Decision Support · Side-by-side
Compare pricing, strengths, and use cases so it is easier to pick the right fit.
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AI Detector by Plagium
Best overallFor most everyday users, Plagium AI Detector is the better choice because it offers a free tier (10 searches/day) and combines AI detection with plagiarism checking in one fast tool. DupliChecker AI Detector wins if you need to analyze many files at once or work with multiple languages, but its free tier is ad-heavy and pricing is unclear. The single biggest difference: Plagium gives you a free daily allowance; DupliChecker hides its pricing.
DupliChecker AI Detector
AI Detector by Plagium
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Key differences
Facts side by side
| DupliChecker AI Detector | AI Detector by Plagium | |
|---|---|---|
| Free plan | ||
| Mobile app | ||
| API access |
Common questions
For short essays (under 1,000 words), Plagium is better because it's free daily and fast. For long essays or batch checking multiple papers, DupliChecker wins with its file upload and multi-language support — but you'll have to deal with ads and unclear pricing.
No. Neither DupliChecker AI Detector nor Plagium has a mobile app. You can open their websites in a phone browser, but the interfaces are not optimized for small screens — expect a clunky experience.
Both tools can falsely flag formal human writing as AI. DupliChecker tends to be more sensitive (more false positives on academic writing), while Plagium is more conservative. Neither is perfect — always use them as a guide, not a definitive verdict.
No. Plagium gives you 10 free searches per day with a character limit (around 1,000 characters per search). If you need more, you can buy a pay-as-you-go plan or subscription. DupliChecker's free tier exists but is ad-heavy and limited.
Yes, both tools accept URLs. Paste the link and they'll fetch the text for analysis. Plagium also lets you upload documents (pdf, docx, txt), and DupliChecker supports the same formats plus batch upload.
Plagium is simpler: paste text or a URL, click 'Analyze', and see results in seconds. DupliChecker has more steps (account creation, language settings, heatmap interpretation) and a busier interface, so it's less beginner-friendly.
Plagium wins for everyday users with its free daily searches and simplicity; DupliChecker is better for power users who need batch analysis and multi-language support, but its hidden pricing is a drawback.
If you just need a quick, free check on a paragraph or short essay, start with Plagium — it's easy, fast, and gives you 10 free searches every day. If you're dealing with long documents in multiple languages or need to scan many files at once, DupliChecker is more powerful, but be ready for ads and unclear pricing. For most everyday users, Plagium is the safer bet.
Detail pages: DupliChecker AI Detector · AI Detector by Plagium
