I’ve heard about it Actix. For it to compare with OTP, you’d presumably need a lot more tools for dealing with supervisor trees. For example if you customized the `try!` macro to "kill" an actix actor and let a supervisor restart it. That’d be more OTP like.
Also, you should take a big look at the Pony language if you haven’t yet. It’s much earlier days than Rust, but comes from people who know and love Erlang.