Jeff Bezos started Amazon when he was 30 years old.

Bezos's birth date and the date he started Amazon (its founding or incorporation in 1994) settle this. True: he was 30 years old when he founded or incorporated Amazon. Mostly true: his age at founding was 30, but the age at another start-up milestone (for example, the public website launch) differs by a year. Mixed: credible founding milestones give materially different ages, and 30 is right for only some of them. Mostly false: he was 29 or 31 at the founding. False: his age at the founding was clearly different (for example, under 29 or over 31).

Set before the research began.

1. E1 Jeff Bezos Fast Facts | CNN CNN · 5 April 2013

   “Birth date: January 12, 1964”

2. E2 Jeff Bezos Fast Facts | CNN CNN · 5 April 2013

   “May 26, 2021 - During the company’s annual shareholder meeting, Bezos announces that he will officially step down from his role as chief executive officer on July 5. That is the anniversary of the date Amazon was incorporated in 1994.”

3. E3 Amazon turns 30 – what will the next decade bring? MoneyWeek · 12 July 2024

   “On 5 July 1994, he incorporated his company in Washington State under the name Cadabra, but changed it to Amazon”

4. E4 From books to everything: How Bezos conquered the web with Amazon The National (Scotland) · 5 July 2019

   “Amazon was incorporated on July 5, 1994, by its founder Jeff Bezos, a 30-year-old banker with computing expertise”

CNN gives Bezos's birth date as January 12, 1964 (E1). CNN and MoneyWeek both say Amazon was incorporated on July 5, 1994 (E2, E3). That makes him 30 at incorporation, and The National describes him as a 30-year-old at that time (E4).