Hello, Is it possible to release a library without its source code? Only the public interfaces should be open. Also, It’s a business constraint I can’t control :slight_smile:

Technically yes, you can compile with --no-debug-info and distribute .beam files (or use encrypted debug info, see Erlang compiler doc). As expected from a bytecode language it’s not very difficult to reverse engineer though, and it might take some trickery to make it work with Mix and Hex.