Kindly help with my following queries.
1. Give Jive’s focus on cloud I doubt that on-premise is an option for Chime. Take a look at HipChat if you are interested in an on-premise product (probably a bit more mature as well)
2. See number 1. I’d say probably not at this time but that is at least more possible.
Chat apps seem to be the new Hello World of programming (slightly better than all the to-do list apps I suppose :-p)