Our company has used virtual actor framework called Orleans that is for C#/.Net Framework. There are clones of it in Erlang https://github.com/erleans/erleans and Elixir https://github.com/CrowdHailer/pachyderm
Today I stumbled on a runtime that allows you to build virtual actors with basically any language, Elixir included, it’s called Dapr https://dapr.io .
It’s not yet 1.0 but it’s repository is here https://github.com/dapr/dapr and announcement can be found here https://cloudblogs.microsoft.com/opensource/2019/10/16/announcing-dapr-open-source-project-build-microservice-applications/