The best replacement for golang is scala.

The best alternatives to golang are rated as following:
★★★★★  scala
★★★★  rust
★★★★  erlang
★★★  clojure
★  node js
★  julia
  node.js

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

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



Google Trends

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golang
scala
rust