Self-hosted network visibility and presence scanner that discovers connected devices and alerts on new, unknown, or changed hosts across your LAN/Wi‑Fi.

7k stars426 forksGPL-3.0last commit Actively maintained
NETSCOUT nGeniusONE is a network and application performance monitoring platform that analyzes packet and flow data to deliver real-time service assurance, troubleshooting, and performance analytics for enterprise and service-provider networks.
Self-hosted network visibility and presence scanner that discovers connected devices and alerts on new, unknown, or changed hosts across your LAN/Wi‑Fi.

7k stars426 forksGPL-3.0last commit Actively maintained
Scanopy scans networks to discover hosts and services, then generates live, interactive topology diagrams and auto-updating network documentation.

5.6k stars284 forksAGPL-3.0last commit Actively maintained
Self-hosted platform for capturing SIP/RTP traffic, analyzing call flows, and monitoring VoIP quality metrics with dashboards and alerts.

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Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 3 shipped a commit in the last six months. Licences in this list: GPL-3.0, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Monitoring & Observability.