The best open source alternative to Datadog is Grafana. If that doesn't suit you, our users have ranked more than 100 alternatives to Datadog and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Datadog are Zabbix, TrafficMonitor, Prometheus and Nagios.
Grafana provides a powerful and elegant way to create, explore, and share dashboards and data with your team and the world.
Gather and analyze accurate statistics and performance metrics, visualize it, get notified about current and potential issues without delay, and take advantage of our time-tested professional development and support.
TrafficMonitor is a network monitoring suspension window software in Windows. It can display the current network speed, CPU and memory usage. It also support the functions of display in the taskbar, change skin and historical traffic statistics.
Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community.
Nagios is a powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues.
Easily visualize data pushed into Elasticsearch from Logstash, es-hadoop or 3rd party technologies like Apache Flume, Fluentd, and many others.
Beszel is a lightweight server monitoring platform that includes Docker statistics, historical data, and alert functions.
Wazuh is a free and open source platform used for threat prevention, detection, and response. It is capable of protecting workloads across on-premises, virtualized, containerized, and cloud-based environments.
An open source observability platform: Unify session replays, logs, traces, and errors – all without the Datadog price tag.
Grafana Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.
Monitorix is a system monitoring tool designed to monitor as many services and system resources as possible. Due to its simplicity and small size it can also be used on embedded devices.
Logstash is an open source, server-side data processing pipeline that ingests data from a multitude of sources simultaneously, transforms it, and then sends it to your favorite "stash.".
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Zabbix does not work off of the StatsD / Graphite basis, requires an agent on each monitored instance (instead of sending simple updates via UDP, or HTTP), Zabbix cannot adapt to dynamic infrastructure environments.