WHMCS it has tons of features which are easy to use and integrate. Easy and customizable. I am,I will suggest WHMCS
Clientexe also looks good, but i feels whmcs easier to integrate and configure .
hulkman Reviewed by hulkman on . WHMCS or Clientexec ClientExec: Simpler and growing WHMCS: More Features What would you chose betwen WHMCS and Clientexec? I think that CE have better design than WHMCS and it's easier to find what you need, then they are an billing system that are growing all the time! So, what would you chose and why? Don't just write " WHMCS because I love it! " Write why! :)) Rating: 5