What are some alternatives?
When comparing Apphitect IM and Contus Fly, you can also consider the following products
SendBird - SendBird is messaging-as-a-service.
Slack - A messaging app for teams who see through the Earth!
Mirrorfly - A Complete Chat, Video & Audio Calling Solution
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Applozic - Chat API & In-App Messaging SDK for Mobile & Web Apps Innovate fast, save development cost and delight users with a scalable, secure and customizable Chat
Discord - Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.