ICQ vs WhatsApp

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
WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends. Secure WhatsApp alternatives are Signal and Telegram.
WhatsApp has better video than ICQ

2016 - WhatsApp launches video calls. ICQ is in panic

Facebook-owned chat service WhatsApp is launching video calling for its over 1 billion users worldwide on iOS, Android and Windows Phone. To use the new feature, WhatsApp users can hit the call button in the top right corner of a conversation, which will bring up an overlaid interstitial asking if you want to voice or video call the friend or family member you’re chatting with. To kick off the video call, you simply select the “video call” option from this screen. With video calling, WhatsApp is belatedly catching up with a number of rivals, including Facebook’s own Messenger app, for example, as well as Skype, Apple’s FaceTime, Viber, LINE and Google’s recently launched Duo, to name a few.