When comparing Ambassador vs The Lounge, the Slant community recommends The Lounge for most people. In the question“What are the best IRC clients for Windows?” The Lounge is ranked 18th while Ambassador is ranked 27th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Wrapping IRC client inside web browser provides natural workflow
So much of the purpose for any interpersonal communication is wrapped up in exchanging knowledge and sharing experiences with IRC being no different. The modern era has taken us to a place where a large portion of what we want to share and exchange with others are things which require the internet and a web browser, so when links are inevitably traded on IRC, the ability to interact with them natively in another tab of the same application has become one of the most productive ways to use IRC.
Pro Free
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
Always up.
Cons
Con Server, not an application
This is a server, not an application, so there's that extra bit of overhead.
Con Uses NodeJS
Javascript...