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I'm only passingly familiar with either, but it seems like most of what ZeroMQ offers is already built into Erlang, yet there's an Erlang-ZeroMQ binding that's fairly active according to its github page. What am I missing?

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Suppose you wanted to use Erlang to talk to a system that already uses ZeroMQ... – Greg Hewgill Apr 4 '13 at 23:20
up vote 4 down vote accepted

ZeroMQ bindings are available for a lot of programming languages, not just Erlang; this is one of the library's great strengths.

Erlang's built-in mechanisms are probably great as long as everything uses Erlang, but I doubt they are in any way compatible with other languages' native networking mechanisms.

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Perhaps communication with a ZeroMQ bound but non Erlang process.

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