Age 23
Brian Wong
Founder, Kiip
Wong is one of the youngest people to ever receive venture capital. He did so for his mobile advertising network, Kiip, which rewards consumers for engaging with ads. He skipped four grades in school, and graduated college when he was 18.

Age 24
Evan Spiegel
CEO, Snapchat
As the creator of an app with 100 million users around the world, Spiegel is a dominant force in tech. Snapchat recently raised $US20 million at a $US10 billion valuation, and it also announced plans to integrate advertising by November.

Age 25
Fred Ehrsam
Founder, Coinbase
Ehrsam is one of the cofounders of Coinbase, a digital wallet for Bitcoin, which has raised $US31.7 million in funding from prominent investors including Andreessen Horowitz, Union Square Ventures, and Ribbit Capital.

Age 26
Krishna Gupta
Founder, Romulus Capital
As a senior at MIT, Gupta founded Romulus Capital to help foster younger startups and the innovation coming from the area’s students. The VC has raised $US50 million and invested in 20 companies. One of his investments, Crocodoc, was acquired by Box.

Age 27
Eric Migicovsky
Founder, Pebble | https://getpebble.com/
Migicovsky’s smartwatch is one of the most-watched wearable tech brand, after starting as a Kickstarter project a few years ago. Pebble has raised $25.7 million in funding and has 35 employees. There are more than 300,000 Pebble watches on wrists all over the world, with more than 500 apps specifically made for the watch.

Age 28
David Karp
Founder, Tumblr
Karp’s unnaturally accelerated success with Tumblr completely negates the fact that he didn’t even finish traditional high school. Yahoo paid $1.1 billion in cash for his company last year, and Karp remains CEO. Karp ranked No. 2 on Business Insider’s 2013 Silicon Alley 100 list.

Age 29
Brian Chesky
Founder, Airbnb
n 2008, Chesky along his two 20-something cofounders Joe Gebbia and Nathan Blecharczyk, launched Airbnb. It made a splash at Y Combinator Demo Day and later became the program’s first billion-dollar company. The peer-to-peer apartment rental site has raised $120 million at a $1.3 billion valuation.

Age 29
Adam D’Angelo
Founder, Quora
After serving as Facebook’s first CTO, D’Angelo decided to start the question and answer social platform Quora, which has since
raised about $US80 million at a near-billion dollar valuation. It employs more than 90 people, and users are posting three times as many answers on the platform now than they did at the beginning of the year.

Age 30
Mark Zuckerberg
CEO, Facebook
He’s built the largest social network ever, with over 1 billion users, and from WhatsApp to Oculus VR, Zuckerberg has overseen a number of huge Facebook acquisitions in the past year. His current net worth is $US33.4 billion, making him one of just three people who have more billions under their belt than years lived.

Age 31
Ben Silbermann
Founder, Pinterest
Silbermann left Google to found a company, and after a few false starts landed on the picture collection social platform Pinterest. Last year alone, Pinterest raised a total of $US425 million. Its latest $US225 million round gives the social sharing site a $US3.8 billion valuation.

Age 32
Ben Lerer
CEO, Lerer Ventures
Lerer and his $US60 million fund have invested in companies such as The Huffington Post, OMGPOP, Warby Parker, BuzzFeed, GroupMe, and Venmo. Also, Lerer Ventures is an investor in Business Insider.

Age 33
Andrew Mason
Founder, Groupon and Detour
Though Mason is no longer at Groupon, he is already onto his next project, Detour, which creates GPS-based audio walking tours for different neighborhoods. And we’re not too worried about Mason — he left Groupon worth more than $US400 million.

Age 34
Sean Parker
Co-founder, Napster
Parker spent eight years as a partner at Peter Thiel’s Founders Fund before leaving earlier this year. As the co-founder of Napster and founding president of Facebook, Parker has a successful track record in entrepreneurship. He’s an investor and board director for Spotify, with an estimated net worth of $US2.7 billion.

Age 36
Danae Ringelmann
Co-founder, IndieGogo
Ringelmann co-founded the crowdfunding site IndieGoGo in 2008 to democratize investing. The site has since launched more than 200,000 campaigns and has received $US56.5 million in funding.

Age 37
Jack Dorsey
CEO, Square
With Twitter going public and Square reaching a payment volume of $US20 billion, Jack Dorsey undoubtedly had a huge year. Dorsey was Twitter’s CEO from 2006 to 2008. His stake in Twitter alone would have made him a billionaire, although he was one already. Since his involvement in Square and Twitter apparently isn’t enough to keep him busy, Dorsey joined Disney’s board in December.

Age 38
Travis Kalanick
CEO, Uber
Kalanick has become one of the brightest new stars of Silicon Valley this year thanks to Uber, his on-demand car service app. Uber has become one of the most well-known and talked-about car services in the space, with Kalanick at its helm. It’s been getting into some trouble with Lyft recently, but it’s backed by $US1.5 billion of funding, valued at $US18.2 billion, and doubling revenue every six months.

Age 39
Marissa Mayer
CEO, Yahoo
This former Googler is proof you can teach old dogs — like ageing Internet giant Yahoo — new tricks. In her two years since taking the reins, she got a redesign to go through, put mobile first (and meant it), and acquired an insane number of companies. Called a ‘destroyer of startups,’ Mayer has ransacked Silicon Valley to cobble together a younger, hipper team at Yahoo.

Age 40
Jonah Peretti
Founder, BuzzFeed
Peretti has built BuzzFeed up as one of the most talked-about digital publications. BuzzFeed has a $US850 million valuation, reaches 150 million unique users a month, and is now even working on a game studio. The publication is also trying to beef up its business vertical with some new hires.

Age 41
Sergey Brin and Larry Page
Co-founders, Google
Brin and Page are the geniuses behind Google. Brin is responsible for trying to decide which ideas Google will pursue, overseeing Google X’s ‘moon shots,’ and the hush-hush long-term projects that try to tackle big problems — think Google Glass, driverless cars, smart contacts for diabetics, and flying wind turbines that generate power. Page leads as the CEO of Google, and makes sure the company is still dominating in search and ads.