Elasticsearch and ZincSearch both are general purpose search engines based on inverted indexes that can be used for app search as well as log search. In my stint at AWS I found that most companies used elasticsearch and anecdotally 90%+ users used it for log search. Log search was also the use case that I had in my mind when I built ZincSearch for my own needs and I found ES to be lacking. Here is a blog that I wrote on my motivation around building ZincSearch - https://prabhatsharma.in/blog/in-search-of-a-search-engine-b...