Discord

Discord is a communication platform organised around servers, each containing channels. A channel is text, voice, or a forum, and permissions are set per role, so a server can be private to a team or open to a large community with the same primitives. The product began in gaming and spread because the combination of always-available voice and persistent text suited any group that spends time together online. Voice channels are joinable without a call being placed, which removes the scheduling step that a meeting tool requires. Screen sharing and video are available in the same channel. For communities, the platform provides moderation tooling, role-based access, and bots that extend a server with automation. The tradeoff is that history and membership live in a vendor's account rather than on infrastructure the community controls, and the interface is optimised for live presence rather than for durable documentation.