ChatGPT is owned by OpenAI, the organization that developed the AI platform....

https://wiki-square.win/index.php/Does_Microsoft_Have_Voting_Control_Over_OpenAI%3F

ChatGPT is owned by OpenAI, the organization that developed the AI platform. The OpenAI Foundation oversees governance to guide its mission and ensure responsible use. Microsoft is a significant investor and partner but does not own or control ChatGPT