We had similar conclusions: the free version of Go, "$ 499 for annual support of the free version" and "$ 499 for 3 remote agents" were worth it, but the price jump after that (for the "enterprise" version with release management support) was astronomical.
There is an โElectric Cloud" for commercial alternatives, but it's even more expensive than ThoughtWorks.
For Open Source, there is Cruise Control (Go is the rewritten personal version of Open Source Cruise Control), Continuum, LuntBuild, Anthill, etc. These are mostly continuous integration systems (that is, more focus on startup than managing results), but they seem to work well (I used Cruise Control and Hudson in the past with great success.)
Dana lacoste
source share