Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · AI Plagiarism Checkers

PlagiarismCheck.org vs Noplag

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score PlagiarismCheck.org #6 in AI Plagiarism Checkers 8.7/10 Free plan Free plan✓ 1 of 3 features Visit site
Noplag #8 in AI Plagiarism Checkers 8.4/10 Free plan · 14-day trial Free planFree trial✓ 1 of 3 features Visit Noplag

PlagiarismCheck.org leads on 0 checks, Noplag on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePlagiarismCheck.org · 8.7/10
  • Free planboth
  • Free trialonly Noplag

PlagiarismCheck.org scores higher on our rubric for ai plagiarism checkers: 8.7 against 8.4 out of 10; our editors rank them #6 and #8.

PlagiarismCheck.org is the better fit for schools wanting free access and broad LMS coverage. Noplag is the better fit for technical users wanting open-source self-hosting.

  • PlagiarismCheck.org fits best

    Schools wanting free access and broad LMS coverage

  • Noplag fits best

    Technical users wanting open-source self-hosting

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature PlagiarismCheck.org 8.7/10 Visit ↗ Noplag 8.4/10 Visit ↗
At a glance
Editor score 8.7 8.4
Ranking #6 in AI Plagiarism Checkers #8 in AI Plagiarism Checkers
Best for Schools wanting free access and broad LMS coverage Technical users wanting open-source self-hosting
Pricing model Free plan + paid Free plan + paid
Starting price — $9.99/mo
Free plan ✓ ✓
Free trial — 14 days
Deployment Cloud, Browser extension Cloud, Desktop
Platforms Web, Chrome extension Web, Windows, macOS, Linux
Integrations 9 integrations 4 integrations
Features PlagiarismCheck.org 1/3 · Noplag 1/3
LMS integrations Not checked yet Not checked yet
API access ✓ ✓
AI writing check Not checked yet Not checked yet
Specs
Source coverage Not checked yet Not checked yet
Maximum document words Not checked yet Not checked yet
Supported file formats Not checked yet Not checked yet
Report export Not checked yet Not checked yet
Our review
Pros
  • Checks web, scholarly, institutional, and other databases
  • Detects rearrangements, synonym substitutions, and hidden characters
  • Supports seven LMS integrations, PDF reports, API access, and authorship verification
  • Checks live web, academic papers, Common Crawl, Wikipedia, and proprietary databases
  • Open-source Apache 2.0 engine supports self-hosting
  • REST API, webhooks, LTI 1.3, and major LMS integrations
Cons
  • Individual pricing uses multiple packages with different plan structures
  • Advanced and Pro are oriented toward institutional accounts
  • Its broad feature set may exceed the needs of basic checking workflows
  • No AI-generated-text detection
  • Free and paid checks cap documents at 2,500 to 50,000 words
  • Advanced features require paid plans or Enterprise deployment
Our verdict

PlagiarismCheck.org is a browser-based plagiarism and AI detection service for students, educators, institutions, writers, and content creators. It compares submitted text with publicly available web resources, scholarly content,…

Read the review →

Noplag is a plagiarism checker for students, educators, researchers, publishers, and businesses. It accepts pasted text, document uploads, and URLs, then compares content with live web pages, academic papers, Common Crawl, Wikipedia, and…

Read the review →
  1. PlagiarismCheck.orgAI Plagiarism Checkers 8.7Free plan
  2. NoplagAI Plagiarism Checkers 8.4Free plan · 14-day trial

Strengths and trade-offs

  • PlagiarismCheck.org — where it wins

    • Checks web, scholarly, institutional, and other databases
    • Detects rearrangements, synonym substitutions, and hidden characters
    • Supports seven LMS integrations, PDF reports, API access, and authorship verification

    Where it doesn't

    • Individual pricing uses multiple packages with different plan structures
    • Advanced and Pro are oriented toward institutional accounts
    • Its broad feature set may exceed the needs of basic checking workflows

  • Noplag — where it wins

    • Checks live web, academic papers, Common Crawl, Wikipedia, and proprietary databases
    • Open-source Apache 2.0 engine supports self-hosting
    • REST API, webhooks, LTI 1.3, and major LMS integrations

    Where it doesn't

    • No AI-generated-text detection
    • Free and paid checks cap documents at 2,500 to 50,000 words
    • Advanced features require paid plans or Enterprise deployment
  • PlagiarismCheck.org8.7/10 · Free plan

    A broad checker for academic sources, AI signals, authorship, reports, and LMS workflows.

    Visit siteFull verdict →
  • Noplag8.4/10 · Free plan · 14-day trial

    A self-hostable plagiarism checker with broad source coverage but no AI detection.

    Visit NoplagFull verdict →

More comparisons

All AI plagiarism checkers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update