Optimax Media Delivery
26 websites

Optimax Media Delivery is free to use

http://optmd.com/

OPTIMAX Media Delivery ... We are also one of the few ad servers that labels the ads we deliver in a way that makes it easy for consumers to find and contact us.

VS

WhosOn
532 websites

WhosOn offers both free and paid options

http://www.whoson.com/

Track, Engage and Chat to your web visitors in real time. Hosted and On Premises live chat and visitor tracking software for businesses of all sizes.

Market Share by Top Websites

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

2 In terms of market share, Optimax Media Delivery is clearly lagging behind, losing to WhosOn in all segments.

Websites Categories

1 WhosOn has better usage coverage in more websites categories. Including Home & Garden, Finance, Computers Electronics & Technology, Health and 15 other categories.

2 Optimax Media Delivery hasn't got a lead over WhosOn in any websites category.

Geography

1 WhosOn is leading in most countries, including United Kingdom, United States, Canada, France and 48 other countries.

2 Optimax Media Delivery is leading in Norway and South Africa.