IT services, consulting and business solutions organization Tata Consultancy Services, with a brand value of $8.7 billion in 2015, emerged as the fastest growing software brand globally for the past five years, a company statement said. "In the five year period 2010-2015, TCS emerged as the clear growth leader in the industry, increasing its brand value from $2.3 billion to $8.7 billion, while retaining the industry's highest brand strength rating of 'AA+'," the statement, quoting Brand Finance, said here Thursday.