The best replacement for ssb is am.

The best alternatives to ssb are rated as following:
★★★★★  am
★★★  dsb
★★★  fm
★★  cb
★★  ssbm
★  cb radio
★  psasbr
★  sat phone
★  am cb
★  ham radio
  satellite phone
  cw

Your alternative for ssb is not listed? Suggest!
Speaking about ssb, one probably shouldn't forget about base station.

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



Google Trends

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ssb
am
dsb