Other services might be able to have aliases that you set up in the account. But the advantage of the gmail service is that it's a virtual on the fly alias. You don't have to set up anything beforehand. The couple other services I use don't offer that.
@LurganIeUk : Telus owns all this content. You agreed to that upon using the community. No copyright.
Loosen up and get a sense of humour!!!