Mike Cannon-Brookes, Scott Farquhar

Atlassian, based in ­Sydney, is an anomaly in modern-day techland: The enterprise software firm is 14 years old yet had one of 2015’s most successful IPOs. Cannon-Brookes and Farquhar, who met in college in their native Australia, colead the company, which provides collaboration software to 60,000 customers (Tesla, Amazon, P&G, and Coca-Cola among them). Farquhar heads ­engineering and research; Cannon-Brookes, product design and sales and marketing.