which cms is digg stumble upon and olx used?

hi i want to know that digg stumbleupon olx are using their own custom made cms or they use other available cms like drupal wordpress etc?

 

Have you looked at the code on those sites?

 

Difficult to know that. Maybe they are using some custom designed cms.

 

Thanks Amit

 

Yes, they are defiantly using custom design for their sites but no one can judge that only by seeing codes or design that which cms they are using .