For anyone recommending Zopim, I recommend you to read about this nice little proof of concept that allows me or anyone to impersonate anyone in your live chat. So you probably should not use it for private area chats or anything remotely significant.
PS, most of the live chat widgets suffer from this issue. Perhaps something to be addressed...
I am using LiveAdmins Live chat solution on my website last 3 years. The reason behind to chose this compnay live chat solution they also provide live chat service along with chat software in very reasonable price. There are lots of live chat solution in market you can chose any of software that fulfill your requirements.
We are using crisp.im and finding it pretty great for several reasons:
1. The free option gives you upto 2 operators (most others give only 1)
2. The mobile works pretty well, so you can provide support when you are on the road
3. The dashboard is clean and clear
4. The paid option has several cool features if you later want to pay for it
Have you tried tawk.to ? It was fairly easy to set up and the app gives real time notifications. You can see its usage at www.reportsworldwide.com