Elasticsearch is a distributed, RESTful search and analytics engine that lets you perform and combine many types of searches — structured, unstructured, geo, metric — any way you want. Elasticsearch provides easy to implement powerful, modern search experiences for websites, apps, or ecommerce stores.

Kibana is an free and open frontend application that sits on top of the Elastic Stack, providing search and data visualization capabilities for data indexed in Elasticsearch. Commonly known as the charting tool for the Elastic Stack (previously referred to as the ELK Stack after Elasticsearch, Logstash, and Kibana), Kibana also acts as the user interface for monitoring, managing, and securing an Elastic Stack cluster — as well as the centralized hub for built-in solutions developed on the Elastic Stack.

Splunk is the leading software platform for machine data that enables customers to gain real-time Operational Intelligence. Enterprises, universities, government agencies and service providers use Splunk software to harness the power of their machine data for application management, IT operations, security, web intelligence, customer and business analytics and more.