NetScout Systems was founded by Anil Singhal and Narendra Popat as Frontier Software in 1984.

[6] In April 2011, NetScout acquired voice and video management company, Psytechnics, from Ipswich U.K.[7] It then acquired Fox Replay, a privately held Dutch company in 2011,[8] and later that year, after many years of partnering and complementing solutions for network switch port aggregation, NetScout moved directly into competition with its partners by acquiring privately held Simena Networks.

[9] In October 2014, NetScout Systems announced it had entered into a definitive agreement to acquire the Communications business of science and technology company Danaher Corporation for about $2.6 billion.

[10] Analyst firm 451 Research, a technology-industry syndicated research and data firm, predicted in May 2015 that with the acquisition, NetScout will be the largest company in the network visibility management space, with "more than 3,000 employees and well over $1bn a year in revenue".

[3] In a prepared statement, the company noted that the acquisition "accelerates NetScout's strategic progress by enabling the company to offer [...] innovative service assurance and cyber security solutions" and adds new employees to NetScout.