See how different Elon Musk, Jeff Bezos, and other tech CEOs looked when they first started their companies

Bezos founded Amazon from his garage in Bellevue, Washington, in 1994. He attributes his new look partly to working out with a celebrity personal trainer and changing his diet.

Meta CEO Mark Zuckerberg started Facebook from his dorm room at Harvard in 2004.

Gone are the days of the Zuck who famously wore the same thing every day to save brainpower for more important decisions. Instead, Zuck can now be seen sporting graphic tees and chain necklaces.

Part of Zuckerberg's physical transformation also stems from hobbies like Brazilian jiu-jitsu and MMA fighting.

Dell is another member of the college dropouts-turned-tech founders club.

Larry Page and Sergey Brin founded Google in 1998.

The photo at left shows Musk in 1999, around the time the "PayPal mafia" was formed.

Musk has said he doesn't care for exercise and "almost never" works out, though he's credited fasting and the weight loss drug Wegovy with his appearance today.

Gates and the late Paul Allen cofounded Microsoft from a garage in Albuquerque, New Mexico, in 1975.

Twitter was founded in 2006. Cofounder Dorsey has been seen with a full beard pretty regularly since departing as CEO and focusing his efforts more on cryptocurrency at Block, formerly Square.

Richard Branson started the Virgin brand in 1970 with a mail order record business.

At 73 years old today, Branson's day-to-day life still features plenty of exercise, from tennis and cycling to kite-surfing.

Alibaba Group founder Jack Ma disappeared from public view in 2020 after criticizing China's financial regulation system. He resurfaced in Thailand in 2022 and has been teaching as a visiting professor at the University of Tokyo.

Anne Wojcicki founded genetic testing company 23andMe in 2006.

Whitney Wolfe Herd founded Bumble in 2014 and stepped down as CEO last year.

Evan Spiegel co-founded Snap, which owns services like Snapchat, in 2011.