Social life
Budgies need daily company of some kind.
Updated
Bird guides
Budgies are social birds. A single budgie can do well if it gets steady daily attention, training, enrichment, and time near people, but many budgies are happier with a compatible budgie companion. Do not use a mirror as a friend, and do not add a second bird unless you can manage two cages, quarantine, introductions, and the possibility that they may not get along.
The right answer depends on the bird, your schedule, and whether you can care for two birds properly, not just whether one budgie looks lonely.

Budgie Questions
Budgies are social birds. A single budgie can do well if it gets steady daily attention, training, enrichment, and time near people, but many budgies are happier with a compatible budgie companion. Do not use a mirror as a friend, and do not add a second bird unless you can manage two cages, quarantine, introductions, and the possibility that they may not get along.
Check budgie social needs, housing, diet, and handling.
Use the hub for nearby questions after this answer.
Use supplies after the care plan is clear, not before.
Pick gear that makes the daily routine easier to repeat.
Budgies need daily company of some kind.
You must provide steady attention.
Two birds may focus more on each other.
A second bird needs a health plan first.
Two birds need space, bowls, and escape distance.
A reflection is not a companion.
Budgies are flock animals, so social life matters. If you keep one budgie, you become a major part of that bird's day. If your schedule is thin, a compatible budgie companion may be kinder than expecting the bird to wait alone.
One budgie can be a good setup when the bird has daily interaction, short training, safe out-of-cage time, foraging, and a person who notices changes in mood, appetite, and sound.
Two compatible budgies can chatter, preen nearby, play, and feel safer together. They still need a roomy cage, separate resources, human care, and slow trust-building if you want handling.
Quarantine first, then use separate cages and gradual introductions. Do not drop a new budgie into the resident bird's cage and hope they sort it out.
A mirror is not a real companion. Some budgies ignore mirrors, but others guard them, court them, or become frustrated.
Yes, some can, but a single budgie needs real daily attention, enrichment, and monitoring. Being alone all day with little interaction is not a good plan.
Two compatible budgies can be better for social welfare, while one budgie may focus more on people. The better choice is the one you can care for well.
They may become less people-focused, but patient training can still build trust. The goal is a good life for the birds, not maximum dependence on people.
No, mirrors are not a good substitute for social time. They can create guarding, courtship, frustration, or confusion in some birds.
Use these after the care plan is clear. Match size and materials to the bird you actually keep.
Affiliate links: Furball Cove may earn from qualifying purchases at no extra cost to you.

Start with safe space, ventilation, bar spacing, and room for natural perches.

Separate clean food and water dishes that are easy to wash every day.

Turns part of the meal into a simple job instead of a full bowl of boredom.

Tracks food, weight, sleep, droppings, behavior, and vet questions in one place.