Datadog is a SaaS observability platform combining infrastructure monitoring, application performance monitoring, log management, and security in one product, billed per host for infrastructure and APM and per GB for logs. Teams look for a Datadog alternative when that usage-based cost grows faster than their environment, often starting with the infrastructure layer: servers, storage, and SAN.
XorMon does not replace Datadog. Datadog provides application performance monitoring, distributed tracing, real user monitoring, and cloud security, none of which XorMon does. Where the two overlap is infrastructure monitoring: servers, storage, and SAN. If that layer is driving up a Datadog bill, it can move to XorMon, either alongside Datadog or in place of it for that layer alone, while Datadog keeps handling APM.
Last updated: September 17, 2026. We review this comparison at least once a year, and whenever Datadog or XorMon changes its pricing or core positioning.
| Tool | Best for | Deployment | Pricing model |
|---|---|---|---|
| XorMon | Server, storage, and SAN monitoring without per-host or per-GB billing | On-prem (Linux, VMware OVA, Hyper-V, Docker) | Free, self-hosted GPL v3 edition. Optional paid commercial support. No per-host fee, no per-GB log charge, and no monitoring data leaves your network |
| Zabbix | General-purpose IT and OT observability: network, servers, cloud, containers, IoT, and applications | On-premises, Zabbix Cloud (SaaS), or public cloud (AWS, Azure, GCP, OpenShift) | Free, open source. AGPL v3 from version 7.0, GPL v2 for earlier versions. No license fees; optional paid technical support |
| Checkmk | Infrastructure, application, and synthetic monitoring, scaling from small sites to large distributed environments | On-premises (self-hosted, virtual or physical appliance) or Checkmk Cloud (SaaS) | Community edition: free and open source, scalable up to approximately 100 hosts. Pro: from EUR190/month billed annually. Ultimate: from EUR275/month billed annually, scaling to 100,000+ hosts |
| Prometheus + Grafana | Metrics collection and alerting (Prometheus) paired with dashboards and visualization (Grafana), commonly deployed together for cloud-native and self-hosted monitoring | Self-hosted (Prometheus server plus Grafana, both open source); Grafana Cloud available as an optional managed SaaS | Free and open source when self-hosted (Prometheus: Apache 2.0; Grafana: AGPL-3.0-only). Grafana Cloud has an always-free tier with limited retention; paid Grafana Cloud plans from $19/month plus usage |
Datadog is a SaaS observability platform for infrastructure monitoring, application performance monitoring, log management, real user monitoring, and cloud security, accessed through a web-based UI. The Datadog Agent is installed on each host and sends metrics and events to Datadog.
Datadog bills by host and by data volume: Infrastructure Monitoring from $15 to $27 per host per month, APM from $31 to $47 per host per month, and Log Management at $0.10 per ingested GB plus $1.70 to $2.55 per million log events indexed (rates published on datadoghq.com/pricing, checked September 17, 2026). Teams look for a Datadog alternative when this usage-based cost grows faster than their environment, often starting with infrastructure monitoring, which does not need APM-level instrumentation.
The table above compares infrastructure monitoring alternatives to Datadog by best fit, deployment, and pricing model, including XorMon.
XorMon moves server, storage, and SAN monitoring onto a self-hosted, open-source platform: a free GPL v3 edition with no per-host fee and no log-ingestion charge, plus optional paid commercial support. Monitoring data stays inside your network instead of being ingested into a third-party SaaS platform, so there is no data-volume bill that grows as your environment does.
No. Datadog's application performance monitoring, distributed tracing, real user monitoring, and cloud security have no equivalent in XorMon. XorMon covers infrastructure monitoring: servers, storage, and SAN. Teams typically keep Datadog, or another APM tool, for the application layer, and move infrastructure monitoring to XorMon where cost is the deciding factor.
Yes. XorMon can run alongside Datadog, handling server, storage, and SAN monitoring on-premises while Datadog continues to cover APM, tracing, and the application layer. This reduces the number of hosts reporting to Datadog's infrastructure and log pricing without giving up APM.
Yes. XorMon has a self-hosted edition released under the GPL v3 license, with optional paid commercial support. All monitoring data stays inside your network; none of it is sent to a third-party service.