Features

• Open source
• One-time fee (1 license = 1 website with life time updates)
• 50 users can chat at one time (i.e. 10 operators and 40 visitors) [?]
• Cute skin (fully customizable)
• Chat logs, of course
  
• Very clean code
• Fast and lightweight
• More than one operators can reply the same user’s question
• Visitors can fill out contact form when all operators are offline
• “Email notifications” when new visitor is online (optional)
• SSL support. All your and visitor messages will be encrypted
• Tested with WordPress 4.2

Compare with LC
Chat X Live Chat

Price $24 $17
Speed Realtime 1-2 seconds delay
Chat logs Yes Yes
Contact form message history Yes No
Max. users at the same time 50 5-10 (approx.)
Guest users Yes No
Allow to disable login form Yes No

Technology
SSL Yes No
Websockets Yes No
AJAX (Old technology) No Yes

Features
Multilingual support Yes Yes
Custom company avatar Yes No
Desktop notifications Yes No
See if user is currently writing Yes No
End visitor chat (back-end) Yes No
Last seen info (back-end) Yes No
Visitor connecting info (back-end) Yes No
Mobile or desktop info (back-end) Yes No
Active page info (back-end) Yes No
Full UTF-8 support (All languages) Yes No
Email notifications Yes Yes
Responsive Yes Partly
Full session support Yes Buggy
Cache plugin support Yes Buggy

Licensing & Updates
100% GPL No Yes
New updates Yes No
License 1 domain Unlimited Domains
Стоимость - 24$
FREE download for ForumManager