Partner Ecosystem Management (PEM) platforms facilitate co-selling and ecosystem collaboration between technology partners — enabling account mapping, deal sharing, mutual introductions, and joint pipeline building across partner networks. Core capabilities include account mapping (overlapping customer/prospect lists), co-sell opportunity management, partner matching and introduction workflows, ecosystem analytics and attribution, and integration with CRM and PRM systems. The category spans ecosystem collaboration platforms (Crossbeam, Reveal, PartnerTap) and co-sell features within broader partnership suites.