What are some alternatives?
netdata - Real-time performance monitoring, done right
Apache Thrift - An interface definition language and communication protocol for creating cross-language services.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Eureka - Eureka is a contact center and enterprise performance through speech analytics that immediately reveals insights from automated analysis of communications including calls, chat, email, texts, social media, surveys and more.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Docker Hub - Docker Hub is a cloud-based registry service