Other features I look at include the number of participants allowed on a call and the number of video feeds allowed simultaneously. The most generous is Adobe Connect, which is unlimited, but some offer as few as four participants at a time. Consider how important this is to your company. Most services let you record meetings, and a few let you edit the recording right within the software. These recorded meetings can then be used for your records or as webinars for anyone who missed the meeting or for new employees.
For presentations, screen sharing is important as are granular options such as the ability to share just one application (Microsoft PowerPoint, for example), document, or image or share your entire desktop. Most of the video conferencing services in this roundup also offer a whiteboard tool, which you can use to sketch out ideas or take notes during the meeting for everyone to see. You also need to consider what the participants are able to do, such as share their screen, enable their webcam, sketch on a shared whiteboard, and even take over the presentation. Think about how much actual collaboration you'd like in your meetings.
Signal Private Messenger is one of the most popular privacy chat apps. It features end-to-end encryption for all messages, voice calls, and video chats between two Signal users. It focuses a lot on individual chats. There are group chat features, but it's mostly for personal use. This is one of the biggest differences between it and rival privacy chat app Telegram. Video calls worked fine in our testing so we have no trouble recommending them. It's a neat way to get some encrypted chats as well. The app is also completely free and open source. You can't really go wrong with it, but there are better video chat apps if you need group video chats.