There are a lot of less well known technology giants elsewhere in the world. E.g. ARM from the UK (now owned by Japanese giant SoftBank) has pretty much total domination on the smartphone CPU market (licensing anyway - lots of manufacturing is done by e.g. Samsung of Korea)
My mum will have heard of Facebook and Google, but I guarantee that she and probably most other people's mother's have never ever heard of ARM.
Just one example - countless others.