Perhaps less well known are open-source reporting companies like Actuate (sponsors/main developers of the top-level Eclipse BIRT project), Pentaho, JasperSoft.

Perhaps less well known are open-source reporting companies like Actuate (sponsors/main developers of the top-level Eclipse BIRT project), Pentaho, JasperSoft. Not sure about revenue models for others, but Actuate sells support for their open-source tools and offers proprietary add-ons for those that need to scale their deployments.