http://www.liveperson.com
2. Ask Jeeves
http://www.ask.com
3. Answers.com
http://www.answers.com
4. hey inc.
http://www.heyinc.com
5. FaceTime
http://www.facetime.com
6. Brigade
http://www.brigade.com
7. MessageMedia
http://www.messagemedia.com
8. RightNow
http://www.rightnow.com
9. WebHelp
http://www.webhelp.com
10. HumanClick
http://www.humanclick.com