Sure, Splunk is awesome.

But what about these open source self-hostable alternatives?

You may want to check by yourself: ELK stack.

1. Install

   ELK stack

   A log management stack with Elasticsearch, Logstash, Kibana

   ★ 71.0k Log management Monitoring Search engine Observability License: Elastic License

   Elasticsearch is a distributed search and analytics engine, scalable data store and vector database optimized for speed and relevance on production-scale workloads. Elasticsearch is the foundation of Elastic’s open Stack platform. Search in near real-time over massive datasets, perform vector searches, integrate with generative AI applications, and much more.