Proofread Bot checks your text for style and grammar issues. You can use this tool for free for up to 2000 words a day. If you need to check larger texts, you can buy credits or earn them by teaching the bot new tricks at http://proofreadbot.com/node/add/text. Proofread Bot did not catch a grammar or style error? Submit it here http://proofreadbot.com/node/add/text ! Plagiarism checks use search engines to find duplicates and require a pro package and your Bing or Google search API key. You can enter API keys at http://proofreadbot.com/user where you can also see how to obtain such keys. If you like the plugin, please rate it and buy a package to support further development.