Who is currently the best email provider?

I'm a semi-frequent viewer of the Tek, and I constantly hear Logan and Wendell talk trash about Gmail. I'm curious on who the Tek Syndicate community's email provider of choice is these days.

From what I hear, ProtonMail.

As far as free options, I'm not sure.  I just set up my own through my domain.

Do you know how long it takes for them to respond to invitations?

I'm using Fastmail with my own domain and I love it.

It isn't free though but I don't mind paying for a quality service and all the customization I actually need AND use.

I dunno about mail server hosting but if you can set it up yourself and you need web access, RainLoop is a good web mail client. But then there's also MailPile which is safer, so I'm not sure what's the "best" at the moment.

I use the email my ISP provides then I use Mozilla Thunderbird to get all my mail.