https://techcrunch.com/2019/04/05/skype-now-supports-up-to-50-group-call-participants-topping-rivals/

Skype is capitalizing on Apple’s struggles with Group FaceTime to attract attention to its own group calling features. Today, the company announced it’s doubling the number of people who can simultaneously participate in a group audio or video call. It now supports as many as 50 people at once, up from 25, previously.

With the expanded support for more participants, Skype tops the abilities of other popular messaging apps like WhatsApp, Google Hangouts and Instagram, and instead competes more directly with enterprise-grade calling solutions like Zoom, for example, which supports up to 100 or even 1,000 participants.