WHMCS: The most popular hosting management and accounting system, starting at $15.95 per month for 250 clients

WHMCS is now the most popular host management and financial system in the world. The VPS that people usually buy are all managed and paid by WHMCS, based on PHP and Mysql. The authorization price also varies, depending on the number of customers. This is explained below.

30-day money-back guarantee; switch plans at any time

Starter : Number of customers: 250, $15.95/month, purchase link
Plus : Number of customers: 250, $18.95/month, purchase link
Professional : Number of customers: 1,000, $24.95/month, purchase link
Business : Number of customers: unlimited, $35.95/month, purchase link

For details, please refer to the official website: https://www.whmcs.com/pricing/

WHMCS tutorial provided by the official website: https://docs.whmcs.com/Documentation_Home