Logstash is an open source, server-side data processing pipeline that ingests data from a multitude of sources simultaneously, transforms it.
License: Open Source
Logstash is primarily a data processing pipeline that excels in flexibility and integration with various data sources, while Nagios Log Server focuses on centralized log management with a user-friendly interface and built-in monitoring capabilities. The choice between them depends on whether you prioritize data transformation and processing or centralized logging and monitoring.