An open source observability platform: Unify session replays, logs, traces, and errors – all without the Datadog price tag.
Cost / License
- Freemium
- Open Source (MIT)
Platforms
- Software as a Service (SaaS)
- Self-Hosted
- Docker




The best free alternative to ntop is HyperDX, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to ntop and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to ntop are DeepFlow, iftop, Ubikute Relay and Cacti.
An open source observability platform: Unify session replays, logs, traces, and errors – all without the Datadog price tag.




Unify your cloud-native monitoring with zero-code eBPF, advanced profiling, and 10x storage efficiency.




iftop does for network usage what top(1) does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "why is our ADSL link so slow?".






Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven. Along with being able to maintain graphs, data sources, and Round Robin archives in a...




nload is a console application which monitors network traffic and bandwidth usage in real time. It visualizes the in- and outgoing traffic using two graphs and provides additional info like total amount of transfered data and min/max network usage.


Netweak is a delightful, minimalist monitoring platform that gives you insights on performance and availability for your linux servers & websites.




Open source observability platform. SigNoz helps developers find issues in their deployed applications & solve them quickly.




SaaS monitoring tool for linux servers and websites. Think up-time robot but with more features. You can monitor your linux hosts, windows hosts under development.



wavemon is a wireless device monitoring application that allows you to watch signal and noise levels, packet statistics, device configuration and network parameters of your wireless network hardware. It should work (though with varying features) with all devices supported by the...




it's simple and runs in terminal