The best replacement for thirsties is bummis.

The best alternatives to thirsties are rated as following:
★★★★★  bummis
★★★★  bumgenius
★★★★  flip
★★★★  rumparooz
★★★★  fuzzibunz
★★★  alva
★★★  grovia
★★★  best bottom
★★  flip covers
★★  gdiapers
★★  charlie banana
★  kawaii
  bummis super brite
  econobum

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

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



Google Trends

Scale is based on the average worldwide traffic of thirsties in all years. Click on graph for more.
thirsties
bummis
bumgenius