Wireshark is described as 'Foremost network protocol analyzer with multi-platform support, deep protocol inspection, VoIP analysis, and extensive file format compatibility' and is a leading network analyzer in the network & admin category. There are more than 50 alternatives to Wireshark for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Wireshark alternative is tcpdump, which is both free and Open Source. Other great apps like Wireshark are CloudShark, Intercepter-NG, NetworkMiner and Proxyman.
It can do automated analysis of a packet capture.