I’m a little unclear about the licensing for Axon Server.
In a recent post (Axon 4 Future), Steven van Beelen said
Additionally, note that Axon Server also has an open-source implementation (albeit with some limitations).
The Axon product overview also says
The programming model is provided by the popular Axon Framework while Axon Server is the infrastructure part of Axon, all open sourced.
While I understand there are two editions (Standard and Enterprise), I’m not able to find the source code for Axon Server anywhere, even for Standard features.