OpenAI is the market leader by far with the most name recognition. Google was the last to market. Its initial release of Gemini was a total flop because of the meme "Use elmer's glue on pizza to keep the cheese on". It has finally become more consistent, and it manages to compete with other models though I never see anyone recommending Gemini first.

All of these companies are in the red, but OpenAI has the most revenue.