The best replacement for borax is boric acid.

The best alternatives to borax are rated as following:
★★★★★  boric acid
★★★★  baking soda
★★★  washing soda
★★  oxiclean
★  boron
★  diatomaceous earth
★  comet
★  calgon
★  oxyclean
  borax
  cornstarch
  glue
  bon ami
  tsp
  liquid starch
  boraxo
  oxy clean
  boric acid powder
  boric
  sodium borate
  boraks
  soda ash

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

Other search terms related to borax and their ratings are:
★★★★★ glue
★★★ hcl
★★ he washers
★★ fleas
★ hydrogen peroxide for mange
★ laundry
★ sugar to kill ants
★ salt in making silly putty
polyvinyl alcohol
laundry detergent
hydrochloric acid
pva
slime
liquid detergent
glue recipe
water and glue
You have in mind a companion for borax and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of borax in all years. Click on graph for more.
borax
boric acid
baking soda