I am in the last phase of my web hosting company setup.Now I want to setup billing system.Let me know whether I can get an free billing system ? What all methods can be used for getting payment from the clients.Please help me !!!
Which control panel are you using ? Free probably not especially for a product which is in the stage of making you money. Try http://www.modernbill.com http://www.lpanel.net/ http://www.webhostingbilling.com/ http://www.whmautopilot.com/
Paypal and 2checkout are the two most commonly used payment gateway. Check what each of the billing system supports.
We are using ModernBill currently, but aiming to switch to WHMCS. It seems a better choice after few days testing
paypal is the best, since every one uses it, but then there are also other options. paypal is a cheap gateway, so you can try that
Go for PayPal as your payment gateway if you need a virtual terminal for credit card payments use PayPal Pro its only $20/month which beats most merchant accounts anyway. As for billing software use ModernBill its well supported and very customizable.
dont use free, its not worth it and most opensource stuff gets hacked on a regular basis. I highly recommend clientexec - its got a decent client billing and support and its very affordable and available monthly.