ConverseJS mostly focuses on Chat, Movim is also doing social features (checkout the website for more info https://movim.eu/ https://movim.eu/) such as publicat

ConverseJS mostly focuses on Chat, Movim is also doing social features (checkout the website for more info https://movim.eu/ https://movim.eu/) such as publications, comments, sharing… There's also video-conferencing support. But the biggest difference is that Movim is a "light-client", most of the work is done server side, the browser is just showing the result, you can reload the page, close the tab and come back 1h after the session will stay open.