HR Tower, Faisalabad, Pakistan, with support contact [email protected].checked 15 Oct 2026
- GetApp pricing
- GetApp lists a starting price of $4.99 per month and both a free version and free-trial fields for the product.checked 15 Oct 2026
The company
- Founded evidence
- The opened company and review pages do not state a founded year; the WordPress profile shows membership since November 2016.checked 15 Oct 2026
Money
- Free use
- The homepage describes a free online checker, and the site says visitors have limited searches while registered accounts can increase the limit.checked 28 Sep 2026
- Limit: ads and free limits
- Capterra reviewers complain about irritating advertisements and limits in the free version that require splitting longer articles.checked 15 Oct 2026
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