ZeroMQ core engine in C++, implements ZMTP/3.1

concurrency, libzmq, messaging, network, networking, pubsub, pushpull, stream, zeromq, zmq, zmtp
brew install zeromq



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The ZeroMQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products. ZeroMQ sockets provide an abstraction of asynchronous message queues, multiple messaging patterns, message filtering (subscriptions), seamless access to multiple transport protocols and more.

Building and installation


For Linux users, pre-built binary packages are available for most distributions. Note that DRAFT APIs can change at any time without warning, pick a STABLE build to avoid having them enabled.

Latest releases


OBS release stable OBS release draft


OBS release stable OBS release draft

Bleeding edge packages


OBS release stable OBS release draft


OBS release stable OBS release draft

Example: Debian 9 latest release, no DRAFT apis

echo "deb ./" >> /etc/apt/sources.list
wget -O- | sudo apt-key add
apt-get install libzmq3-dev


For OSX users, packages are available via brew.

brew install zeromq

Build from sources

To build from sources, see the INSTALL file included with the distribution.


Extensive documentation is provided with the distribution. Refer to doc/zmq.html, or "man zmq" after you have installed libzmq on your system.


Development mailing list: Announcements mailing list:

Git repository:

ZeroMQ developers can also be found on the IRC channel #zeromq, on the Freenode network (


The project license is specified in COPYING and COPYING.LESSER.

libzmq is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

As a special exception, the Contributors give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you must extend this exception to your version of the library.

libzmq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.