The best replacement for edger is trimmer.

The best alternatives to edger are rated as following:
★★★★★  trimmer
★★  line trimmer
★★  weed eater
★★  string trimmer
★  deseq
★  electric edger
★  whipper snipper
★  walk behind
  deseq 2
  weedeater
  walk behind edger
  cuffdiff
  craftsman lawn edger
  lawn edger
  push edger

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

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



Google Trends

Scale is based on the average worldwide traffic of edger in all years. Click on graph for more.
edger
trimmer
line trimmer