From "license comparison" in splunk.com search
Splunk licenses Splunk offers two
basic kinds of licenses: Free, and
Enterprise.
Splunk Free is a totally free (as in
beer) version of Splunk. It allows you
to index up to 500MB/day and will
never expire. Splunk Free is designed
for personal, ad-hoc search and
visualization of IT data. It entitles
you to 500MB/day of licensing volume.
It does not support the features
listed below for Splunk Enterprise.
Splunk Enterprise supports multiple
user accounts and role-based access
controls, distributed search,
forwarding in TCP/HTTP formats (you
can forward data to other Splunk
instances, but not to non-Splunk
instances), deployment management,
scheduled saved searches (including
summary indexing) and
alerting/monitoring. About Splunk
licenses - from Documentation More
about Splunk Free - from Documentation
How Splunk licensing works
More About Splunk Free
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