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)

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

Roku makes TV, as well as Amazon.

All 3 make streaming devices (Stick, set-top box, etc).

Show me a listing for a Roku made TV? All the ones I've seen are for like a TCL Roku tv. Same for Amazon, usually the same makers.

n/m I do see that Roku sells tvs under its own name now. That's a change from the last time I looked.

Sure:

https://www.roku.com/products/roku-tv

https://www.amazon.com/dp/B0DD2P7YVW

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)

Amazon has Fire TVs as well as the 'Fire stick' you're talking about.

I still use a Chromecast 2 on my non connected TV. Works well.