Next.jsReact 19TypeScriptElysiaBunUpstash RedisUpstash Realtime
Mercurius is a privacy-first, anonymous chat application built for short-lived, sensitive conversations. Chat rooms automatically expire after 10 minutes, leaving no message history behind. Designed with a serverless, real-time architecture, Mercurius supports live messaging, reactions, read receipts, typing indicators, and presence — without accounts, profiles, or persistent data. Built using Next.js, Elysia, and Upstash Realtime/Redis, it demonstrates how to design ephemeral systems with strong UX and minimal infrastructure. you can view the tweet here
