An Open Source XMPP Client Library written in Java for JVMs and Android
Pull request Compare This branch is even with igniterealtime:master.
Failed to load latest commit information.
config Add checkstyle rule for StringBuilder.append(char) Jul 27, 2015
documentation Add XEP-0191 - Blocking Command implementation Aug 31, 2016
resources Merge tag '4.1.8' Jul 30, 2016
smack-android-extensions Merge tag '4.1.2' Jun 27, 2015
smack-android Add Android jar to classpath Apr 12, 2016
smack-bosh SASL Proxy Auth support Sep 21, 2015
smack-compression-jzlib Add JavadocPackage checkstyle Apr 4, 2015
smack-core Use 24h timestamp in debuggers. Oct 20, 2016
smack-debug-slf4j Fix 'test' dependencies Feb 10, 2016
smack-debug Use 24h timestamp in debuggers. Oct 20, 2016
smack-experimental Add XEP-0191 - Blocking Command implementation Aug 31, 2016
smack-extensions Improve "Invalid affiliation" exception message Oct 3, 2016
smack-im Fix typo and add URL to Roster javadoc Oct 3, 2016
smack-integration-test Rework Roster's SubscribeListener Jul 31, 2016
smack-java7 Add errorprone check and fix found errors Sep 13, 2015
smack-jingle-old Fix 'test' dependencies Feb 10, 2016
smack-legacy Improve MUC code and documentation Aug 3, 2016
smack-repl Add (partial) support for IoT XEPs Jul 21, 2016
smack-resolver-dnsjava Add JavadocPackage checkstyle Apr 4, 2015
smack-resolver-javax Add JavadocPackage checkstyle Apr 4, 2015
smack-resolver-minidns Merge tag '4.1.7' Apr 14, 2016
smack-sasl-javax Fix 'test' dependencies Feb 10, 2016
smack-sasl-provided Fix 'test' dependencies Feb 10, 2016
smack-tcp Do not re-use the Socket after connect() failed Jun 21, 2016
.gitignore Re-implementing the vCard provider using a pull parser. Extended unit… Feb 9, 2015
.travis.yml travis.yml: Add --stacktrace to 'gradle check' Aug 29, 2016
LICENSE Add LICENSE Dec 27, 2014 README: Add #smack IRC badge from kiwiirc Jan 15, 2016
build.gradle build.gradle: Record branch in version string Jun 21, 2016 Add JavadocPackage checkstyle Apr 4, 2015
repl repl: cd into PROJECT_ROOT Jun 9, 2016
settings.gradle Add a REPL for Smack (smack-repl) Feb 10, 2016
version.gradle Smack 4.2.0-beta3-SNAPSHOT Jul 30, 2016


Build Status Coverage Status Project Stats Flattr this git repo Visit our IRC channel

Instructions how to use Smack in your Java or Android project are provided in the Smack 4.1 Readme and Upgrade Guide.


Smack is an open source, cross-platform, easy to use, Java XMPP client library.

A pure Java library, it can be embedded into your applications to create anything from a full XMPP client to simple XMPP integrations such as sending notification messages and presence-enabling devices. Smack and XMPP allows you to easily exchange data, in various ways e.g. fire-and-forget, publish-subscribe, between human and non-human endpoints.

Confused? Have a look at the Overview.

Smack - an Ignite Realtime community project.

Bug Reporting

Only a few users have access for for filling bugs in the tracker. New users should:

  1. Read "How to ask for help or report an issue"
  2. Create a forums account (only e-mail is a requirement, you can skip all the other fields).
  3. Login to the forum account
  4. Press New in your toolbar and choose Discussion
  5. Choose the Smack Developers Forum of Smack and add the tag 'bug_report' to your new post

Please search for your issues in the bug tracker before reporting.


The developers hang around in #smack (freenode, IRC) and (XMPP MUC room). Remember that it may take some time (~hours) to get a response.

You can also reach us via the Smack Users Forum if you have questions or need support, or the Smack Developers Forum if you want to discuss Smack development.


If you want to start developing for Smack and eventually contribute code back, then please have a look at the Guidelines for Smack Developers and Contributors. The guidelines also contain development quickstart instructions.



If you find Smack useful and feel like donating, then you can use one of the following systems:

Ignite Realtime

Ignite Realtime is an Open Source community composed of end-users and developers around the world who are interested in applying innovative, open-standards-based Real Time Collaboration to their businesses and organizations. We're aimed at disrupting proprietary, non-open standards-based systems and invite you to participate in what's already one of the biggest and most active Open Source communities.