Plagiarism Checker X, LLC

What Plagiarism Checker X, LLC does

Plagiarism Checker X, LLC is a privately held software company founded around 2014-2015 and headquartered at 733 3rd Avenue, New York City. The company develops and distributes Plagiarism Checker X, a Windows desktop application (.NET Framework 4.5.1+) that compares user-submitted documents against an indexed corpus of 16 billion web pages to identify duplicated content. The product supports multiple file formats (Word, Spreadsheet, PDF, RTF, plain text), operates in both online and offline modes, and detects similarity across 250+ languages while the user interface is localized into 7 languages. Document processing occurs locally on the user's device, which the company positions as a privacy advantage versus cloud-based competitors.

The product line includes core plagiarism detection, side-by-side document comparison, bulk comparison for grading entire classes, a readability checker (Flesch, Gunning Fog indexes), a citation/bibliography generator, and an AI content detector launched in 2024. The company serves four primary segments: students, teachers/professors, writers/journalists, and SEO experts/digital marketers, with named educational customers including IEEE, Ohio University, University of Massachusetts Boston, King Saud University, Trinity College, Remington College, and others. Distribution is product-led via a free Basic tier (30 searches/day, limited words), a PRO tier at $39.95 perpetual license, and a Business 5-user tier at $147.95, sold through direct e-commerce on plagiarismcheckerx.com and via third-party download platforms (CNET, Softonic, Download.it).

The company operates with 1-10 employees, is bootstrapped with no disclosed external funding, and processes payments through 2Checkout. It claims presence in 80-120 countries. Strategic activity is concentrated on incremental product development (AI detection, 2026 major version) and international localization rather than enterprise sales or M&A.

Name

Plagiarism Checker X, LLC

Legal name

Plagiarism Checker X, LLC

Website

https://plagiarismcheckerx.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

Plagiarism Checker X, LLC is a privately held, bootstrapped software company that develops a Windows desktop application for plagiarism detection and AI content identification, serving students, educators, writers, and SEO professionals in 80+ countries via a one-time perpetual license model.

Ownership category

akta.pro rank

Product category

Plagiarism Detection Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Plagiarism Detection & Similarity Checking (EDAFALAA)

Keywords

• Plagiarism detection software
• Content similarity checking
• AI content detection
• Readability analysis tools
• Academic integrity software

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Software License Sales: Perpetual one-time license sales for PRO and Business versions. PRO at $39.95 for single user license with lifetime license, 24/7 support, and 1-year maintenance plan. Business at $147.95 for 5-user license with extended support. No recurring subscription fees required.
2. Free Version (Freemium): Free version with limited features (30 searches per day, limited words) to drive adoption and upgrade conversions to paid tiers.
3. Non-Profit Discounts: 20% flat discount offered to all non-profit organizations with proof of non-profit status.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Plagiarism Checker X develops and sells a Windows desktop plagiarism-detection application that compares user-submitted documents (Word, Spreadsheet, PDF, RTF, plain text) against billions of web pages and across documents, using deep-search and AI-content-detection technology. The product is offered as a free Basic version and paid one-time PRO ($39.95) and 5-user Business ($147.95) perpetual licenses, with local processing for privacy and optional offline cross-comparison.

Product overview

Plagiarism Checker X is a single desktop application for plagiarism detection and content analysis. The core product Plagiarism Checker X offers online plagiarism checking, side-by-side document comparison, bulk comparison, readability checking, and AI content detection as integrated features. The product is available in free Basic tier (limited daily searches and word count) and paid PRO tier ($39.95 for lifetime license with unlimited usage). Citations and bibliography detection are included as academic-focused features. The software supports multiple file formats including Word, PDF, RTF, and plain text, and operates in both online and offline modes.

Differentiator

Problem solved

Functional benefit

Products and services

• Plagiarism Checker X Windows desktop application that detects plagiarism and content similarity in research papers, blogs, assignments and websites by comparing user documents against billions of web pages and against other documents. Bundles AI-content detection, side-by-side and bulk comparison, readability analysis and bibliography/citation exclusion; processes files locally on the user's device with optional offline mode and supports Word, Spreadsheet, PDF, RTF and plain-text formats in 250+ languages.

Quantifiable outcome

• 3x faster than available plagiarism checking solutions with equal reliability (per independent product audit)
• +3 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature10 records

Partnerships

One partnership is on record.

• 2Checkout (Verifone Payments BV / Avangate Inc.)coreTechnology or Integration2Checkout handles all payment processing, order management, digital delivery, and customer subscription management. Processes payments in 40+ currencies with support for credit cards, PayPal, bank transfers, direct debit, and regional payment methods. PCI DSS compliant payment infrastructure.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Turnitin (Turnitin LLC): Market-leading academic plagiarism and integrity platform used by most universities globally. Directly comparable in plagiarism-detection functionality to Plagiarism Checker X, but Turnitin is an enterprise SaaS incumbent with LMS integrations that PCX lacks.
• Grammarly: Popular AI writing assistant whose plagiarism checker competes with PCX for students and professionals. Comparable in serving writers, students and educators, but bundles a much broader grammar/style product rather than a standalone desktop tool.

Direct peers

• Copyscape: Long-standing web-based plagiarism detection service for publishers and SEO professionals; one of PCX's most direct competitors for the writers/journalists and digital marketers segment. Same similarity-search model, different delivery (web vs desktop).
• Copyleaks: AI-content and plagiarism detector used by ed-tech and enterprise buyers. Overlaps with PCX on AI-content detection and academic integrity use cases, with a heavier enterprise SaaS and integration focus.
• Quetext: Web-based plagiarism checker targeting students, educators and writers with a similar freemium tiering. Direct overlap on primary segments, with cloud delivery instead of desktop.
• SmallSEOTools Plagiarism Checker: Free plagiarism checker heavily used by SEO professionals and students; competes with PCX's free tier on the same writers/SEO persona. Closely matched product positioning and audience.
• Unicheck (originally Plagiat.pl): Cloud-based plagiarism detection service positioned for educational institutions and LMS integration. Overlaps with PCX on educators and academic integrity, with a SaaS go-to-market.

Emerging players

• Originality.ai: AI-content and plagiarism detector focused on web publishers and SEO agencies. Emerging overlap with PCX on AI-content detection for the digital-marketing segment.
• Scribbr: Academic editing and proofreading brand that has expanded into plagiarism checking and AI-detection for students. Adjacent competitor for the student persona PCX targets most.

Regional players

• Compilatio: European (French-headquartered) plagiarism-detection platform widely adopted in European universities. Comparable product for educators, with strongest penetration in France and EU institutions, overlapping with PCX's localized French/German/Italian/Spanish footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/plagiarismx
• Facebookfacebook.com/plagiarismcheckerx.llc
• LinkedInlinkedin.com/company/plagiarismcheckerx

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Plagiarism Checker X, LLC