Fastmail
Fast, reliable, privacy-respecting email and calendar. Australian company, GDPR-compliant, no ads. A premium alternative to Gmail for those who want email that works for them. It supports custom domains and standard IMAP, so leaving later does not mean losing the address or the archive.

Fastmail, as it opens in a browser tab.
Not sure how to add Fastmail to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
Own Fastmail? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.
How to install Fastmail as a PWA
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