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Plagius

plagius.com

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Spec score 7.9 #13 of 31 in Plagiarism Checkers

What it is

Plagius Desktop analyzes academic papers and other documents for possible plagiarism, checking the internet or local files. It supports Word, PDF, OpenOffice, PPT, HTML, RTF, and plain-text formats. Reports can identify suspicious phrases and sources, display URLs with similarity percentages, estimate suspected-plagiarism percentages, and show analysis-quality indicators; results can be opened in a browser or exported as HTML. Its V5 AI detector analyzes paragraphs in context and returns an AI-generation probability and confidence level. The site says it recognizes signals from more than 15 models, including Gemini 3.7, GPT 5.6, and Claude 5. Professional desktop plans add local and network-share searches, batch analysis, direct URL analysis, and file comparisons. The maker says desktop analysis is performed locally, but external searches may send text fragments, usually 7 to 13 words, to search engines. AI detection may send isolated paragraphs to Plagius servers, where excerpts are deleted within up to 48 hours. A free demo runs analysis but reveals only some results. Plagius One is browser-based and initially limited to invited users. Plagius Basic costs $6.90, paid once; its license lasts 30 days and is for one Windows computer. The maker cautions that automated results need manual review and cannot alone confirm plagiarism.

Spec sheet

Purpose
Plagius Desktop analyzes academic papers and documents for suspected plagiarism by searching the internet or local files.Read 3 Oct 2026 · plagius.com
Trial
A free demo activation key is available; the demo runs the analysis but displays only some result information.Read 3 Oct 2026 · plagius.com
Support
The maker advertises free email support and lists [email protected] for help.Read 3 Oct 2026 · plagius.com
Headquarters
Porto Alegre, BrazilRead 28 Sep 2026 · plagius.com
AI data handling
The AI detection feature may send isolated document paragraphs to Plagius servers, where excerpts are deleted within up to 48 hours after analysis.Read 3 Oct 2026 · plagius.com
AI detection
The V5 model analyzes paragraphs in context and reports an AI-generation probability and confidence level.Read 3 Oct 2026 · plagius.com
AI model coverage
The site says AI detection recognizes signals from more than 15 models, including Gemini 3.7, GPT 5.6 and Claude 5.Read 3 Oct 2026 · plagius.com
Credit unit
Plagius One says one credit is equivalent to analyzing one word.Read 3 Oct 2026 · plagius.one
Desktop processing
The maker says desktop analysis is performed locally and the full document is not sent in its entirety to its servers.Read 3 Oct 2026 · plagius.com
External searches
Plagius says search engines may receive fragments of analyzed text, usually 7 to 13 words, and advises against using external searches for sensitive or confidential data.Read 3 Oct 2026 · plagius.com
File formats
Supported formats include Word, PDF, OpenOffice, PPT, HTML, RTF and plain text.Read 3 Oct 2026 · plagius.com
Plagius One availability
Plagius One is browser-based, requires no installation, and the site says access is initially limited and by invitation.Read 3 Oct 2026 · plagius.one
Professional features
Professional includes local search across computer files or network shares, batch analysis, direct URL analysis and cross-comparison between files.Read 3 Oct 2026 · plagius.com
Reports
Reports show suspicious phrases and sources, URLs with similarity percentages, suspected-plagiarism percentages and analysis quality indicators; results can be opened in a browser or exported as HTML.Read 3 Oct 2026 · plagius.com
Usage caveat
The maker says automated results cannot confirm plagiarism on their own and highlighted passages should be manually reviewed.Read 3 Oct 2026 · plagius.com

Plans and prices

Plagius Basic $6.90, paid once One-time payment; license valid for 30 days One computer · Windows only · Internet plagiarism search · No AI detection · Free support Read 3 Oct 2026 · plagius.com
Plagius One Basic $7 a month Recurring monthly billing; automatic renewal until cancellation 8,000 credits · Plagiarism check · AI detection · Free email support Read 3 Oct 2026 · plagius.one
Plagius One Advanced $15.50 a month Recurring monthly billing; automatic renewal until cancellation 20,000 credits · Plagiarism check · AI detection · Free email support Read 3 Oct 2026 · plagius.one
Plagius Pro 12 $15.90, paid once One-time payment; license valid for 12 months One computer · Windows and macOS · Local and batch comparison · Unlimited analyses · AI detection · URL analysis · Free support Read 3 Oct 2026 · plagius.com
Plagius Pro 24 $22.90, paid once One-time payment; license valid for 24 months One computer · Windows and macOS · Local and batch comparison · Unlimited analyses · AI detection · URL analysis · Free support Read 3 Oct 2026 · plagius.com
Plagius One Professional $35 a month Recurring monthly billing; automatic renewal until cancellation 50,000 credits · Plagiarism check · AI detection · Free email support Read 3 Oct 2026 · plagius.one
Plagius One Basic $58.80 a year $58.80 per year (= $4.90/month, billed annually) 96,000 credits · Plagiarism check · AI detection · Free email support Read 3 Oct 2026 · plagius.one
Plagius One Advanced $128.40 a year $128.40 per year (= $10.70/month, billed annually) 240,000 credits · Plagiarism check · AI detection · Free email support Read 3 Oct 2026 · plagius.one
Plagius One Professional $294 a year $294.00 per year (= $24.50/month, billed annually) 600,000 credits · Plagiarism check · AI detection · Free email support Read 3 Oct 2026 · plagius.one

Every Plagius plan and price →

Strong points and limits

Strong points

  • Reports show suspicious phrases, sources, and similarity percentages
  • V5 detector provides AI probability and confidence
  • Professional adds local, batch, and URL analysis
  • Free email support is advertised

Limits

  • Basic license lasts 30 days
  • Basic is Windows-only and has no AI detection
  • Demo displays only some result information
  • External searches may send text fragments

Who it suits

Plagius suits students, researchers, and other document reviewers who need plagiarism checks and AI-writing signals. Those handling sensitive material should note what text may be sent during external searches or AI detection.

Verdict

Plagius offers document checks, detailed reports, and contextual AI detection, with broader local-search tools on Professional desktop plans. Treat flagged passages as leads for manual review, not proof of plagiarism.

Where Specifiction places it

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