Kik messenger is a free instant messaging and social networking app that uses smartphones data plan or Wi-Fi connection to send messages to other kik users. Kik makes it easier for users to connect with friends and family. It doesn’t require phone number of the people to whom you want to connect with. Kik allows you to sign up and send messages with just your email address, which helps keep your privacy safe. 
With user name instead of a phone number, you don’t automatically share personal information on Kik. You can only see your display name, user name and profile picture. They can’t see your email address, phone number and birthday. Kik offers options such as group chats and video calls as well.