The best replacement for muay thai is boxing.

The best alternatives to muay thai are rated as following:
★★★★★  boxing
★★★★  karate
★★★  kung fu
★★★  taekwondo
★★★  kickboxing
★★★  bjj
★★  krav maga
★★  wing chun
★  jiu jitsu
★  mma
★  judo
★  capoeira
★  tae kwon do
★  pool party
  dragon fist
  jeet kune do
  acolyte lee sin
  aikido
  muay boran
  boxing for mma
  silat
  tkd
  wrestling
  western boxing
  san shou
  jujitsu
  kyokushin karate
  kempo
  taekwondo is better
  boxer
  kenpo
  brazilian jiu jitsu

Your alternative for muay thai is not listed? Suggest!
Speaking about muay thai, one probably shouldn't forget about judo.

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



Google Trends

Scale is based on the average worldwide traffic of muay thai in all years. Click on graph for more.
muay thai
boxing
karate