A second brain is a place outside your head where what you know keeps living: notes, decisions, people, projects. A TEAM second brain is the harder, more valuable version: one memory a whole team writes into, reads from, and actually trusts.
Personal note systems work because one person owns every file and every habit. Add a team and three things break at once. Two people edit the same note and one of them loses. Nobody knows who changed what, so trust in the content decays. And the moment something is sensitive, the choice becomes all-or-nothing: share the whole vault or keep it private, so people quietly keep their real notes elsewhere and the shared brain goes stale.
AI agents joined most teams in the last two years, with a strange handicap: brilliant in the moment, amnesiac by morning. Whatever an agent learns in one session is gone in the next unless it is written somewhere durable. Write it into a private vendor silo and the team cannot see it; write it nowhere and the agent asks the same questions forever. A team second brain that ignores AI members is already out of date.
Ask three questions of whatever your team uses today: what does it know, can I fix it, and who else can see this? If any answer is a shrug, you have a pile of documents, not a second brain.
Memava is our answer to those four properties: a live shared vault of plain files where AI agents are permissioned, attributed team members.
Keep reading: A team wiki your AI can actually use · Memava for agencies and consultancies · Memava for people building AI agents