When comparing Adium vs Jitsi, the Slant community recommends Adium for most people. In the question“What are the best Jabber/XMPP clients for Mac OS X?” Adium is ranked 1st while Jitsi is ranked 3rd.
Ranked in these QuestionsQuestion Ranking
Pro Supports file transfers
Pro Open source
Pro Easy-to-use interface
Pro OTR encryption
Pro OMEMO encryption without plugin
Secure Jabber Texting, better than legacy sms texting.
Pro Supports SIP accounts
well implemented SIP SIMPLE (texting), SIP presence, XCAP.
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.
Con Appears to be abandoned
Not Gatekeeper-compatible, SSL cert expired, social media presence is ancient.
Con Lack of OMEMO encryption
the de facto standard for Jabber Texting [xmpp]
Con Release version has old OTR
The current release, version 126.96.36.199 only does OTR version 2, and version 3 has been out for a long time.
Con Lack of multi-resource message capability
No carbon copy, for example.
Con No antispam (built-in or by plugin)
It has no challenge-like antispam (such as seen on github.com/jesobreira/box-sentry plugin for pidgin).
Con Abandoned android development
They switched focus to Jitsi Meet client for android.
Con Uses Java
Not a native app, takes awhile to load.