Google is everywhere and their services are often the best and on top of that usually free. But do not forget that if you don't pay then you are the goods being sold! So, first thing would be Gmail.
I happened to stumble upon my new email providor as I was looking at a Fairphone in Berlin. You can come and touch and feel a Fairphone at the Posteo facilities in the old Schultheiss brewery. So I went there and started chatting with the pleasant woman standing there and it turns out they are an email provider, all green and aware. They are private, never save more data than needed on their servers (which also saves energy) and they give their employees an organic and vegetarian lunch every day as well as extra days off so they can take the train instead of flying! Brilliant! All this at the cost of one euro a month.
So, privacy and green thinking aside, another major reason to support them is that the company has no debt. It is also not a shareholding company. Remember that debt is the basis of capitalism and the reason the poor just get poorer while the fat cats just get fatter. The money they have (you pay in advance as a customer) are saved in the GLS Bank that does not finance dirty business.