Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application. Developed by University of Strasbourg (France), plus many others.
License: Open Source
Jitsi is an open-source video conferencing tool that provides extensive features, strong security options, and high customization, making it suitable for large meetings and organizations. In contrast, appear.in offers a more user-friendly experience with features like virtual backgrounds and meeting scheduling, making it ideal for casual meetings and small teams.