Comprehensive inter-process communication (IPC) toolkit in modern C++

In plain words

Flow-IPC is a C++ toolkit that enables multiple programs to share data structures and file descriptors with reduced latency and minimal code complexity. It supports zero-copy transmission of Cap'n Proto-encoded messages as well as arbitrary STL-compliant C++ data structures. The toolkit is designed to simplify inter-process communication compared to typical approaches while maintaining performance efficiency for developers working on systems requiring direct data sharing between separate processes.

written from the facts on this page · September 2026

From the sources

Comprehensive inter-process communication (IPC) toolkit in modern C++ (sponsored by Akamai) - Flow-IPC

Welcome! The project comprises a few repositories, but as a user you will likely care about just one. It is: If you'd like to contribute, the link above will surely explain how, as well. Not sure if this is for you? Please check out the Introduction to Flow-IPC blog-post. It summarizes the project and works through an example, including some performance results. [Start here!] Flow-IPC - Modern C++ toolkit for high-speed inter-process communication (IPC) [Start here!] Flow-IPC - Modern C++ toolkit for high-speed inter-process communicationfrom github.com

In the maker’s words, at launch

If you work in C++, and you would like 2+ programs to share data structures (and/or native I/O handles a.k.a. FDs) among each other, there is a good chance Flow-IPC - will make it considerably less annoying to code than typical approaches; and - may massively reduce the latency involved. Those sharing Cap'n…

• 
  C++ Multi-channel/-process/-thread, allocation & communication library2021 · github.com · ▲14

  Inter-process C++ communication library to enable allocation managed between processes/threads and send/receive of allocated regions between producers/consumer processes or threads using this IPC buffer. (and yes it implements an M:N ring buffer too) - Usage · RaftLib/ipc Wiki

• 
  Iceoryx2 – Fast IPC Library for Rust, C++, and C2024 · ekxide.io · ▲122

  Hello everyone, Today we released iceoryx2 v0.4! iceoryx2 is a service-based inter-process communication (IPC) library designed to make communication between processes as fast as possible - like Unix domain sockets or message queues, but orders of magnitude faster and easier to use. It also comes with advanced features such as circular buffers, history, event notifications, publish-subscribe messaging, and a decentralized architecture with no need for a broker. For example, if you're working in robotics and need to process frames from a camera across multiple processes, iceoryx2 makes it…

• CN
  Cap'n Proto, by the ex-maintainer of Protocol Buffers2013 · kentonv.github.com · ▲286
• IB
  IPC between multiple Java processes/JVMs with nanosecond latency2015 · mappedbus.io · ▲114
• 
  I integrated my from-scratch TCP/IP stack into the xv6-riscv OS2025 · github.com · ▲147

  Hi HN, To truly understand how operating systems and network protocols work, I decided to combine two classic learning tools: the xv6 teaching OS and a from-scratch TCP/IP stack. I'm excited to share the result: my own from-scratch TCP/IP networking stack running directly inside the xv6-riscv (https://github.com/pandax381/xv6-riscv-net) kernel. The project uses a modern virtio-net driver, allowing it to run seamlessly in QEMU and communicate with the host machine. Key features: - From-Scratch Stack: The core is powered by microps…

• 
  BinaryRPC – Lightweight WebSocket-based RPC framework in modern C++2025 · github.com · ▲78

  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.…

• 
  /dev/null▲472

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

• 
  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

• 
  Supabase▲2,325

  The Postgres developer platform is now generally available

  Dev tools · 2024 · supabase.com

• 
  Cal.com Platform▲1,601

  Build your pixel-perfect booking experience with Atoms

  Dev tools · 2024 · cal.com

• 
  PaddleBoat▲1,162

  Perfect your sales pitch with realistic AI roleplays

  AI · 2024 · padboat.com

• 
  deco.cx 2.0▲1,078

  Build web apps 10x faster with Deno, JSX, TS & Tailwind

  Dev tools · 2024 · decocms.com

• 
  IXORD AI▲955

  Navigate tasks, ignite creativity

  AI · 2024

• 
  Assista AI▲949

  A central nervous system for all your productivity apps

  AI · 2024 · getassista.com