Nice post on the SaaS offerings! That, however, is not an option for enterprises where source code is that critical, it should "never leave the perimeter".

Those firms need a behind-the-firewall kind of security, under a common software platform, preferably open source (like rhodecode.com).

In other words, it is a must to have source code management that is developer-focused (with code reviews, pull requests and automation), yet provides unified security across the code base, with access controls and common authentication.