Commercial use of Gliffy diagrams unclear
Working with Gliffy on commercial goals is somewhat problematic due to Gliffy's EULA being unclear as to the use of the software in commercial activities. The comments in the reviews for Gliffy cast doubt as to whether it is possible to use Gliffy for commercial purposes and the official responses from Gliffy do nothing to suggest otherwise. You may want to rethink whether Gliffy is the right choice if you are a commercial entity.
Documentation from the Atlassian Marketplace
Source: https://marketplace.atlassian.com/plugins/com.gliffy.integration.confluence/cloud/reviews