NetXMS

Overview

NetXMS is an open-source system for monitoring networks and infrastructure, aimed at teams overseeing anything from enterprise networks to industrial equipment. Its breadth is a strength for distributed environments, but Windows server users must plan around a 250-node limit unless they have a valid license.

It can run on premises or as a cloud platform, and its combination of discovery, monitoring and access controls suits teams that need one system across varied infrastructure. It is less compelling for buyers seeking a tightly scoped monitor with minimal deployment choices to manage.

Key features

Discovery and topology

Automated discovery builds layer 2 and IP topology and displays it as a connectivity map. That gives network teams a way to examine relationships between discovered devices, while traffic monitoring, synthetic checks and custom sensor support broaden monitoring beyond topology and availability.

Protocols and distributed monitoring

Support for SNMP, MQTT, EtherNet/IP, MODBUS-TCP, OPC UA and HTTP/REST spans conventional networking and industrial equipment. Proxy agents and zones help cover distributed networks, including sites with unstable connections or overlapping IP ranges. This makes NetXMS a strong candidate for service providers and organizations monitoring remote or industrial locations.

Integrations, alerts and control

NetXMS integrates with Grafana and can send notifications through email, SMS, Telegram, Microsoft Teams and Slack. Its Java API exposes actions available in the GUI, giving teams a route to custom integrations and automation. Access rights can be set for all devices, a group or an individual device, with permissions for read-only access, alarms or commands. The homepage also describes metric-level controls and authenticated, encrypted communications—useful distinctions for teams that need to separate monitoring and operational responsibilities.

Pricing

The open-source monitoring solution costs nothing and can be downloaded and used without charge. Windows server binaries are limited to 250 nodes without a valid license, so that edition is a better fit for smaller Windows deployments or teams able to use other supported environments. A free trial is available by contacting sales to request a trial period.

Paid support is sold separately or included with Enterprise Edition. Basic support is billed €3 800 per year and includes 10 cases annually, a two-business-day guaranteed response and the latest stable edition. It suits teams with limited support needs that can accept a slower response. Standard support is billed €580 per month or €6 500 per year, with unlimited cases, a one-business-day guaranteed response and stable versions released within the last 12 months. Premium support is billed €1 150 per month or €12 500 per year; it keeps unlimited cases, guarantees a four-business-hour response and covers stable versions released within the last 24 months.

NetXMS Enterprise Edition is offered on a customised basis for high-volume businesses and includes Standard support. It is the option for organizations that need an enterprise-grade solution rather than the free edition, though its custom pricing requires a direct offer. The support tiers trade higher cost for more cases, faster response guarantees and, at the upper levels, access to a longer span of stable versions.

Platforms

NetXMS supports Windows, macOS, Linux, FreeBSD, Solaris, AIX, HP-UX and the web, with Android and API also listed among its platforms. Remote monitoring supports geographically distributed environments, but the Windows server node cap is an important deployment constraint.

Who it's for

The product is intended for network and infrastructure monitoring, application and server monitoring, MSP/ISP/WISP services, ATM and payment switches, and industrial equipment. Its protocol range and proxy-based distributed monitoring particularly favor teams combining conventional IT with remote or operational technology sites. Organizations needing granular access control and custom automation may also benefit; teams seeking a small, narrowly defined monitor may find its scope broader than necessary.

Pros and cons

• Pros: Automated layer 2 and IP discovery produces topology maps, helping teams understand network relationships.
• Pros: Industrial protocols and proxy agents cover specialized equipment and difficult distributed links.
• Pros: The free edition, Java API, alert integrations and granular access controls give teams room to tailor monitoring and operations.
• Cons: Windows server binaries have a 250-node limit without a valid license, which can constrain larger Windows deployments.
• Cons: The free-trial request goes through sales, and enterprise deployment requires a customised offer.
• Cons: Support response guarantees range from two business days to four business hours, so teams needing rapid help must budget for a higher tier.

Alternatives

Consider Obkio if a time-limited evaluation is more useful than NetXMS's sales-requested trial: its 14-Day Free Trial includes premium features, up to 10 agents and no credit card requirement.

Paessler PRTG Network Monitor is worth considering for a smaller deployment that fits its freeware allowance of up to 100 sensors, described as about 10 devices.

Fing Security is a freemium alternative with a free plan for network scanning and troubleshooting.

ManageEngine OpManager may suit teams whose needs fit a perpetual free edition capped at three devices.

Choose Centreon if an Apache-licensed core platform is a priority; some files use GPLv2.

Checkmk is an alternative for teams seeking a free community edition with 2,000+ pre-built integrations and capacity for up to about 100 hosts.

Ganglia is another free, self-hosted open-source monitoring option.

ntopng offers a community open-source edition designed for home users and network practitioners, with a suggested maximum of 256 live local hosts.

For broader browsing, see Network Monitoring and Hardware Monitoring Software.

Verdict

NetXMS is a strong choice for teams monitoring varied infrastructure across distributed or industrial sites, especially when they value open-source deployment, topology discovery and fine-grained control. Its central trade-off is operational: Windows server users face a 250-node cap without a valid license, while trial access requires contacting sales. Choose it when its breadth and protocol coverage justify that constraint; look elsewhere if you need an unrestricted Windows deployment or a self-serve trial.