Each cell is a live account count between one of your populations and one of theirs.
See every shared account instantly
The overlap matrix is the first thing a partnership manager opens: every population on your side, laid against every population on theirs, computed straight from both connected CRMs.
Populations, and who sees what
Group accounts into populations, then set a visibility level for each population, for each partner, independently. One partner can see overlapping accounts by name; another sees counts only, until you decide otherwise.
Three shapes of overlap, one matrix
A partnership manager runs into all three of these most weeks. The matrix surfaces them the moment they exist, not at the next quarterly sync.
Both sides already sell this account. The matrix flags it so neither team walks into the same conversation twice.
One side already has the account, the other is still chasing it. The matrix is where that conversation starts.
Both sides have an open deal on the same account at the same time, surfaced before either rep finds out on a call.
The matrix updates the moment any connected CRM changes. Nobody has to ask for a refreshed spreadsheet.