Confluence/JIRA if you're self hosting will set you back $10 for 10 users. At that price point, some people are willing to fork out for that and set it up as a

Confluence/JIRA if you're self hosting will set you back $10 for 10 users. At that price point, some people are willing to fork out for that and set it up as a long running demo/test-case for a particular product without needing to get management/finance departments involved (which is often a stumbling block). It's not 'freemium' but it's close enough. That's usually enough of a wedge in the door to get management interested in a wider deployment.