EL Elasticsearch Search Engines Distributed search and analytics engine Replaces Algolia, Splunk ★ 77.8k Hard setup Elastic-2.0
KI Kibana Monitoring & Status Visualization and exploration for Elasticsearch data Replaces Splunk, Datadog ★ 21.2k Medium setup AGPL-3.0
LO Logstash Monitoring & Status Server-side data processing pipeline for logs Replaces Fluentd ★ 14.9k Medium setup Apache-2.0