I found this article and read a lot of Genstage and OTP in general and it seems that Elixir Agents could be a good fit for your requirement especially if you have a lot of concurrency.
Check this article for more info and clarity https://medium.com/scientific-breakthrough-of-the-afternoon/elixir-agent-vs-genserver-ef443aa4a441
Also this Comparing Elixir and Go
