The best replacement for whisper is blackout.

The best alternatives to whisper are rated as following:
★★★★★  blackout
★★★★  stayfree
★★★★  secret
★★★  rrd
★★★  300 blackout
★★★  postsecret
★★  aquaclear
★★  silent cat
★★  ceres
★★  shout
★★  mixino
★  sofy
★  modess
★  black cleaver
★  300 aac blackout
★  kotex
★  always
★  rrdtool
  cfx
  biowheel
  whisper
  venice h2
  300 aac
  rws 34
  newport h2

Your alternative for whisper is not listed? Suggest!
Speaking about whisper, one probably shouldn't forget about second glance lyrics.

Other search terms related to whisper and their ratings are:
★★★★★ second glance lyrics
You have in mind a companion for whisper and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of whisper in all years. Click on graph for more.
whisper
blackout
stayfree