It’s like Richard Stallman is reading my blog! 🙂 Haha, is joke.
Finally, don’t forget the software in your own computer. If it is the non-free software of Apple, Google or Microsoft, it spies on you regularly. That’s because it is controlled by a company that won’t hesitate to spy on you. Companies tend to lose their scruples when that is profitable. By contrast, free (libre) software is controlled by its users. That user community keeps the software honest.
This is pretty much why I use only software libre. I can’t write it all myself, but I have more trust in groups that don’t hold profit as a motive when I entrust to them my data. These non-profit companies develop software that allows me to see and manipulate the source code. I can do anything I want with it, except close it up.