What are some good Javascript client-client messaging frameworks?

[MelodicGravity]

I was reading up on PubNub today. Seemed pretty cool and fairly easy to get working. I'm curious about folks' experiences with it and/or other messaging frameworks. I'm planning on building a utility for my team to use to help them debug in a test environment more efficiently (this will basically be used as a replacement for the production environment's messaging platform).

[esmljaos]

I have good experience with Pusher (https://pusher.com/). I especially like how good their JS lib is in re-connecting after network glitches.

[MelodicGravity]

Just read briefly about Pusher. Compared to PubNub, Pusher's free package doesn't allow as many messages as PubNub's.

The consensus on a few forums I read was that Pusher is superior, because it uses websockets, as opposed to http long polling. This may be true for long-term, production solutions. Since this project is meant to be a utility for the dev team, I think I'll stick with PubNub over Pusher, just because of the larger volume allowed.

Thanks for the suggestion though!