Among the many useful features of OSSEC is its capability to send alerts to any system that can consume syslog data. This makes it easy to combine OSSEC with a number of 3rd party SIEMs to store, search and visualize security events. Splunk for OSSEC is one such system that works on top of the Splunk platform.
Splunk can be expensive though, particularly if you collect a lot of log data. So I’ve been working on a solution for collecting OSSEC security alerts based on Elasticsearch that provides a cost effective alternative to Splunk.