Hey Balaji, What is your use case here? What will be the number of requests you will receive? I have been using Elasticsearch for some time now and don't know much about Atlas. Built on top of Lucene, Elasticsearch is designed for searching, however it can get complex to maintain in production, particularly as data grows. ES offers tons of options for full text searches, for example, ES analyzer makes it easier to write very specific queries that can pull back filtered results immediately. ES is free and open source, so if you run into any difficulties, you will have no problem finding solutions unless you are doing something very niche.