Canonical, MySQL (now Oracle), Zimbra (now VMware), Zend, Gluster (also acquired, I forgot by who) and a whole bunch of others are or were at some point open source companies.<p>Pure open source software companies are relatively few in number but companies that contribute to open source and profit from that open source in that they have a lot more people working on the code and taking care of bug spotting and bug fixing is considerable.<p>One nice example of that is Basecamp.<p>Open source companies that are successful are acquired at a relatively high rate so they don&#x27;t usually last as such independently.