A consultancy is a professional practice that provides expert advice in a particular field or subject.

Effective altruism organizations are often constrained by the difficulty of accessing talented specialists when their needs fluctuate too rapidly to justify a new hire. Effective altruism consultancies have been proposed as a partial solution to this problem.^[1] People capable of doing temporary work for a variety of organizations could be permanently employed by such consultancies. Possible examples of effective altruism consultancies include Rethink Priorities, Berkeley Existential Risk Initiative and Good Growth.