OpenAI owns ChatGPT, with the OpenAI Foundation overseeing its governance to...

https://smoothdecorator.com/is-the-openai-foundation-the-same-thing-as-the-old-openai-nonprofit/

OpenAI owns ChatGPT, with the OpenAI Foundation overseeing its governance to ensure responsible development. Microsoft is a key investor, providing significant funding and cloud support, but it is not the parent company