When comparing Kiwi IRC vs The Lounge, the Slant community recommends The Lounge for most people. In the question“What are the best web IRC clients?” The Lounge is ranked 2nd while Kiwi IRC is ranked 3rd.
Ranked in these QuestionsQuestion Ranking
Pro Beautiful interface
Kiwi's default interface is aesthetically modern, while keeping a classic two-column layout with chat window on the left and nicklist on the right. Unlike many other interfaces, a considerable amount of effort has been spent on making it easy on the eyes.
The interface offers common customization options including time format changes, choice of system messages and choice of laying out channels in a tabbed or list manner.
Pro Free and open source
Kiwi IRC web client is available for free licensed under GPL with source available on GitHub.
Code can be generated that allows embedding the IRC client within a website.
Pro Available in multiple languages
Kiwi's front-end is available in more than 20 languages including Polish, Romanian and Russian.
Pro Highly maintained
You can see the activity here. For example 62 pull requests were merged from 2018-02-17 to 2018-02-24.
Pro Hosted on the web
Con Notifications don't time out
Notifications pop-ups have to be closed manually each time, they don't disappear on their own after a set amount of time.
Con requires additional instal.. i.e. 'must have this' to run
Con Server, not an application
This is a server, not an application, so there's that extra bit of overhead.
Con Uses NodeJS