Steam has close enough to a monopoly but that's more of a failure of other companies to offer a truly suitable competitor.
And when I say that I mean Steam is FUCKED when owner Gabe Newell dies, most business types have no idea how a business like Steam should work.
72% of devs believe Steam has a monopoly on PC games:
The independent study, conducted by Atomik Research, surveyed 306 industry executives across the UK and USA between May 18 and 22, 2025.
>75% of respondents were senior managers or C-suite level, with 77% from studios with more than 50 employees.
>The study found that for most studios, Steam accounts for over 75% of revenue.