kitio.aiAdded Oct 28, 2026
Check-Plagiarism
Freemium · $14.99/moPlagiarism checker with AI detector, paraphraser and grammar tools
What is Check-Plagiarism?
Check-Plagiarism scans pasted text or uploaded files against web sources and shows matched passages and a similarity score, with an AI content detector, paraphrasing tool and grammar checker alongside. It serves students, teachers and writers, with a free tier supported by ads.
Results are broken down sentence by sentence with the matched sources, and you can rewrite flagged lines or add citations directly from the report. A keyword density view and downloadable reports help editors review drafts.
Free users get limited searches and up to three files at a time, while premium plans allow up to 20 files and longer texts per search, deep search, no ads and plagiarism APIs. The interface is available in more than 20 languages.
Features
- Plagiarism detection
- Sentence-level source matching
- AI content detector
- Paraphrasing tool
- Bulk file checks
- Plagiarism API
Tags
Releases
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Organization
Check-Plagiarism
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- $14.99/mo
- Billing frequency
- Monthly
Check-Plagiarism plans
Free
Free
- Limited searches
- Up to 1,000 words per search
- Ads shown
Weekly
$4.99/week
- 10,000 words
- 7,000 words per search
Monthly
$14.99/mo
- 35,000 words
- 20,000 words per search
- No ads, detailed reports
Annual
$99.99/yr
- 450,000 words
- All premium tools
Prices in USD, checked Oct 29, 2026. Plans change often, so confirm on the Check-Plagiarism site.Official pricing
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Pros and cons
Pros
- Free checks without an account
- Rewrite flagged text from the report
- API available on paid plans
Cons
- Free tier shows ads and captchas
- Free checks limited to 1,000 words
- Word quotas on every paid plan
Prompts & results
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Q&A
What is Check-Plagiarism?
Check-Plagiarism scans pasted text or uploaded files against web sources and shows matched passages and a similarity score, with an AI content detector, paraphrasing tool and grammar checker alongside. It serves students, teachers and writers, with a free tier supported by ads.
How many files can I check at once on Check-Plagiarism?
Free users can select up to 3 files per search, and premium users up to 20.
Does Check-Plagiarism have an API?
Yes. Plagiarism APIs are listed among the paid plan features.
How much does Check-Plagiarism cost?
Check-Plagiarism is freemium, with paid plans from $14.99/mo.
Is there a free version of Check-Plagiarism?
Yes. Check-Plagiarism has a free plan, and paid plans add more usage and features.
What are the main features of Check-Plagiarism?
Plagiarism detection, Sentence-level source matching, AI content detector, Paraphrasing tool, Bulk file checks, Plagiarism API.
Who makes Check-Plagiarism?
Check-Plagiarism is made by Check-Plagiarism.
What are the best alternatives to Check-Plagiarism?
Popular alternatives include Paraphraser.io, TextAdviser, Rephrasely.