The researchers looked at the European market and focussed on Amazon, Google, Meta and Microsoft.
While Meta, the owner of Facebook, was criticised for being the source of adverts for illegal streams, the technology of the other three was blamed for the increase in piracy.
The Amazon Fire Stick is a major cause of the problem, according to the report.
The device plugs into TVs and gives the viewer thousands of options to watch programmes from legitimate services including the BBC iPlayer and Netflix.
They are also being used to access illegal streams, particularly of live sport.
In November last year, a Liverpool man who sold Fire Stick devices he reconfigured to allow people to illegally stream Premier League football matches was jailed.
After uploading the unauthorised services on the Amazon product, he advertised them on Facebook.
Another man from Liverpool was given a two-year suspended sentence last year after modifying fire sticks and selling them on Facebook and WhatsApp.
According to data for the first quarter of this year, provided to Enders by Sky, 59% of people in UK who said they had watched pirated material in the last year while using a physical device said they had used a Amazon fire product.
The Enders report says the fire stick enables “billions of dollars in piracy” overall.
A spokesperson from Amazon, who are sports rights holders themselves, told BBC News: “Pirated content violates our policies regarding intellectual property rights, and compromises the security and privacy of our customers.”
They said Amazon worked hard to protect customers from the risks associated with pirated content, and warned customers about installing or using apps from “unknown sources”.
Amazon has also made changes to its Fire devices to make it harder for people to stream pirated content, they added.
Meta has made no comment.
