Colasoft Capsa is described as 'Capsa performs real-time packet capturing, 24/7 network monitoring, protocol analysis, in-depth packet decoding, and automatic expert diagnosis' and is a network analyzer in the network & admin category. There are more than 10 alternatives to Colasoft Capsa for a variety of platforms, including Windows, Linux, Mac, BSD and Self-Hosted apps. The best Colasoft Capsa alternative is Wireshark, which is both free and Open Source. Other great apps like Colasoft Capsa are tcpdump, NetworkMiner, PCAPdroid and Impacket.
Wireshark is a premier network protocol analyzer used globally in industries and education, offering multi-platform support, deep protocol inspection, powerful display filters, and VoIP analysis. It allows both live capture and offline analysis, supporting various networks and protocols.
Command-line packet analyzer for monitoring, capturing, and filtering network traffic in real time. Supports TCP/IP protocols, pcap file export, BPF syntax, timestamped outputs, and works on UNIX-like systems with both wired and wireless interfaces.
NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows. NetworkMiner can extract transmitted files and certificates from PCAP files containing HTTP, FTP, SMB, SMB2, TFTP and several other protocols.
PCAPdroid is an android app to capture the phone traffic and analyze it remotely (e.g. via Wireshark). The traffic can be easily downloaded from a remote device thanks to the integrated HTTP server, or streamed to a remote UDP receiver.
Impacket is a collection of Python classes for working with network protocols. Impacket is focused on providing low-level programmatic access to the packets and for some protocols (e.g. SMB1-3 and MSRPC) the protocol implementation itself.
Ettercap is a suite for man in the middle attacks on LAN. It features sniffing of live connections, content filtering on the fly and many other interesting tricks.
Discover and capture container network traffic from your comfy desktop Wireshark, using a containerized service and a Wireshark plugin.
Packet capture/Network traffic sniffer app with SSL decryption. Not that feature rich yet, but it's a powerful debugging tool especially when developing an app.
Appknox is a mobile app security testing solution to detect and fix vulnerabilities in mobile apps using a combination of automated and manual tests.
VisualEther turns Wireshark packet captures into readable sequence diagrams — and lets an AI agent reason about them. Built on tshark, it reconstructs multi-layer protocol conversations (5G NR/core, LTE, IMS/VoLTE, SIP/RTP, BGP, OSPF, DNS, HTTP/2 & HTTP/3, TLS, Kerberos...
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