Discord

Discord is a cross-platform communication service (voice, video, and text) built around user-created communities called Servers.

Discord delivers flexible, low-latency communication, supporting millions of users across desktop, mobile, and web. The platform organizes users into 'Servers,' which host categorized 'Channels' for specific topics or media: think text channels for general chat, or dedicated voice channels for real-time collaboration. Initially focused on the gaming sector, Discord now serves diverse communities—from study groups and professional business teams to large public fan bases—providing a structured, persistent space for both synchronous and asynchronous interaction.

https://discord.com