I have seen many large companies moving their billing systems from WHMCS to Blesta. I think this is the time now WHMCS is being replaced by Blesta. I don't know why do they go to Blesta because WHMCS is still too good as compared to other billing software.
I think this is going to happen same like vBulletin when VB5 Connect was launched and all major forums and new comers went to Xenforo and left vBulletin. Maybe WHMCS is going to face the same situation.
What do you guys think? Which software do you personally prefer? WHMCS or Blesta?