Viper

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Viper is ranked #12 of 31 in plagiarism checkers on Inferse. It runs on Web.

Compared on plagiarism checkers

Free plan: Noscanmyessay.com
Source coverage: web_academic_and_publisherscanmyessay.com
Supported file formats: html, htm, txt, rtf, xml, md, pdf, docx, doc, pptx, ppt, odt, epub, odp, ppsx, pages, xlsx, xlsscanmyessay.com
API access: Yesscanmyessay.com
Report export: pdfscanmyessay.com
AI writing check: Yesscanmyessay.com

Facts

Purpose: Viper checks documents for plagiarism and AI-generated content.scanmyessay.com · 4 Oct 2026
Sources: Viper says it checks against 16,000+ open-access journals, 60 trillion websites and search engines, 1M+ optional internal documents, and 20+ code repositories.scanmyessay.com · 4 Oct 2026
Reports: Viper provides reports with highlighted matches, source URLs and scores, and downloadable PDF reports.scanmyessay.com · 4 Oct 2026
Language support: Viper says it supports over 100 languages and cross-language matching across more than 30 languages.scanmyessay.com · 4 Oct 2026
File formats: Viper lists support for formats including HTML, TXT, RTF, XML, Markdown, PDF, DOCX, PPTX, ODT, EPUB, XLSX and more.scanmyessay.com · 4 Oct 2026
Scan controls: Users can adjust scan sensitivity, exclude references, quotes, citations and tables of contents, and bulk scan up to five files at once.scanmyessay.com · 4 Oct 2026
Integration: Viper lets users upload documents from Google Drive and supports signing in with a Google account.scanmyessay.com · 4 Oct 2026
Confidentiality: Viper says repository storage is optional and stored documents are not shared publicly; users can request permanent deletion through support.scanmyessay.com · 4 Oct 2026
Payment security: Viper says payment providers process card details directly and the site does not store them.scanmyessay.com · 4 Oct 2026
Support: Viper offers support through LiveChat and email for paid scans.scanmyessay.com · 4 Oct 2026
Platform availability: Viper is an online app accessible through standard web browsers on any platform and is no longer available as downloadable software.scanmyessay.com · 4 Oct 2026
Free scan limit: The terms state that the free service is limited to one scan of up to 5,000 words per document.scanmyessay.com · 4 Oct 2026
Intended users: Viper says it is designed for students and also serves institutions, schools, universities, businesses and professionals.scanmyessay.com · 4 Oct 2026