Elasticsearch

Engine designed to provide distributed, multitenant RESTful search, processing both static and time series data.
At first Elasticsearch was created as independent solution, but nowadays additional tools, especially such as Kibana for analytics & visualisation and Logstash (server-side pipeline) are usually implemented in the project, creating new opportunities.

The most observable benefits of using Elasticsearch are: the capacity of horizontal scaling and super speed in comparison to regular databases.