No, not as a rule — and this is one of the most consequential myths in parrot keeping, because acting on it casually commits you to a second highly intelligent bird for decades. An African grey's need is for company and stimulation, and people can meet that need fully. Many single greys, given committed owners, are contented, talkative and closely bonded to their households. The question is never really 'bird or no bird' — it is whether this particular grey's social life is rich enough, and whose company it actually wants.
Why a second grey is no guarantee
Greys are individuals with strong preferences, and they did not read the advice columns. Two greys may settle into easy companionship, calling and answering across the room. They may also ignore each other completely, compete jealously for the owner's attention, or actively clash — and with birds that have powerful beaks, clashes are not trivial. You cannot audition compatibility in advance, and the bird you bring home cannot be returned like a mismatched appliance without real cost to it. The safe assumption before buying a companion is the pessimistic one: plan for two birds that need separate cages, separate play stands, separate out-of-cage sessions and two full shares of your time. If they become friends, that is a bonus, not the plan.
When another bird genuinely helps
There are situations where a second bird earns its place. A grey whose owners work long, synchronised hours may settle better with avian company in the house, even if the two never share a cage. A bird that watches other birds with obvious interest at the rescue or the breeder's — calling, approaching, relaxed — is telling you something worth listening to. Same-species company suits greys best when it happens, since their communication styles match, though a grey's closest companion in many homes turns out to be a bird of a different species kept safely in its own cage nearby. In every case, the new bird comes home through quarantine: weeks in a separate room, a vet check, and introductions done at the birds' pace through bars before any shared space.
The cost nobody should skip over
Two greys means roughly double the food, double the cage cleaning, double the vet bills and double the daily attention requirement — and if the birds dislike each other, it can mean more than double the work, not less. It also means your bond with the first bird may change; some greys transfer part of their attachment to the newcomer, which owners sometimes experience as a loss. None of this argues against a second bird. It argues for choosing one the way you chose the first: deliberately. And if the right second grey is an older bird being rehomed, KinsLe's Transferrable Profiles bring its medical history, diet and known likes across from its previous owner, so a choosy bird's hard-won routines survive the move.