I think it's time to create comparison p3chat.com vs Zopim
We are trying P3chat now. Good solution for our sales goals!
P3chat widget has increased my income, I will provide numbers later after 3 months period calculation but now it's about 34% rise.
I will give P3chat 9/10 and I hope they take one more point soon :)
Best Live Chat Software, You can use Heybubble technology and/or Skype , Jaber etc...
Excellent service with low prices!