A company brain is one shared memory of everything a company knows, its people, process, data, and know-how, that both humans and AI tools can read from. Heidi is a company brain: the Cortex holds the knowledge, and everything else works from it.
The idea in one line: your company already produces its most valuable asset every day, in meetings, tickets, docs, and chats, and then loses most of it. A company brain captures it, cleans it, and puts it to work.
What makes it a brain rather than an archive is behavior: it consolidates, it answers with sources, it forgets on command, and it gets smarter with every correction.