Worldwide security software revenue totaled $22.1 billion in 2015, a 3.7 percent increase from 2014, Gartner data showed.
Security information and event management (SIEM) remained the fastest-growing segment in 2015, with 15.8 percent growth.
Meanwhile, consumer security software showed the sharpest decline at 5.9 percent year on year.
Symantec maintained the top position, despite the company suffering revenue decline for the third consecutive year.
Its security software revenue declined 6.2 percent to $3.4 billion. In 2015, 74 percent of Symantec’s revenue came from the consumer and endpoint protection platform (EPP) categories.
Intel’s security software revenue also declined in 2015, with revenue falling 4.1 percent to $1.75 billion, led by a fall in consumer and EPP markets.
IBM was the only one of the top five vendors to show growth. IBM’s security software revenue grew 2.5 percent to total $1.45 billion in 2015.
IBM’s growth was driven by its positive performance in the SIEM segment and its significant services business.
“The below-market growth seen by these large vendors with complex product portfolios is in contrast to the market growth and disruption being introduced by smaller, more specialized security software vendors,” said Sid Deshpande, principal research analyst at Gartner.