What Are the Best Tools and Libraries for Building a Discord-Like App?

Discord, initially launched in 2015 as a chat platform for gamers, has evolved to serve a broader audience with a comprehensive feature set including threads, forums, stage channels, and app integrations. For those looking to build a similar platform, the decision between using a managed chat SDK, like Stream Chat which offers extensive features and integration ease, or building from scratch using WebSocket frameworks such as Phoenix Channels or Socket.IO depends largely on resource availability and desired control over the architecture. Voice and video call functionalities can be efficiently implemented through managed services like Stream Video or open-source solutions like LiveKit, each offering unique advantages in terms of integration and scalability. Backend development for a Discord-like app benefits from a polyglot approach, leveraging languages like Elixir for real-time messaging and Rust for performance-critical tasks, while database architecture should employ a tiered system to manage the distinct workloads of message storage, ephemeral data, and search. Authentication and authorization can be efficiently handled through services like Clerk, Supabase Auth, or Auth0, and the decision on whether to use managed or self-hosted solutions should be driven by the specific needs and growth stage of the app, allowing teams to focus on differentiating features beyond the foundational real-time communication capabilities.