VMware vSphere is a concentrates on the architecture, hardware, and software in the standard and enterprise plus editions of vSphere 6, which offers better scale, resilience, and fault tolerance than ever before.
Zabbix offers great performance for data gathering and can be scaled to very large environments. Distributed monitoring options are available with the use of Zabbix proxies. Zabbix comes with a web-based interface, secure user authentication and a flexible user permission schema.