The best open source Uptime Monitor alternative to Datadog is Zabbix. If that doesn't suit you, our users have ranked more than 100 alternatives to Datadog and ten of them are open source Uptime Monitor Services so hopefully you can find a suitable replacement. Other interesting open source Uptime Monitor Service alternatives to Datadog are Pandora FMS, Cabot, Checkmk and Monit.
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.
Enterprise-ready monitoring solution that provides unparalleled flexibility for IT to address both immediate and unforeseen operational issues, including infrastructure and IT processes.
Cabot is a free, open-source, self-hosted infrastructure monitoring platform that provides some of the best features of PagerDuty, Server Density, Pingdom and Nagios without their cost and complexity.
Checkmk is a monitoring tool of servers, applications, networks, cloud, containers, storage, databases, IoT and more. Checkmk is available as Raw Edition, which is 100% pure open source, and as Enterprise Edition with a lot of additional features.
Monit is a free open source utility for managing and monitoring, processes, programs, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.
Cortex provides horizontally scalable, highly available, multi-tenant, long term storage for Prometheus.
Monika is a command-line application to monitor every part of your web app using a simple YAML configuration file. Get alert notifications through SMTP, Discord, Slack, WhatsApp, and many more when your site is down but also when it's slow!.
PHP Server Monitor is a script that checks whether your websites and servers are up and running. It comes with a web based user interface where you can manage your services and websites, and you can manage users for each server with a mobile number and email address.
Server monitoring with metrics, logs, alerts, and mobile access. One-command install, simple UI only setup and a clear pricing.
Botnbot is an open source uptime and front-end performance monitoring. When your site is down, Botnbot can notify you by email, slack, or web push notification. All your downtimes are kept with a capture of the response data. You can also keep track of all Lighthouse scores.
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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.