HAAst sits between the OS and Asterisk, while the configuration generator (the pretty GUI that creates config files) sits above Asterisk. For that reason HAAst is compatible with a wide range of configuration generators.
One noteworthy difference between configuration generators is the database they use to hold their configuration data. While HAAst can sync many different database management systems, from our experience MySQL is most popular in critical/commercial implementations of Asterisk.
The demand for supporting other database is so low that we have already begun deprecating support for other databases. If you are purchasing a large number of licenses (e.g. under the OEM or ITSP program) we are happy to re-institute support for a particular database – but please contact our sales or support group to discuss your needs.
If you aren’t sure which configuration generator is right for you, have a look at some feedback from customers: Configuration Generator Comparison