Datadog is described as 'Monitor IT and DevOps environments with over 120 integrations, providing a unified view of your infrastructure with graphing, correlation, and analytics' and is a popular Network Monitor in the network & admin category. There are more than 100 alternatives to Datadog for a variety of platforms, including Web-based, Linux, Windows, Mac and SaaS apps. The best Datadog alternative is Grafana, which is both free and Open Source. Other great apps like Datadog are Zabbix, TrafficMonitor, Netdata and Better Stack.
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.
Munin is a networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work.
Stackify offers the only developers-friendly cloud based solution that fully integrates application performance management (APM) with error tracking and log management.
VictoriaMetrics can be used as long-term storage for Prometheus or for vmagent.
Nagios Log Server is a powerful enterprise-class log monitoring and management application that allows organizations to quickly and easily view, sort, and configure logs from any source on any given network.
Server monitoring software for physical, virtual, and cloud-based IT. They also do email monitoring, application monitoring. The system is used to provide insight into server up-time and reduce outages.
Netweak is a delightful, minimalist monitoring platform that gives you insights on performance and availability for your linux servers & websites.
Agentless IT monitoring built to scale - NetCrunch offers a powerful, policy-driven platform for real-time visibility across your entire infrastructure system.
LogCentral is a cloud-based SaaS log storage & management solution that provides a very quick onboarding, legal compliance storage (GPDR) at a fraction of the cost of other solutions.
Wavefront is an enterprise-class metrics monitoring and real-time analytics service that lets you visualize, query and alert over data from across your stack (infrastructure, containers, network, custom application metrics, business KPIs, etc.).
Full-stack intelligent monitoring of infrastructure, system and apps running in Amazon Web Services and Rackspace cloud environments
Monitor applications, infrastructure, and servers in one platform. Out-of-the-box dashboards. Metrics. Analytics. Starting at $7.50/month. Free 14-day trial.
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Far more intuitive interface and provides a lot more features