PostGIS is an open-source project, and support is available from a number of sources.
Bugs are reported and managed in a ticket tracker. Please follow these steps:
SELECT version() || ' ' || postgis_full_version();
Please, do not use the ticket tracker to ask for help, use the users mailing list for that.
If you believe you have found a security issue, please send an email to security@postgis.net. Follow directions as noted in Security policies and procedures.
For users who require professional support, development and consulting services, consider contacting any of the following organizations, which have significantly contributed to the development of PostGIS:
Many more PostGIS Service providers can be found using the OSGeo Service Provider search tool.
In addition to commercial and bug squashing support, PostGIS also offers several avenues of free support:
Official chat room is the #postgis channel on the freenode network. #postgis using IRC enabled browser or Web Interfaces
The postgis-users mailing list is a supportive community forum to discuss issues, to learn new techniques, and to share your knowledge with other learners.
For software development questions use postgis-devel.