The best replacement for browserify is requirejs.

The best alternatives to browserify are rated as following:
★★★★★  requirejs
★★★★  bower
★★  webpack
  ender

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

Other search terms related to browserify and their ratings are:
★★★★★ bower
★★★★★ gulp
★★★ backbone
You have in mind a companion for browserify and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of browserify in all years. Click on graph for more.
browserify
requirejs
bower