CapAnalysis vs NETCAP

CapAnalysis is a free, open-source web visual tool for examining captured network traffic on Linux. It indexes PCAP datasets and displays TCP, UDP, and ESP streams or flows, including geographic connection views. The web viewer handles individual PCAP files and sets of files. TCP analysis reports bytes lost in each direction and total bytes exchanged without counting retransmitted packets. Deep Packet Inspection identifies more than 140 protocols, allowing protocol-based flow filtering. Other filters cover IP address or port, destination country, data size, and date and time. An included MaxMind database identifies destination countries for IPv4 and IPv6 connections. PCAP files can also be imported from public URLs, including URLs pointing to ZIP archives. Debian and Ubuntu packages are listed in 32-bit and 64-bit versions. After installation, users open the application through a browser on port 9877. The demo accepts PCAP files up to 20 MB and deletes dataset data the following day at 00:00 UTC.

NETCAP converts network packet streams into structured audit records for network analysis, security research, machine learning and forensics. Its free Core edition covers 66+ record types for protocols including TCP, UDP, HTTP, TLS, DNS and DHCP. Core captures live traffic, processes PCAP files, supports distributed collection and HTTP proxy capture, and outputs Protocol Buffers, CSV, JSON streams and Prometheus metrics. It is an open-source CLI under GPL-3.0, with platform binaries and Docker images.

Pro adds interactive graph analysis, a network activity timeline, investigation notes and more than 35 analysis modules. It can flag anomalies in decoded traffic and draft incident reports for editing; the maker says Pro analyzes captures locally without an upload step. Pro is available for macOS, Windows and Linux and includes email support. The plan is listed at $548 a month, with a €48/year option also shown, and a 14-day trial without a credit card. Enterprise has custom pricing and includes unlimited team seats, priority support with an SLA, custom integrations and volume licensing.