[pjc50]

Yes, but the choice has to be made to use email rather than Facebook, iMessage, LinkedIn, etc. For some people it's the default, but there is always advertising trying to tempt them away. Email doesn't really have a brand identity.

Note how easily email converges on big email providers too, rather than everyone running their own services. Gmail is definitely a brand. Lo and behold, Gmail is a service that is "free" but paid for by selling analysis of the content of your emails.

[adsr]

Yes, Gmail is definitely a brand but I don't need to have a Gmail account to send an email to someone who does.