HostBill

FOSSBilling

Free, open-source billing and client management software for hosting businesses, forked from BoxBilling.

• Free plan or free to use
• Open source
• Runs on your own server

WHMCS

by WebPros

Billing, provisioning and support system used by many web hosts to sell hosting, domains and servers.

• Runs on your own server
• Has an API

Blesta

Self-hosted billing and client management platform for hosting providers, with provisioning modules.

• Runs on your own server
• Has an API

Upmind

Billing and client management platform for hosting providers, offered as a hosted service.

ClientExec

Billing and support software for web hosts, with automated provisioning for common control panels.

• Runs on your own server