The research by Enders Analysis accuses Amazon, Google, Meta and Microsoft of "ambivalence and inertia" over a problem it says costs broadcasters revenue and puts users at an increased risk of cyber-crime.
Gareth Sutcliffe and Ollie Meir, who authored the research, described the Amazon Fire Stick - which they argue is the device many people use to access illegal streams - as "a piracy enabler".
Enders say there are often multiple streams of individual events - such as high profile football games - each of which can have tens of thousands of people watching them.