Olark
15,414 websites

Olark offers both free and paid options

http://www.olark.com/

Olark is a lightweight tool to chat with visitors to your website using your existing instant messaging client. Visitors to your website appear as buddies on your Buddy list, their messages to you appear as IMs.

VS

Skype Web Control
4,104 websites

Skype Web Control is free to use

https://www.skype.com/en/

Provides a button on the site to call the user via Skype.

Market Share by Top Websites

1 Olark is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Skype Web Control is clearly lagging behind, losing to Olark in all segments.

Websites Categories

1 Olark has better usage coverage in more websites categories. Including Computers Electronics & Technology, Business & Consumer Services, Science & Education, Lifestyle and 19 other categories.

2 Skype Web Control is leading in Reference Materials.

Geography

1 Olark is leading in most countries, including United States, United Kingdom, Canada, India and 92 other countries.

2 Skype Web Control is leading in Italy, Russia, Vietnam, Poland and 33 other countries.