The best replacement for gfi is gfci.

The best alternatives to gfi are rated as following:
★★★★★  gfci
★★  surge protector
★★  afi
★★  gfci outlet
★  labtech
★  cobian
  n-able
  kaseya
  shavlik
  afci
  rightfax
  gfic
  gfci outlets
  gfep
  rcd
  non gfi
  arc fault

Your alternative for gfi is not listed? Suggest!
Speaking about gfi, one probably shouldn't forget about no ground.

Other search terms related to gfi and their ratings are:
★★★★★ no ground
★ circuit breaker
regular outlet
You have in mind a companion for gfi and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gfi in all years. Click on graph for more.
gfi
gfci
surge protector