Weavay

Weavay is an email client that stops treating messages as isolated items. Every message becomes a node in a graph of the people, threads and documents it touches, so the context around a conversation is there without digging for it.

You pull that context in with @-mentions, and rules sort mail on the way in without any model involved. The AI features sit on a separate tier and stay source-linked, so nothing is asserted without something to point at.