Wiki and forum are both popular tools for online communication. The main difference between a wiki and a forum is that a wiki is a collaborative editing platform for creating and sharing content, while a forum is a discussion space for sharing opinions, views, and experiences. A wiki allows multiple users to edit a single page, while a forum is typically composed of several separate threads. Wikis are often used for creating knowledge bases, while forums are generally used for discussion. Wikis are more suited for the dissemination of research, while forums are more suitable for casual conversations.