OpenAI (2015)

OpenAI is a non-profit company that researches artificial intelligence. The background: Musk is afraid that the big corporations will shape AI. Hence the creation of OpenAI. "Our mission is to ensure that artificial intelligence benefits all of humanity," the website says.

Investors include Microsoft, LinkedIn co-founder Reid Hoffman's charitable foundation, and venture capital firm Khosla Ventures.

In 2018, Musk left OpenAI to avoid a potential conflict of interest with Tesla. The car company is also researching AI. Musk, however, remains with the company as a donor and advisor.