Enterprise Search is a decade long concept which is popular enough itself based on enterprise need of content search. And products like FAST, Autonomy, Solr are the stallwarts in this space. However of late, with new need of light-weight search in enterprise to achieve fast and easy search experience, a set of new products have arrived which are equally or sometimes more capable of delivering desired search experience to users. This set includes search product like Elastic, Covio, Sinequa etc.