Adrenna is described as 'is transforming the way organizations approach training, education and learning by providing innovative solutions to K-12, Higher Ed, Corporate, Government, Healthcare, Union, and Associations worldwide' and is an website in the Education & Reference category. There are more than 25 alternatives to Adrenna, not only websites but also apps for a variety of platforms, including Windows, iPhone, Android and Mac. The best alternative is Moodle, which is both free and Open Source. Other great sites and apps similar to Adrenna are Open edX (Free, Open Source), Chamilo (Free, Open Source), Instructure Canvas (Free, Open Source) and CSSDesk (Free).
Moodle is an open source tool for creating online dynamic web sites for their students. To work, it needs to be installed on a web server somewhere, either on one of your own computers or one at a web hosting company.
Chamilo is an open-source (under GNU/GPL licensing) e-learning and content management system, aimed at improving access to education and knowledge globally. It is backed up by the Chamilo Association, an international ONG based in Europe.
Wyzed® is a platform designed to simplify employee training. Built for efficiency, business owners can easily deliver online training such as staff inductions, pre-hire questionaries, OH & S, and role specific training.
Cloud LMS for corporate e-learning and staff development. User Management, eLearning Environment, Assessment, Communication Tools & Knowledge Base in one solution. Rich RestAPI for easy integration with any enterprise tech stack.