Piazza is described as 'A Q&A platform for students and their instructors' and is an app in the Education & Reference category. There are five alternatives to Piazza for a variety of platforms, including Online / Web-based, Android, iPhone, Mac and Windows. The best alternative is Moodle, which is both free and Open Source. Other great apps like Piazza are Hypersay (Free Personal), Acadly (Free), Prulu (Free) and Glisser (Freemium).
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.
Moodle vs Piazza opinions
pros, cons and recent comments
ThunderFox Moodle is a learning management system, not a q-and-a platform. Moodle is meant for keeping track of assignments, turning in work, etc., while Piazza is meant for asking questions and getting answers
Hypersay is a platform for interactive presentations that massively increase engagement. Keep your audience engaged with polls, questions, private notes and live slide sharing. Store, enrich & deliver presentations from your cloud.
Acadly helps educators boost engagement inside and outside the classroom, and record attendance at the tap of a button. It is free for higher education, and saves students thousands of dollars per semester on expensive polling app subscriptions.