I have a small hosting company in El Salvador, and most of my clients pay via bank deposit, but I want to have a complete control of them using one of this softwares: WHMCS or ClientEXEC. I´m getting a new VPS from KnowHost in this week and I want to include this client software, wich one do you recomenme for a VPS with cPanel?
If you are looking for a basic billing system, ClientExec is the way to go. If you are looking for a robust billing system with additional features then WHMCS is the way to go. I have tried both systems and they're fantastic, just comes down to your preference.
As of now you can start with ClientExec and later you may upgrade to WHMCS. WHMCS is a complete client management, billing and support system. WHMCS is specially designed for web hosting business. You will find all the big hosting providers using this billing software.