SEOTall SEO Tall

Plagiarism is an essential Internet problem hurting both your feelings and your site rankings. While both Google and webmasters are figuring out how to combat it, let’s have a look at web-based plagiarism checkers to help you find the thieves:

Data source
Registration
Reliability
Usability

Copyscape.com
Google’s Web APIs
No (for free version)
90%
high

Doc Cop
Google, Yahoo, Live
required
80%
moderate

Plagiarism Detect
Google
required
50%
low

Reprint Writers’ tool
Yahoo
no
60%
moderate

Copyright Spot
Yahoo?
no
45%
moderate

(Note: Reliability and Usability columns reflect my personal opinion; please share yours!)

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