I was looking at Zoho earlier and I think they present themselves well. The ones I've heard most about are Fastmail and Protonmail, especially on HN.

One of the good things I've read about Fastmail and Protonmail is they are incredibly reliable and privacy conscious. Likewise, they seem to focus primarily on email as opposed to Zoho which seems to offer a variety of services aimed at businesses. I wonder if the email service offered by Zoho for private email users holds up to that offered by Fastmail and Protonmail?