People
Elon Musk is one of the most consequential founders alive. He has built or led companies in software, finance, space, automotive, AI, neural interfaces, tunneling, and social media. The thread tying it all together is a serious belief that humanity should become multi-planetary, and that he personally wants to die on Mars (just not on impact).
Right out of college, Elon and his brother Kimbal cofounded Zip2, an online city guide and business directory tool that they sold to newspapers like The New York Times and Knight Ridder. Compaq acquired Zip2 in 1999 for around $307 million in cash. Elon's first big payday came from this exit, and it set up everything that followed.
He took his Zip2 proceeds and founded X.com, an early online banking startup. X.com merged with Confinity, the company building PayPal, and the combined company eventually rebranded as PayPal. eBay bought PayPal in 2002 for about $1.5 billion in stock. Elon walked away with around $175 million, which he poured directly into his next two companies.
Founded in 2002 with the explicit goal of making humanity multi-planetary. Most space veterans thought it was a fool's errand. SpaceX has since:
SpaceX is arguably his most important company because it is the one that makes the Mars vision physically possible.
Elon was an early investor and joined Tesla as chairman in 2004, then became CEO in 2008 during a near-death moment for the company. Under his leadership Tesla:
Cofounded by his cousins, with Elon as chairman and primary funder. Tesla acquired SolarCity in 2016 to fold solar energy generation under the same roof as batteries and EVs.
Cofounded OpenAI in 2015 as a nonprofit research lab focused on safe AI. He left the board in 2018, citing potential conflicts of interest with Tesla's AI work. He has been a vocal critic of how OpenAI evolved into a capped-profit company tied to Microsoft, and is now competing with it directly through xAI.
Cofounded to build high-bandwidth brain-computer interfaces. The near-term goal is helping people with paralysis, blindness, and other neurological conditions. The long-term goal Elon talks about is achieving symbiosis with AI so humans are not left behind cognitively. Neuralink has implanted devices in human patients and demonstrated cursor control by thought.
Started as a side bet on tunneling to solve traffic in cities. The company built the Las Vegas Convention Center Loop and continues to pitch underground transit systems and faster, cheaper tunneling tech.
Acquired Twitter in October 2022 for about $44 billion, took it private, and rebranded the platform as X. He has positioned X as an "everything app" combining social media, payments, video, and AI. The acquisition was financially controversial but reshaped global discourse around tech, media, and free speech.
Founded xAI in 2023 to compete with OpenAI, Anthropic, and Google DeepMind. The company built Grok, a family of large language models integrated into X. xAI has rapidly stood up some of the largest training clusters in the world and is openly racing toward frontier AI capability.
As of 2026, Elon is simultaneously running or leading SpaceX, Tesla, X, xAI, Neuralink, and The Boring Company. He is consistently the wealthiest or near-wealthiest person on Earth, mostly through Tesla and SpaceX equity. He is also deeply involved in U.S. politics and government efficiency efforts, which has made him both more powerful and more polarizing than ever.
His attention is increasingly split between AI (xAI plus Tesla's autonomy stack) and getting Starship operational for Mars, which he openly considers his life's most important work.
The single most interesting thing about Elon is that his stated personal goal is to die on Mars. Not on impact, as he likes to say, but as a permanent resident of the planet. He wants to make humanity a multi-planetary species so that a single catastrophe on Earth, whether natural or self-inflicted, does not end us.
The plan, in rough sequence, looks like this:
He has talked about humans on Mars within his lifetime, and the timeline keeps getting more concrete as Starship matures. Whether the dates slip or not, this is the first time in human history that a private company has the rocket, the capital, and the will to actually attempt it.
Most founders pick one industry. Elon picked the hardest problems in several at once and built companies in each that are now category-defining. The pattern is:
You do not have to agree with everything he does to recognize that the rate at which one person has shifted electric vehicles, space, payments, AI, and brain-computer interfaces is genuinely unusual in history.