Here's the raw facts on the three different umbraco editions. For a better understanding between the standard and the premium level support, you might want to look at some sample questions too.

  Open source edition Pro with Standard support  Pro with Premium support
Full source code available 
Has open source restrictions    
Support from the core team  
Microsoft Certified Edition*  
Ticket system with full log   
Upgrade notification service   X
Guaranteed response time   48 hours  24 hours 
Support period    3 months  12 months 
Architectual advising      X
Upgrade assistence     
       
Price (with commercial license included) 1st year  N/A €1.500**  €3.000** 
Optional fee for subsequent years   N/A €1.000**  €2.500** 

 

Order now

* Microsoft Certified Edition available by the end of 2007
** 25% sales tax will be added for Danish companies