No, but neither do Roku. All three participate to embed their software (and hardware, probably) on smart TVs that other people make.

Amazon does in fact have their own brand TVs. I don't know if Google and Roku own a TV brand, but both provide the software that runs on TV's, and both require accounts and sell ads, so it comes out about even.

(Seehttps://www.amazon.com/firetv for Amazon brand TVs)

TV/streaming devices. Amazon's launched in 2014 and GoogleTV in 2010 according to wikipedia.

https://en.wikipedia.org/wiki/Google_TV_(2010%E2%80%932014)