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Best Free Alternatives to Intermapper (by Fortra)
Stop paying Free (5 Devices) / ~$303/yr (25 Devices). Discover professional-grade tools that won't break your budget.
Category: Visual Network Mapping & NMSVerified for 2025
Top Recommended Replacements
Zabbix 7.0+
FREEBest Professional Free Alternative
Why we like it
100% free with no device or sensor limits; the 2026 builds feature native OpenTelemetry support and AI-driven trend analysis; massive scalability.
Keep in mind
Steep learning curve; the 'Network Maps' feature requires manual layout and lacks Intermapper's animated bandwidth 'ants'.
Auvik
Best for Automated Topology
Why we like it
Unmatched automated Layer 2/3 mapping; cloud-based with zero on-prem server maintenance; 2026 version features 'Auvik AI' for automated troubleshooting.
Keep in mind
Very expensive; pricing is based on network device counts and requires a custom quote.
Domotz
Best Value for Remote Sites
Why we like it
Flat-rate pricing per site with unlimited devices; excellent for multi-site WordPress agencies; includes remote power management (PDU) and desktop access.
Keep in mind
The map interface is less 'fluid' for massive local networks than Intermapper's native client.
Paessler PRTG
FREEBest 'Ease of Use' Choice
Why we like it
One-click deployment for Windows; includes beautiful 'Sunburst' maps; 'All-in-one' license covers NetFlow and SNMP in one tier.
Keep in mind
Pricing becomes extremely steep at scale; 500-sensor licenses start around $2,149/year.
Netdisco
FREEBest for Port-Level Discovery
Why we like it
Incredibly lightweight; exceptional at showing what is plugged into which switch port; completely free; handles multi-vendor hardware seamlessly.
Keep in mind
Lacks the high-end alerting and performance graphing found in Intermapper or PRTG.
UVexplorer
Best for Layer 2 Visibility
Why we like it
Highly precise Layer 2 mapping; integrates natively with PRTG and other NMS; affordable for mid-sized networks.
Keep in mind
Windows only; primarily focused on discovery/mapping rather than active, long-term performance monitoring.
Faddom
Best for Dependency Mapping
Why we like it
Agentless and sets up in under an hour; maps application dependencies (how your WP site talks to the DB); perfect for cloud migration audits.
Keep in mind
Lacks the 'live traffic' animations and physical hardware health focuses of Intermapper.
Checkmk (Raw Edition)
FREEBest High-Performance Monitor
Why we like it
Uses a unique 'micro-core' that handles 10x more checks per second than Nagios; exceptional for massive server farms; very easy to automate via CLI.
Keep in mind
The map feature is less developed in the 'Raw' edition compared to the commercial enterprise version.
Site24x7
Best SaaS for Hybrid Setup
Why we like it
Monitors everything from your aaPanel VPS to your office network; incredibly affordable starter plans; AI-powered anomaly detection.
Keep in mind
SaaS only (data leaves your network); pricing based on 'monitors' can be confusing as you scale.
Nmap (Zenmap)
FREEBest for Security Audits
Why we like it
The industry standard for discovery; Zenmap provides a visual 'Topology' view of network hops; 100% free.
Keep in mind
Static mapping only; no real-time alerting or bandwidth utilization animations.
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