Countly - Product Analytics and Innovation. Build better customer journeys.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
ThingSpeak - Open source data platform for the Internet of Things. ThingSpeak Features
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
AWS IoT Analytics - IoT Management
Prometheus - An open-source systems monitoring and alerting toolkit.