ICQ vs Viber
Last updated: July 23, 2017
ICQ is an instant messaging computer program. ICQ features include sending text messages, offline support, multi-user chats, free daily-limited SMS sending, resumable file transfers, greeting cards, multiplayer games and a searchable user directory. ICQ alternatives for business are: Slack, Hipachat, Microsoft Teams
Viber is a mobile app that provides free international calls and text messages to other Viber users using 3G or Wi-Fi. Uses your existing contact list - check out which of your phone contacts and friends is already on Viber so that you can call and text them for free.
Viber has better video than ICQ