Market Share by Top Websites

1 Five9 is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Callback Killer is clearly lagging behind, losing to Five9 in all segments.

Websites Categories

1 Five9 has better usage coverage in more websites categories. Including Adult, Finance, Health, Arts & Entertainment and 10 other categories.

2 Callback Killer is leading in Heavy Industry & Engineering, Home & Garden, Vehicles, Business & Consumer Services and 5 other categories.


1 Five9 is leading in most countries, including United States, Canada, United Kingdom, Germany and 71 other countries.

2 Callback Killer is leading in Russia, Ukraine, Belarus, Kazakhstan and 7 other countries.