Discord is a free voice, video, and text chat app that's used by tens of million of people. It can be accessed from your browser or via a mobile device. It has both public and private servers, so you'll never have to wonder which server to join in order to find all your friends.
The beauty of discord is that it's 100% free for almost everyone-- perfect if you're looking for an easy way to take gaming online without spending any money! Discord also has tons of cool extra features like animated reactions and the ability to share images quickly and easily with your buds. If you want more control over who joins your chats (or what they can do when they get in), there are tougher security options available as well.
Tryout Here: https://discord.com/