Discord is a free voice and text chat application designed for gamers. Founded in 2015, it has grown rapidly to over 45 million users due to partnerships with Twitch streamers and an easy-to-use interface. Discord generates revenue through an optional $5 per month subscription and has raised over $180 million from investors. While free for basic use, its focus on gaming communities and customizable servers has made it popular compared to alternatives like Skype and Teamspeak.