This presentation showcases the default functionality offered by three popular open source IR software platforms; DSpace, Hyrax and InvenioRDM when ingesting and publishing typical content. Although each platform is configurable, they come with default metadata schemas and design decisions that drive the ability to personalize the application. Various aspects of these basic use cases will be discussed, as well as the effort needed to implement light thematic branding. Support for more advanced features such as PIDs, single sign-on, full-text indexing, faceted search and browsing, support for publishing workflows, integrations with external services to enhance the functionality and interoperability will be very briefly touched upon for the sake of brevity.