NetVizura NetFlow Analyzer Alternatives

Track, record, alert and visualize performance and availability of IT resources

open-source

Abusix is a network security company that offers email threat protection and network abuse handling solutions to ISPs, Telcos, and Cloud/Hosting Providers to stop the rapidly growing problem of email-borne threats and other kinds of network abuse.

freemium

FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.

freemium $115.0 / Monthly (for 10G of bandwidth)

Observium

NetCrunch IT Monitoring Platform is easy to start and enterprise scalable. It allows monitoring of systems, logs, applications, cloud and SNMP devices.

NfSen is a graphical web based front end for the nfdump netflow tools that allows you to:

Centreon is a network, system, applicative supervision and monitoring tool.

IPAM and DNS for Telecoms

nfsen-ng aims to be an in-place replacement for the ageing nfsen.

ThousandEyes is a Network Intelligence platform that delivers visibility into every network your organization relies on.

A fully featured network monitoring system that provides a wealth of features and device support.

Collections management for museums & galleries

Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.