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Head-to-head · Plagiarism Checkers

Copyscape vs StrikePlagiarism

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Copyscape #4 in Plagiarism Checkers 8.9/10 Free plan Free plan✓ 2 of 4 features Visit Copyscape
StrikePlagiarism #6 in Plagiarism Checkers 8.7/10 Paid ✓ 4 of 4 features Try StrikePlagiarism

Copyscape leads on 1 check, StrikePlagiarism on 0, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCopyscape · 8.9/10
  • Free planonly Copyscape
  • Most featuresStrikePlagiarism · 4 of 4

Copyscape scores higher on our rubric for plagiarism checkers: 8.9 against 8.7 out of 10; our editors rank them #4 and #6.

Copyscape offers free plan; StrikePlagiarism doesn't.

Copyscape is the better fit for web publishers and teams checking site content. StrikePlagiarism is the better fit for academic institutions needing broad, deep checking.

  • Copyscape fits best

    Web publishers and teams checking site content

  • StrikePlagiarism fits best

    Academic institutions needing broad, deep checking

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 Copyscape 8.9/10 Visit ↗ StrikePlagiarism 8.7/10 Visit ↗
At a glance
Editor score 8.9 8.7
Ranking #4 in Plagiarism Checkers #6 in Plagiarism Checkers
Best for Web publishers and teams checking site content Academic institutions needing broad, deep checking
Pricing model Free plan + paid Paid
Starting price — €2.33/unit usage-based
Free plan ✓ (best) —
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Integrations 1 integrations 7 integrations
Features Copyscape 2/4 · StrikePlagiarism 4/4
Web source matching ✓ ✓
Academic source matching Not checked yet ✓ (best)
API access ✓ ✓
LMS integration Not checked yet ✓ (best)
Specs
Supported languages Not checked yet Not checked yet
Word limit Not checked yet Not checked yet
Report export formats JSON, XML, HTML HTML, PDF
Our review
Pros
  • Batch Search checks up to 10,000 website pages
  • Private indexes support internal duplication checks
  • API, WordPress, case tracking, and team management included
  • Checks web, scholarly, academic, publisher, university, and partner sources
  • Adds paraphrase, translated-text, manipulation, and AI-content detection
  • Supports LMS integrations, assignment workflows, feedback, and REST API access
Cons
  • Premium searches use pay-per-search pricing
  • Academic-source matching is not part of its stated focus
  • The free checker focuses on finding copies of web pages
  • Paid individual access is priced per token rather than per month
  • Additional checking services may increase the final price
  • Free-plan terms vary by region
Our verdict

Copyscape is an online plagiarism detection service for content managers, website owners, publishers, educators, and organizations. It checks pasted text, uploaded PDF and Word files, and website pages for matching content. The product is…

Read the review →

StrikePlagiarism is a web-based academic integrity system for universities, schools, publishers, researchers, and individual authors. Its core function is similarity checking across open internet sources, scientific journals, academic…

Read the review →
  1. CopyscapePlagiarism Checkers 8.9Free plan
  2. StrikePlagiarismPlagiarism Checkers 8.7Paid

Strengths and trade-offs

  • Copyscape — where it wins

    • Batch Search checks up to 10,000 website pages
    • Private indexes support internal duplication checks
    • API, WordPress, case tracking, and team management included

    Where it doesn't

    • Premium searches use pay-per-search pricing
    • Academic-source matching is not part of its stated focus
    • The free checker focuses on finding copies of web pages

  • StrikePlagiarism — where it wins

    • Checks web, scholarly, academic, publisher, university, and partner sources
    • Adds paraphrase, translated-text, manipulation, and AI-content detection
    • Supports LMS integrations, assignment workflows, feedback, and REST API access

    Where it doesn't

    • Paid individual access is priced per token rather than per month
    • Additional checking services may increase the final price
    • Free-plan terms vary by region

More comparisons

All plagiarism checkers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update