Overall we liked Zabbix, which was easy to install, has an intuitive user interface and enough granularity to perform most network monitoring tasks. Zabbix is all open source. There is no separate paid Enterprise version. This means all of the source code is open source and available, which should be attractive to both small and large enterprises. Although Zabbix does not offer a separate commercial version, commercial support contracts are available in five different levels ranging from ‘Bronze’ to ‘Enterprise’. Zabbix also offers other paid services such as integration, turnkey solutions and general consulting.