What are some alternatives?
Olark - Real-time chat and monitoring of your website visitors through Google Talk and Jabber.
LiveAgent - LiveAgent is a fully-featured web-based live chat and helpdesk software. It harnesses the power of a universal inbox, real-time live chat, built-in call center, and a robust customer service portal. Start you free 14-day trial today.
Zopim - Live chat is a faster and more personal way for you to engage your customers. Free for 14 days. No credit card required.
Zoho Desk - Industry's first context-aware Helpdesk Software
LiveZilla - LiveZilla Live Support Software featuring Live Chats, Real Time Visitor Monitoring, Online Customer Support, Ticket System, WebCam Chats and Operator to Operator Chats.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community