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12 Best OpenNMS Alternatives in 2026, Free Options Included

Explore 12 alternatives to OpenNMS, vetted by our editors with real user reviews, pricing, and feature comparisons.

The best free OpenNMS alternatives, ranked by SpotScore

Quick answer

Looking for a OpenNMS alternative? The top picks are Domotz PRO, Opsview and SolarWinds Network Performance Monitor. Domotz PRO comes out ahead with a SpotScore of 9.4 and a 4.86★ rating. See all 12 compared on score, rating, and price below.

A tool that fits one team can frustrate another, so if OpenNMS is frustrating yours, these 12 network monitoring software free alternatives are worth a look. We rank them by SpotScore, which combines verified user satisfaction with market presence, then ratings and pricing. The table gives a quick side-by-side; the sections below explain each pick.

ProductSpotScoreRatingPricingBest for
Domotz PROEffortlessly manage your home network with Domotz PRO.9.4★★★★★ 4.86(29)Freefrom $19/moteams of all sizes
OpsviewEnhance network performance with advanced visibility.8.6★★★★☆ 3.68(22)FreeFree Trial · Quotation Basedteams of all sizes
SolarWinds Network Performance MonitorKeep your network performing at its best.8.2★★★★★ 4.54(210)FreeFree Trial · Subscription · Quotation Basedteams of all sizes
Sophos CentralSimplify your security with Sophos Central.8★★★★☆ 4.17(24)FreeFree Trial · Quotation Basedteams of all sizes
Trisul Network AnalyticsUncover network insights in real-time.7.9★★★★☆ 4.17(3)FreeFree Trial · One-time license · Quotation Basedteams of all sizes
PulsewayEfficient IT management at your fingertips.9.8★★★★★ 4.5(62)FreeFree Trial · Subscriptionteams of all sizes
PRTG Network MonitorMonitor your network with ease.9.8★★★★★ 4.5(332)FreeFree Trial · One-time licenseteams of all sizes
ZabbixMonitor everything, stay in control.9.6★★★★☆ 4.42(161)FreeFreemium · Open-sourceteams of all sizes
ConnectWise AutomateStreamlining IT management for seamless operations.9.5★★★★☆ 4.27(141)FreeFree Trial · Quotation Basedteams of all sizes
Nagios XIEmpower Your IT Decisions with Proactive Monitoring.9.5★★★★☆ 4.36(15)FreeFree Trial · Freemium · One-time license · Open-sourceteams of all sizes
SolarWinds RMMMaximize network performance with SolarWinds RMM.9.5★★★★☆ 4.3(128)FreeFree Trial · Quotation Basedteams of all sizes
AuvikStay ahead with Auvik's smart network monitoring.9.4★★★★★ 4.65(301)FreeFree Trial · Quotation Basedteams of all sizes

9.4

SpotScore

Domotz PRO - Network Monitoring Software

Domotz PRO

Effortlessly manage your home network with Domotz PRO.

Best for: SMB teams · Mid-market · Enterprise

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What is Domotz PRO?

Domotz is an easy way to monitor the status of all home devices and servers. It can track any device on the LAN (Local Area Network) like servers, routers, switches, NAS (network attached storage) drives, internet gateways (like DSL or cable modems), IP cameras, motion sensors, etc. It combines ...

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8.6

SpotScore

Opsview - Network Monitoring Software

Opsview

Enhance network performance with advanced visibility.

Best for: SMB teams · Mid-market · Enterprise

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What is Opsview?

The Opsview Network Monitoring Software gives user a greater visibility into network status and performance, helping to secure the network, reduce downtime and improve efficiency. It provides a single-pane-of-glass view of end to end IT infrastructure performance by monitoring servers, ...

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Opsview offers custom pricing plan

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8.2

SpotScore

SolarWinds Network Performance Monitor - Network Monitoring Software

SolarWinds Network Performance Monitor

Keep your network performing at its best.

Best for: SMB teams · Mid-market · Enterprise

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What is SolarWinds Network Performance Monitor?

SolarWinds Network Performance Monitor (NPM) provides a powerful and budget friendly solution for network monitoring. Detect and resolve network performance issues and outages without delay. An ideal choice for both online and onsite monitoring scenarios. Get the best of both worlds for an ...

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Free TrialTry Free →·

SolarWinds Network Performance Monitor offers custom pricing plan

8.0

SpotScore

Sophos Central - Network Monitoring Software

Sophos Central

Simplify your security with Sophos Central.

Best for: SMB teams · Mid-market · Enterprise

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What is Sophos Central?

Sophos Central is an all-in-one cloud-based security management solution that enables you to streamline and synchronize your network security. With its unified management console, sharing essential information between products and automated incident response, handling and managing all your ...

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Free Trial·

Sophos Central offers custom pricing plan

7.9

SpotScore

Trisul Network Analytics - Network Monitoring Software

Trisul Network Analytics

Uncover network insights in real-time.

Best for: SMB teams · Mid-market · Enterprise

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What is Trisul Network Analytics?

Trisul is an extremely powerful monitoring and analytics tool that helps user to find and fix the performance and availability problems of networks and applications. It provides a vast number of rich, interactive dashboards that provide real-time visibility into network and application ...

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Free TrialTry Free →·

Trisul Network Analytics offers custom pricing plan

9.8

SpotScore

Pulseway - Network Monitoring Software

Pulseway

Efficient IT management at your fingertips.

Best for: SMB teams · Mid-market · Enterprise

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What is Pulseway?

Pulseway is a Remote Monitoring & Management software built for MSPs and IT teams. It provides unprecedented control over operations and helps reduce downtime and increase efficiency through advanced automation. With the mobile application, IT technicians can detect problems and resolve them ...

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Free Trial·

Starts from $19/Month when Billed Yearly

9.8

SpotScore

PRTG Network Monitor - Network Monitoring Software

PRTG Network Monitor

Monitor your network with ease.

Best for: SMB teams · Mid-market · Enterprise

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What is PRTG Network Monitor?

Network Monitor is a powerful and comprehensive network monitoring software for Windows and Linux systems. The PRTG Network Monitor offers continuous monitoring of all important parameters of servers, PCs, and other network equipment and notifies whenever a problem occurs or even predicts ...

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Free TrialTry Free →

9.6

SpotScore

Zabbix - Network Monitoring Software

Zabbix

Monitor everything, stay in control.

Best for: SMB teams · Mid-market · Enterprise

Try for Free

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What is Zabbix?

Zabbix is an enterprise-class network monitoring solution designed to monitor and track the status of various network services, servers, and other network hardware. Designed for scalability and availability, Zabbix is able to monitor complex infrastructures consisting of thousands of nodes and ...

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9.5

SpotScore

ConnectWise Automate - Network Monitoring Software

ConnectWise Automate

Streamlining IT management for seamless operations.

Best for: SMB teams · Mid-market · Enterprise

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What is ConnectWise Automate?

ConnectWise Automate is an intelligent remote monitoring and management software system that proactively detects and resolves IT issues network bottlenecks, application performance issues, and security threats before clients are aware of them. By automating Tier 1 support tasks, the system ...

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Free Trial·

ConnectWise Automate offers custom pricing plan

9.5

SpotScore

Nagios XI - Network Monitoring Software

Nagios XI

Empower Your IT Decisions with Proactive Monitoring.

Best for: SMB teams · Mid-market · Enterprise

Start Free Trial

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What is Nagios XI?

Nagios XI is a powerful network monitoring platform designed to help organizations worldwide make important IT infrastructure decisions with confidence. Powerful integrated add-ons allow for distributed IT management, DevOps integration, and proactive problem resolution when things go wrong. It ...

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Free TrialTry Free →

9.5

SpotScore

SolarWinds RMM - Network Monitoring Software

SolarWinds RMM

Maximize network performance with SolarWinds RMM.

Best for: SMB teams · Mid-market · Enterprise

Start Free Trial

Add to compare

What is SolarWinds RMM?

SolarWinds Network Performance Monitor (NPM) is a powerful network monitoring application that continuously collects, measures, stores, displays, and alerts on network performance data. NPM provides meaningful information about LAN and WAN environment including actual bandwidth utilization ...

Read more about SolarWinds RMM
Free TrialTry Free →·

SolarWinds RMM offers custom pricing plan

9.4

SpotScore

Auvik - Network Monitoring Software

Auvik

Stay ahead with Auvik's smart network monitoring.

Best for: SMB teams · Mid-market · Enterprise

Start Free Trial

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What is Auvik?

Auvik is a cloud-based network monitoring and management platform for small to mid-sized IT teams. It automatically maps the network, tracks hardware inventory and lifecycle data, monitors for outages, and provides CLI command execution and configuration change tracking to speed up troubleshooting.

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Auvik offers custom pricing plan

How OpenNMS competitors stack up

OpenNMS competes with 12 other network monitoring software tools tracked on Spotsaas. The closest by feature overlap are Domotz PRO, Opsview and SolarWinds Network Performance Monitor. Each is compared against OpenNMS on rating, pricing and feature coverage below.

What else works like OpenNMS?

Searches for "sites like OpenNMS" and "apps like OpenNMS" land on the same set of options as "OpenNMS alternatives" — the 12 options below cover both, whether you want a like-for-like replacement or something lighter.

Why these OpenNMS alternatives made the cut

Domotz PRO9.4Best for teams of all sizes

Real-time monitoring and alerts, enabling quick issue resolution and proactive support for clients.

Watch for: Pricing model may lead to confusion, especially with changing costs over time.

Opsview8.6Best for teams of all sizes

Opsview Monitor is well built, with tightly written healthy code.

Watch for: Limited support responsiveness and communication for cancelling orders or resolving issues.

SolarWinds Network Performance Monitor8.2Best for teams of all sizes

Powerful network monitoring

Watch for: May require technical expertise

Sophos Central8Best for teams of all sizes

A single web console centrally manages endpoint, firewall, server, switch, and other Sophos products.

Watch for: Several reviewers report it is memory- and resource-intensive, impacting system performance.

Trisul Network Analytics7.9Best for teams of all sizes

Real-time performance monitoring

Watch for: Steep learning curve

Pulseway9.8Best for teams of all sizes

Easy to use interface, accessible via mobile devices, making remote monitoring and management convenient.

Watch for: Some users experienced struggles with customer support in resolving issues promptly.

PRTG Network Monitor9.8Best for teams of all sizes

Clear interface makes network monitoring accessible for daily use.

Watch for: New users may need significant time to learn the full feature set without formal training.

Zabbix9.6Best for teams of all sizes

Highly customizable with the ability to define triggers, thresholds, and actions based on specific requirements.

Watch for: Complexity in user interface may pose a challenge for beginners, requiring some time to overcome.

ConnectWise Automate9.5Best for teams of all sizes

Wide range of third-party integrations support task and update automation across tools.

Watch for: Setup is complex with a steep learning curve, particularly for new users.

Nagios XI9.5Best for teams of all sizes

Highly effective in monitoring large network end-to-end, providing detailed information on uptime, downtime, and device failures.

Watch for: Occasional app hangs affecting user experience.

SolarWinds RMM9.5Best for teams of all sizes

Covers monitoring, patch management, remote access, and alerting in one platform.

Watch for: Interface and feature structure require time to learn, especially for new users.

Auvik9.4Best for teams of all sizes

Provides real-time visibility into network infrastructure, making network management more efficient.

Watch for: The feature richness and customization options may overwhelm beginners without adequate support.

Why teams look for a OpenNMS alternative

The motivation to leave OpenNMS usually centers on a few specifics:

  • Java dependency may be limiting
  • Can be resource-intensive
  • User interface may feel outdated
  • Limited community support

The things that matter when replacing OpenNMS

How these 12 network monitoring software free alternatives measure up: 12 offer a free tier; paid plans run $19, with Domotz PRO the cheapest entry point; and Domotz PRO is the highest rated at 4.86★ across 29 reviews.

How the order works.

Frequently Asked Questions (FAQs)

Stuck on something? We're here to help with all the questions and answers in one place.

The top-rated alternatives to OpenNMS are Domotz PRO (4.9★), Auvik (4.7★), SolarWinds Network Performance Monitor (4.5★). Compare all 12 alternatives side-by-side above.

When evaluating alternatives to OpenNMS, prioritize: Resource Management, transparent pricing, free trial availability, and integrations with your existing tools. Use the filters above to compare by feature, budget, and team size.

Migration difficulty depends on how deeply OpenNMS is integrated into your workflows. Most alternatives offer data export/import tools and dedicated onboarding support. We recommend narrowing to 2–3 options, running a free trial, and checking each vendor's migration guides before committing.

How to decide on a OpenNMS alternative

  • On a budget / just exploring: start with a free tier — Domotz PRO, Opsview and SolarWinds Network Performance Monitor let you evaluate without paying upfront.
  • If real-user ratings matter most: Domotz PRO has the strongest star rating (4.86★) among the options with verified reviews.
  • Want the safest pick: Domotz PRO has the highest Spotsaas Score (9.4) in this list — a strong default if you're unsure.

Making the move from OpenNMS

A clean break from OpenNMS starts with your data. Export it, verify the new tool can take it in, and check that your core workflows carry over. Pilot the switch with a small team or project before going all in, and don't cancel OpenNMS until the migration's finished. Free trials above make testing low-risk.

Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].