Both Go and Elixir are solid picks. Go's concurrency model with goroutines and channels is a breeze to work with and is great for squeezing out a lot of perform

Both Go and Elixir are solid picks. Go's concurrency model with goroutines and channels is a breeze to work with and is great for squeezing out a lot of performance. Cross-compiling to different platforms is straightforward, too. Elixir, on the other hand, is a champ at handling many concurrent connections with low overhead, thanks to its Actor Model. If your utility needs to be resilient and fault-tolerant, the BEAM (Erlang VM) could really shine.(check out the burrito or bakeware elixir libs.) I'd say, give both a shot with a small prototype. You can't really go wrong, they're both solid for concurrent programming. If you're also thinking about going down the rabbit hole of systems programming languages, Rust might be a worthy contender. It's not as easy to pick up, but the performance and memory safety it offers are top-notch.