Spirent Communications plc provides automated test and assurance solutions for networks, cybersecurity, and positioning in the Americas, the Asia Pacific, Europe, the Middle East, and Africa. The company operates in Lifecycle Service Assurance and Networks & Security segments. The Lifecycle Service Assurance segment provides testing solutions for 5G mobile core networks, and cellular and Wi-Fi devices in the lab, as well as diagnoses, troubleshoots, and resolves issues with production networks and services.

The Networks & Security segment develops test methodologies, tools, and services for virtualised networks, cloud, and proactive security validation; and offers Ethernet/IP performance testing solutions, as well as provides navigation satellite system test and simulation solutions while addressing opportunities in the broader positioning, navigation, and timing market. The company was formerly known as Spirent plc and changed its name to Spirent Communications plc in May 2006. Spirent Communications plc was founded in 1936 and is headquartered in Crawley, the United Kingdom.