Based on our record, OpenMeetings seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Another option: https://openmeetings.apache.org/. - Source: Hacker News / 9 months ago
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
BigBlueButton - Engage Your Online Students. BigBlueButton is a web conferencing system designed for online learning.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing
Slack - A messaging app for teams who see through the Earth!