macOS / binaries /

suggestd

/System/Library/PrivateFrameworks/CoreSuggestions.framework/Versions/A/Support/suggestd
Daemon that processes user content in order to detect contacts, events, named entities, etc

The suggestd daemon receives content from Spotlight, Mail, Messages and various other apps in order to power various features. Those features include Found in Apps, Proactive QuickType, and Keyboard/Siri/News Personalization.

The binary is a part of CoreSuggestions private framework.

source: man