Top 8 C++ Inter-process communication Projects

gRPC

201 40,685 9.9 C++

The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

Project mention: Golang: out-of-box backpressure handling with gRPC, proven by a Grafana dashboard | dev.to | 2024-04-03

gRPC, built on HTTP/2, inherently supports flow control. The server can push updates, but it must also respect flow control signals from the client, ensuring that it doesn't send data faster than what the client can handle.

Cap'n Proto

66 11,163 9.3 C++

Cap'n Proto serialization/RPC system - core tools and C++ library

Project mention: Mysterious Moving Pointers | news.ycombinator.com | 2024-04-14

Yeah I pretty much only use my own alternate container implementations (from KJ[0]), which avoid these footguns, but the result is everyone complains our project is written in Kenton-Language rather than C++ and there's no Stack Overflow for it and we can't hire engineers who know how to write it... oops.
[0] https://github.com/capnproto/capnproto/blob/v2/kjdoc/tour.md

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
ZeroMQ

18 9,256 7.6 C++

ZeroMQ core engine in C++, implements ZMTP/3.1

Project mention: Lightweight and fast AMQP (0-9-1) server | news.ycombinator.com | 2024-04-07

Slightly OT:
Are ZeroMQ and NanoMQ still widely used (and recommended)?
https://github.com/zeromq/libzmq
https://github.com/nanomq/nanomq

rpclib

4 1,598 0.0 C++

rpclib is a modern C++ msgpack-RPC server and client library
iceoryx

10 1,512 9.8 C++

Eclipse iceoryx™ - true zero-copy inter-process-communication

Project mention: Show HN: Comprehensive inter-process communication (IPC) toolkit in modern C++ | news.ycombinator.com | 2024-04-13

Also, when you want to perform some access control with access rights, you have to face sid— and ace-strings - oh they are fun. And, of course, there are all the nasty details; for instance, Windows defines macros that lead to compilation failures since they collide with internal naming. Take a look at this here, maybe it makes your efforts less painless: https://github.com/eclipse-iceoryx/iceoryx/blob/master/iceor...
You could reuse the iceoryx platform layer that enables iceoryx to run on every platform from qnx, linux, freertos, mac, windows. Maybe it can help you as well: https://github.com/eclipse-iceoryx/iceoryx/blob/master/doc/w...

libjson-rpc-cpp

1 936 0.0 C++

C++ framework for json-rpc (json remote procedure call)
lockfree

11 689 8.1 C++

A collection of lock-free data structures written in standard C++11

Project mention: A lock-free ring-buffer with contiguous reservations (2019) | news.ycombinator.com | 2024-02-29

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
areg-sdk

21 237 8.8 C++

AREG is an asynchronous Object RPC framework to simplify multitasking programming by blurring borders between processes and treating remote objects as if they coexist in the same thread.

Project mention: Essentials of Object Oriented and Functional Programming: A Guide to Modular Code | dev.to | 2023-07-27

FP Libraries: gRPC, ZeroMQ, and AREG are examples of libraries with a special focus on providing possibilities for Interprocess Communication. Developed using C++, they facilitate communication through predefined APIs, emphasizing functional programming concepts.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).