Founded in 2002, the Australian software maker Atlassian is an exceptional company in many regards. But foremost, Atlassian is one of the best examples of flywheel SaaS companiesyet. Atlassian counts 1600 employees and sells five products JIRA (bug tracking software), Confluence (project management), HipChat (internal chat/collaboration), BitBucket (code repository) and JIRA Service Desk (help desk software. Yesterday, Atlassian filed their F-1, a document preceding their IPO, and revealed how efficient a software company they have built. In 2015, the company will generate $320M in revenue.