EBSCOhost Passport is available for free as a Chrome extension or Microsoft Edge addon. It uses DOIs to connect to resources and will direct users to your EBSCOhost full text resources and open access resources, so your library can test its features now and compare it with LibKey. The Passport extension would need access to all of your holdings through Full Text Finder in order to link to your resources with content providers other than EBSCO. LibKey features you may want to include in your comparison include enhanced EBSCO linking and direct linking to full text.