BinaryRPC – Lightweight WebSocket-based RPC framework in modern C++
Hi HN, I’m a recent CS graduate. During the past few months I wrote BinaryRPC, an open-source RPC framework in modern C++20 focused on low-latency, binary WebSocket messaging. Why I built it * Wanted first-class session support, pluggable QoS levels and a simple middleware chain (global, specific, multi handler) without extra JSON/XML parsing. * Easy developer experience A quick feature list * Binary WebSocket frames – minimal overhead * Built-in session layer (login / reconnect / heartbeat) * QoS1 / QoS2 with automatic ACK & retry * Plugin system – rooms, msgpack, etc.…
In plain words
BinaryRPC is an open-source RPC framework built in C++20 that enables low-latency communication over WebSocket using binary messaging instead of JSON or XML. It is designed for developers building real-time applications and includes built-in session management, quality-of-service levels with automatic retries, and a plugin system for extensibility. The framework prioritizes minimal overhead, thread safety, and ease of use through a simple middleware chain.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN, I’m a recent CS graduate. During the past few months I wrote BinaryRPC, an open-source RPC framework in modern C++20 focused on low-latency, binary WebSocket messaging. Why I built it * Wanted first-class session support, pluggable QoS levels and a simple middleware chain (global, specific, multi handler) without extra JSON/XML parsing. * Easy developer experience A quick feature list * Binary WebSocket frames – minimal overhead * Built-in session layer (login / reconnect / heartbeat) * QoS1 / QoS2 with automatic ACK & retry * Plugin system – rooms, msgpack, etc. can be added in one line * Thread-safe core: RAII + folly Still early (solo project), so any feedback on design, concurrency model or missing must-have features would help a lot. Thanks for reading! also see "Chat Server in 5 Minutes with BinaryRPC": https://medium.com/@efecanerdem0907/building-a-chat-server-i...
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