[ap46]

Appear.in or even something simple built with WebRTC on a heroku dyno or Firebase for signalling would get the work done for free.

[forvelin]

You can use this argument for almost any SaaS and it simply does not make a sense.

They have competitors but maybe they are better with marketing, fault tolerance and so forth ? Considering conferencing takes time, free might get more expensive.

[lucasverra]

always had bad results for appear.in while conferencing (1to1 works ok)

[lima]

Jitsi Meet :)