HEY is an email and calendar service made by 37signals, the company behind Basecamp. It replaces a mailbox such as Gmail or Outlook with its own apps for the web, Mac, Windows, Linux, iOS and Android.
The first email from a new sender goes to The Screener, where the user accepts or rejects that sender; rejected senders are not shown again. Accepted mail is sorted into three places: the Imbox for important mail, The Feed for newsletters, shown as a scrollable page with every message already open, and the Paper Trail for receipts and order confirmations. HEY blocks spy pixels (tiny hidden images that report when a message was opened) and includes a calendar and 100GB of storage. HEY for Domains adds sending from a company's own domain, several users, shared threads, private team comments and aliases such as support@ that reach several people.
HEY is a subscription service with no advertising: a personal plan with a @hey.com address billed once a year, and a per-user monthly plan for custom domains.