Logstash is an open source, server-side data processing pipeline that ingests data from a multitude of sources simultaneously, transforms it, and then sends it to your favorite "stash.".



Heka is described as 'Open source stream processing software system developed by Mozilla. Heka “Swiss Army Knife” type tool for data processing, useful for a wide variety of different tasks, such as:' and is an app. There are three alternatives to Heka for a variety of platforms, including Linux, Mac, Windows, Java Mobile and BSD apps. The best Heka alternative is Logstash, which is both free and Open Source. Other great apps like Heka are Fluentd and log.io.
Logstash is an open source, server-side data processing pipeline that ingests data from a multitude of sources simultaneously, transforms it, and then sends it to your favorite "stash.".



Fluentd is a fully free and open-source log management tool that simplifies your data collection and storage pipeline. It eliminates the need to maintain a set of ad-hoc scripts.
Harvesters watch log files for changes, send new log messages to the server, which broadcasts to web clients. Log messages are tagged with stream, node, and log level information based on user configuration.
