When comparing Jitsi vs Riot, the Slant community recommends Riot for most people. In the question“What are the best Skype alternatives?” Riot is ranked 5th while Jitsi is ranked 22nd.
Ranked in these QuestionsQuestion Ranking
Pro Supports SIP accounts
well implemented SIP SIMPLE (texting), SIP presence, XCAP.
Pro OMEMO encryption without plugin
Secure Jabber Texting, better than legacy sms texting.
Pro supports XEP-0016, Privacy Lists
Jabber Texting apps without Privacy Lists are WOEFULLY deficient
Pro Video calls
Pro Encryption out of the box
Encryption for chat, desktop sharing, and web confrencing available.
Pro Cross platform
Mac, Windows & Linux availability.
Project available on github for anyone to contribute to or use.
Pro Web and mobile (iOS, Android) versions available
Pro Supports text, voice, video
Integrates with Jitsi for multi-party video chats
Pro Uses Matrix, the open communications protocol
Pro Very good and simple interface
Riot has a very simple interface, adding the ability for more unexperienced PC-Users to use it.
Pro Widgets support
Want to watch that flick at YouTube and discuss it at the same time? Have Grafana graphs stacked above your DevOps team chat? Collaboratively edit Google Docs and chat over without switching applications? This is possible with Riot.
Pro Bridges to other networks
You're not confined within Riot's or even Matrix garden, and you don't have to make users of other networks switch to Matrix.
Con Abandoned android development
They switched focus to Jitsi Meet client for android.
Con Uses Java
Not a native app, takes awhile to load.
Con Gui not as slick or streamlined as competitors
Con Still in active yet early development
There is clearly a User Experience issue esp. in web version which the developers are aware of and are working hard to improve. They've got the concept concrete, so UX won't be an issue in no time. Most often used parts are functional, but some are yet not.
The success of riot depends on how fast the development is, or it'll get outdated too quickly as developers of Signal and Telegram have predicted.