Corelight is the equivalent of Snort going to Sourcefire, which improved speed, manageability and capabilities. Bro captures network packets and parses everything it sucks up into useful information. Corelight can handle deep packet inspection on networks up to 25Gbps, which is over 10 times what the typical open source deployment can handle. Over 10,000 different companies have tried or run Bro. Its awesomely powerful, but not easy to deploy. Corelight claims to have appliances in eight of the Fortune 50 companies.”]
Source: https://www.csoonline.com/article/3282805/review-corelight-is-a-worthy-network-packet-sniffer.html