Best Billing Script for Web Hosts?

[layeredzone]

I personally use WHMCS, anybody else can recommend something else?

Thanks

[kingofoverkill]

Were there other scripts you tried that didn't work as well? It would be nice to know the strengths and weakness of ones you have tried.

[layeredzone]

I haven't personally tried any other ones but I have heard of ModernBill and ClientExec.

Thanks

[kingofoverkill]

I'm seeing many hosts use WHMCS. It seems its popularity is increasing.