Notion killing Skiff-influenced email app since most users use AI agents instead

In February 2024, Notion bought Skiff , an encrypted email and productivity software startup. Within a year, Notion shut down Skiff’s email service (taking @skiff.com email addresses with it). And in April 2025, the San Francisco-based company released Notion Mail, a Gmail client primarily built by people who joined Notion through the Skiff acquisition.