Just an FYI, WHMCS has a habit of deleting post on there forums (form personal experience and a nice post on another hosting related forum regarding this transpiring).

Along with this they require "register_globals" on which is considered by many to be a potential security flaw.

There have also been some other issues.

I would recommend doing full research before choosing them.

We consider them until I made a post stating that an import of customers could be done via the Plesk API and it was deleted because they seemed to not want to admit it since they had already denied it's possible.

I use ClientExec.

I am using WHMCS, I strongly recommend it.

Or clientexec, it is good as whmcs.

I use WHMCS and it is amazing. So many features, easy to integrate, and the support is nice.

We use Modernbill v5. While they arent the easiest company to work with and obtain updates or information from, we still feel that their product is the best on the market.

WHMCS has been getting much better recently, and their tech support has been very quick to solve several of my issues..

It's not without it's quirks, but it is MUCH better than it was a year ago.

-Jason

I would use ModernBill.

Currently we're still using WHM Autopilot and it seems to be pretty stable but I am also in the process of reviewing information on ModernBill.

I've already taken a look at all of the others mentioned here and unless I find something I really don't like I would say we will be converted to ModernBill by the end of the month.

Good luck on your choice.

WHMCS
It supports over 20 of the most popular processors including E-gold!!!

I know that modernbiill is quite a good option but we have developped our own one, it was very time consuming but we get totally customized and effective billing system

Hi,

WHMCS all the way tbh!

tried MB 5 and found it slow and cumbersome - whereas WHMCS is fast sleek and agile!

Cheers

Paul