The best replacement for phaser is flanger.

The best alternatives to phaser are rated as following:
★★★★★  flanger
★★  vibe
★★  blaster
★★  univibe
★★  chorus
★★  lightsaber
★★  disruptor
★  impactjs
★  pixi
★  phase shifter
★  createjs
★  uni vibe
★  wah
★  construct 2
  disruptor sto
  plasma sto
  flange
  antiproton
  wah pedal
  photon torpedo
  tremolo
  phase 90

Your alternative for phaser is not listed? Suggest!
Speaking about phaser, one probably shouldn't forget about tap tempo.

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



Google Trends

Scale is based on the average worldwide traffic of phaser in all years. Click on graph for more.
phaser
flanger
vibe