The best replacement for grunt is wrex.

The best alternatives to grunt are rated as following:
★★★★★  wrex
★★★★  gulp
★★★  bower
★★★  yeoman
★★★  pog
★★★  rachni queen
★★★  dogface
★★  grunt-cli
★★  make
★★  guard
★★  gradle
★★  brunch
★★  codekit
★★  maven
★  rattle
★  requirejs
★  cobbler
★  ant
★  bleat
★  compass
★  grunt
★  garrus
★  makefile
  footmen
  spyro
  doughboy
  slump
  rachni
  mordin
  mimosa

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

Other search terms related to grunt and their ratings are:
★★★★★ sass
★★★★★ bower
★★★★ compass
★★★ jasmine
★★★ less
★★ jenkins
★★ requirejs
★ jekyll
★ deer call
★ karma
You have in mind a companion for grunt and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of grunt in all years. Click on graph for more.
grunt
wrex
gulp