The best replacement for frsky is spektrum.

The best alternatives to frsky are rated as following:
★★★★★  spektrum
★★★★  orangerx
★★★  turnigy
★★★  flysky
★★★  dragon link
★★  dsmx
★★  fasst
★  dsm2

Your alternative for frsky is not listed? Suggest!
Speaking about frsky, one probably shouldn't forget about 9xr.

Other search terms related to frsky and their ratings are:
★★★★★ 9xr
You have in mind a companion for frsky and it is not yet here? Propose!



Google Trends

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frsky
spektrum
orangerx