The best replacement for vsco is replichrome.

The best alternatives to vsco are rated as following:
★★★★★  replichrome
★★★★  afterlight
★★★★  dxo
★★★★  snapseed
★★★  nik
★★★  faded
★★★  exposure
★★★  mastin
★★  totally rad
★★  camera+
★★  dxo filmpack
★★  silver efex
★  red leaf
★  alien skin exposure
★  nik software
  red leaf presets
  mastin labs
  alien skin

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

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



Google Trends

Scale is based on the average worldwide traffic of vsco in all years. Click on graph for more.
vsco
replichrome
afterlight