What alternatives to consulting marketplaces exist?
Four workable alternatives come into question: (1) Your own supplier list — works for stable requirements with established partners, but scales poorly across changing topics. (2) Purchasing cooperatives — a shared pool across group entities, with little flexibility. (3) General-contractor platforms — an external network with a simple contracting route. (4) Strategic consultant selection via procurement advisory — appropriate for large mandates, high effort for small requirements.