Network / NMS
Netdisco
open source / community
Network discovery + inventory — collects IP/MAC/ARP/CDP/LLDP into PostgreSQL to answer "what's plugged into which switch port, and where did this MAC go?"
- Category
- Network / NMS
- License
- Open source
- Deployment
- Self-hosted
- Cost
- Free
- Free tier
- Yes
- Self-host effort
- Moderate
- Maturity
- Established
- Popularity
- Respected niche discovery tool
The catch
Explicitly not a performance monitor or alerting tool — no graphs, no up/down alarms — so you pair it with Zabbix/LibreNMS/Grafana for the actual monitoring.
Monitors
Network
Protocols
SNMP
Capabilities
AutodiscoveryTopology mapping
Built for
Mid-marketEnterprise
The honest take
The “which port is this device on?” tool, and it’s great at exactly that. Not a monitor — a discovery/inventory companion that lives next to your real NMS.