<p>What are the alternative's to using the <a href="http://www.ithenticate.com" rel="nofollow noreferrer">iThenticate</a> service for content comparison?</p>

[{'answer_id': 51724, 'author': 'skolima', 'author_id': 3205, 'author_profile': 'https://Stackoverflow.com/users/3205', 'pm_score': 2, 'selected': False, 'text': '<p>Wikipedia page on <a href="http://en.wikipedia.org/wiki/Plagiarism_detection" rel="nofollow noreferrer">plagiarism detection</a> has a list of commercial and free services.</p>\n'}, {'answer_id': 5225095, 'author': 'Bob Creutz', 'author_id': 648826, 'author_profile': 'https://Stackoverflow.com/users/648826', 'pm_score': 1, 'selected': False, 'text': '<p>I generally recommend <a href="http://www.copyscape.com" rel="nofollow">Copyscape</a> and/or <a href="http://etest.vbi.vt.edu/etblast3/" rel="nofollow">eTBlast</a> if you choose not to use iThenticate.  </p>\n'}]
['https://Stackoverflow.com/questions/51179', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/-1/']