The best replacement for cockatiels is parakeets.

The best alternatives to cockatiels are rated as following:
★★★★★  parakeets
★★★★  lovebirds
★★★  budgies
★★  cockatoos
★  conures
  budgies better
  parrotlets
  sun conures

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

Other search terms related to cockatiels and their ratings are:
★★★★★ parakeets
★★★★ other birds
★★★★ budgies
★★ finches
★ lovebirds
love birds
You have in mind a companion for cockatiels and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cockatiels in all years. Click on graph for more.
cockatiels
parakeets
lovebirds