1. Hangouts bring conversations to life with photos, emoji, and even group video calls for free. Connect with friends across computers, Android, and Apple devices.

  2. A messaging app for teams who see through the Earth!

  3. Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

  4. WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.

  5. Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

  6. Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.

  7. Fast, simple & secure messaging. Privacy that fits in your pocket.

  8. Open-source video calling and chat platform.

  9. Skype for Business, formerly Lync, is unified communications platform that enables instant messaging, conferencing and online meetings

  10. HipChat is hosted group chat and video chat built for teams. Supercharge real-time collaboration with persistent chat rooms, file sharing, and screen sharing.