The best replacement for cockatiel is parakeet.

The best alternatives to cockatiel are rated as following:
★★★★★  parakeet
★★★★  lovebird
★★★★  budgie
★★★  cockatoo
★★★  conure
★★★  parrotlet
★★  green cheek conure
★★  quaker
★  quaker parrot
★  parrot
★  african grey
★  canary
★  parakeet pet
  indian ringneck
  sun conure
  lorikeet
  parakeet which is better
  budgerigar
  parrots
  male cockatiel

Your alternative for cockatiel is not listed? Suggest!
Speaking about cockatiel, one probably shouldn't forget about budgie.

Other search terms related to cockatiel and their ratings are:
★★★★★ budgie
★★★ lovebird
You have in mind a companion for cockatiel and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cockatiel in all years. Click on graph for more.
cockatiel
parakeet
lovebird