I would like to know how this or other tools search for duplicate content. How can i be sure that this tool is working and not skipping. Do they use google search or what? How come they can search article so fast and say if it is duplicate or no?
Just checking online, came across this: https://www.plagiarismtoday.com/stopping-internet-plagiarism/1-how-to-find-plagiarism/ Apparently copyscape uses Google as it's back end. This site also shows you how to check using Google directly. Hope this helps!!
Yea i have read this and it says to search Google for sentences of article. But if this tools search Google, how come they get almost instant results. Isnt there a better way to search for duplicate content? Is there maybe some kind of API which i can use to search. I m looking to create my self a bot that will do a search for me. Problem is that if i search too much Google will kick in captcha code. But then again maybe copyscape uses captcha decoding...
I can't speak for Plagium (never used it), but Copyscape does not use a live search. They use separate indices that are not necessarily the same as doing a Google/Yahoo search: I discovered this when I signed up for a paid subscription and they missed copies in the articles I checked. That's direct copies of old articles, not partial copies of new content. Since I rely on finding copies to run a business, I use two free services that are far more reliable (though slower). Copyscape was simply not good enough for my needs.
But they need to search somewhere. So i m interested how do they search for duplicated content and where are they searching. We already hear searching on google by placing a text inside quotes.