The following sections provide information about legal aspects related to


The source code is licensed under the GNU AGPL 3.0. You can find a copy of the license in the repository here and references to this license at the top of each source code file.

All rights to the source code remain exclusively with Technologies GmbH. All (external) contributors sign a Contributor Assignement Agreement

The application templates and instances of code generated from these templates are licensed under the BSD 2-clause license.


In some jurisdictions, the APIs implemented by may be protected by copyright.

In regards to WAMP and the WAMP meta-API, these are covered by the respective licenses provided by the WAMP project.

In regard to other program APIs, we provide a license.

WAMP clients as separate works

We see any code which connects to via WAMP as a separate work. The license (the AGPL v3) does not apply to WAMP clients. This applies irrespective of where these run, i.e. also to components which are run side-by-side within an native worker of type router, which are run in a native worker of type container or in a guest worker. We promise to stand by this view of the license. If you need further assurance, you can email us at for a signed letter asserting the above promise.

We release all our client libraries (those provided by the Autobahn project under non-copyleft licenses, which allow their use for closed-source & commercial software. For other client libraries see their respective licenses (these appear to be universally non-copyleft as well).

Templates is able to generate applications from application templates. The code for application templates within this folder (and folders beneath) is licensed under the BSD 2-clause open-source license or the Apache 2.0 license.

The same licenses applie to the code generated from the application templates. E.g., when you do

crossbar init --template hello:python --appdir $HOME/hello will generate a new WAMP application in the $HOME/hello directory from the application template in hello/python. All files generated in $HOME/hello are licensed under above licenses.

The licenses allow you to use the template code and generated code in your own applications, including closed-source and commercial applications.


The documentation is licensed under a Creative Commons license: the CC BY-SA 3.0.


"WAMP" and "" are trademarks of Technologies GmbH.

The symbol

and the logo

and the extended logo

are design marks of Technologies GmbH.

All rights to above trademarks remain with Technologies GmbH and any use of these requires prior written agreement by Technologies GmbH.