Fast Company reports that "Amazon Massively Inflates its Streaming Library Size." While Amazon claims 17,000 titles, they only offer 1,745 movies and the rest are TV shows.
Amazon reached that number by counting each episode of a TV series as an individual TVshow. For example, Amazon does not count 24 as one TV show; rather, it counts every episode in all eight seasons toward its library of 17,000 movies and television shows. So, according to Amazon's logic, Kiefer Sutherland stars in 192 TV shows. Amazon counts The X-Files more than 200 times and Grey's Anatomy 170 times. Sure, there's an arguable distinction between all the offshoots of Power Rangers (Mighty Morphin, Dino Thunder, Space Patrol Delta). But by Amazon's figures, Power Rangers-related episodes are counted as about 715 shows in its streaming library--that is, 4.2% of the 17,000 movies and television shows Amazon says it offers.
Netflix is also mentioned in the article:
Netflix declined to provide the specific tally. "We do not disclose the number of viewables on Netflix," a spokesperson said. "A primary reason is that the title count fluctuates a lot as titles come in and out of window. Additionally, while we do have the biggest streaming library, we don’t want people to measure us by title count. The number of titles does not equate to member happiness or viewing pleasure."
Daniel Choi, the creator of InstantWatcher.com, a website that uses Netflix's API to track streaming movies and TV shows, says the number of movies and TV shows available on Netflix's streaming service is significantly less than 60,000. "According to our count, it's about 13,000," Choi explains, indicating that about 9,500 of those titles are movies. "But there are two different ways of counting. We count all television series as one title each. If you split up the TV series into individual episodes, that count will go up."