Plagius

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Plagius is ranked #20 of 31 in plagiarism checkers on Inferse. It runs on macOS, Web, Windows. There is no free plan. A free trial is offered. Paid plans start at $0.41/mo.

Compared on plagiarism checkers

Free plan: Noplagius.com
Source coverage: web_onlyplagius.com
Supported file formats: DOC, DOCX, PDF, OpenOffice, PPT, HTML, RTF, TXTplagius.com
LMS integrations: Noplagius.com
API access: Noplagius.com
AI writing check: Yesplagius.com

Facts

Purpose: Plagius Desktop analyzes academic papers and documents for suspected plagiarism by searching the internet or local files.plagius.com · 3 Oct 2026
AI detection: The V5 model analyzes paragraphs in context and reports an AI-generation probability and confidence level.plagius.com · 3 Oct 2026
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.plagius.com · 3 Oct 2026
File formats: Supported formats include Word, PDF, OpenOffice, PPT, HTML, RTF and plain text.plagius.com · 3 Oct 2026
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.plagius.com · 3 Oct 2026
Professional features: Professional includes local search across computer files or network shares, batch analysis, direct URL analysis and cross-comparison between files.plagius.com · 3 Oct 2026
Desktop processing: The maker says desktop analysis is performed locally and the full document is not sent in its entirety to its servers.plagius.com · 3 Oct 2026
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.plagius.com · 3 Oct 2026
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.plagius.com · 3 Oct 2026
Trial: A free demo activation key is available; the demo runs the analysis but displays only some result information.plagius.com · 3 Oct 2026
Usage caveat: The maker says automated results cannot confirm plagiarism on their own and highlighted passages should be manually reviewed.plagius.com · 3 Oct 2026
Support: The maker advertises free email support and lists [email protected] for help.plagius.com · 3 Oct 2026
Plagius One availability: Plagius One is browser-based, requires no installation, and the site says access is initially limited and by invitation.plagius.one · 3 Oct 2026
Credit unit: Plagius One says one credit is equivalent to analyzing one word.plagius.one · 3 Oct 2026