HBO Max launched last week without any Roku support and integration, and new numbers from multiple research firms show just how much of a problem that might be for the new streaming service.

Roku dominates viewing time among streaming boxes. The company commands 44 percent of viewing time, according to research from Conviva. That more than doubles its biggest competitor, Amazon Fire TV, which maintains about 19 percent of viewing time. Roku has also grown its viewing time by about 50 percent year over year, based on official comments from the company.