The nanomsg documentation (linked from the article) lists a number of fundamental differences between it and ZeroMQ. Some of them are implementation details, but there are quite a few fundamental design&#x2F;API changes that would be impossible to make in an existing library.<p><a href="http:&#x2F;&#x2F;nanomsg.org&#x2F;documentation-zeromq.html" rel="nofollow">http:&#x2F;&#x2F;nanomsg.org&#x2F;documentation-zeromq.html</a>