QuarkRank is an intelligent engine that crawls the web for opinions on various products/services and does automatic sentiment analysis on them feature-by-feature using its proprietary natural language processing technology. Online users currently spend precious hours to make the right choice based on product reviews. Quarkrank saves their time by extracting out required information that is easy to consume. QuarkRank provides a RESTful API to access its huge repository of summarized reviews. Send in a simple HTTP requests and it will send back basic XML/JSON responses, which means you can interact with our API from any language. Other than API, Quarkrank also provides web widgets (much like price comparison widgets), empowering retailers to embed summarized reviews directly into their website without any backend integration. The technology used in building widgets was much researched and it ensures that it has no effect on your store performance. Quarkank transformed state-of-art theoretical research into practical solution, to semantically understand user opinions, extract out the features people are talking about, and converting the qualitative user opinions into useful quantitative numbers.