Insight engine is based on the data available in companies. It includes a broader spectrum of technologies that increase the quality of the search. All the searches should be in the simple language which results in relevant search. Data should be connected with connectors. It should also add some extra information to the search which is not asked. It should also contain videos, images, voice messages of the search.

Cloud document search is one of the largest document searches which store private documents and it is still increasing. It is most important for them who have tool for cloud document search. It is a source which shares all the knowledge using tool to the single technology of document. It captures all the information’s related to a single topic. Many users search via cloud document search.

Information retrieval is based on full text or other contents. It is a science of search for information in a document and also searches for metadata which describes the data. It obtains information system resources which are relevant to the information search. It was popularised with the article As We May Thing written by Vannevar Bush in 1945.