Top 15 C++ Coroutine Projects

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1. coost

   1 15 4,211 7.0 C++

   A tiny boost library in C++11.

   

2. Kargo

   akuity.io sponsored

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3. libgo

   2 2 3,303 2.2 C++

   Go-style concurrency in C++11

   

4. concurrencpp

   3 17 2,757 0.0 C++

   Modern concurrency for C++. Tasks, executors, timers and C++20 coroutines to rule them all

   

5. PhotonLibOS

   4 8 1,224 9.3 C++

   Probably the fastest coroutine lib in the world!

   

   Project mention: How I turned Zig into my favorite language to write network programs in | news.ycombinator.com | 2025-10-26

6. asio-grpc

   5 5 472 8.6 C++

   Asynchronous gRPC with Asio/unified executors

   

7. YACLib

   6 3 298 4.3 C++

   Yet Another Concurrency Library

   

8. Ichor

   7 10 237 8.6 C++

   C++20 Microservice Bootstrapping Framework

   

9. AppSignal

   www.appsignal.com sponsored

   Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.

   

10. ublksrv

    8 2 219 8.6 C++

    ublk: userspace block device driver

    

11. DiscordCoreAPI

    9 9 161 5.0 C++

    A bot library for Discord, written in C++, and featuring explicit multithreading through the usage of custom, asynchronous C++ CoRoutines.

    

12. asyncpp

    10 3 110 4.3 C++

    Async (co_await/co_return) code for c++. This is a base library providing building blocks.

    

13. Rstein.AsyncCpp

    11 1 33 0.0 C++

    The RStein.AsyncCpp library is a set of types that should be familiar for anyone who knows the Task Parallel Library (TPL) for .NET (C#).

    

14. fiber

    12 1 30 1.7 C++

    C++20 fiber implementation with similar interface to std::thread, header-only / x86_64 / Linux only / stackful / built-in scheduler / thread shareable (by fix8mt)

    

15. unet

    13 1 16 7.5 C++

    Asynchronous, high-performance HTTP server in modern C++23 (by Usub-Foundation)

    

    Project mention: Asynchronous backend on modern C++ 23. | dev.to | 2025-12-24

    cmake_minimum_required(VERSION 3.27) project(article) set(CMAKE_CXX_STANDARD 23) set(UREDIS_BUILD_EXAMPLES OFF) set(UREDIS_BUILD_SHARED OFF CACHE BOOL "" FORCE) set(UREDIS_BUILD_STATIC ON CACHE BOOL "" FORCE) set(UREDIS_LOGS OFF CACHE BOOL "" FORCE) set(UPQ_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE) find_package(OpenSSL REQUIRED) find_package(ZLIB REQUIRED) include(FetchContent) include_directories(${article_SOURCE_DIR}) FetchContent_Declare( uvent GIT_REPOSITORY https://github.com/Usub-development/uvent.git GIT_TAG main OVERRIDE_FIND_PACKAGE ) FetchContent_Declare( unet GIT_REPOSITORY https://github.com/Usub-development/unet.git GIT_TAG main OVERRIDE_FIND_PACKAGE ) # Loading ujson from upq FetchContent_Declare( upq GIT_REPOSITORY https://github.com/Usub-development/upq.git GIT_TAG main OVERRIDE_FIND_PACKAGE ) FetchContent_Declare( ulog GIT_REPOSITORY https://github.com/Usub-development/ulog.git GIT_TAG main OVERRIDE_FIND_PACKAGE ) FetchContent_Declare( uredis GIT_REPOSITORY https://github.com/Usub-development/uredis.git GIT_TAG main FIND_PACKAGE_ARGS ) FetchContent_MakeAvailable(uvent unet ulog upq uredis) add_executable(${PROJECT_NAME} src/main.cpp ) target_include_directories(${PROJECT_NAME} PRIVATE /usr/local/include ${CMAKE_CURRENT_LIST_DIR}/include ) target_link_libraries(${PROJECT_NAME} PRIVATE -lpq OpenSSL::Crypto usub::uvent usub::server ZLIB::ZLIB usub::upq usub::ulog usub::uredis )

16. io

    14 1 15 8.2 C++

    Coroutine based asynchronous IO using poll and io_uring for C++20 (by Felspar)

    

17. Flow

    15 2 10 0.0 C++

    Flow is a software framework focused on ease of use while maximizing performance in closed closed loop systems (e.g. robots). Flow is built on top of C++ 20 coroutines and utilizes modern C++ techniques. (by ManuelMeraz)

    

18. SaaSHub

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    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

C++ Coroutine related posts

• Async C++

  1 project | news.ycombinator.com | 22 Feb 2024

• Write C++ as easy as Golang with coost

  1 project | news.ycombinator.com | 9 Sep 2023

• coost - A fantastic C++ library

  3 projects | /r/cpp | 6 Oct 2022

• Coost – A Fantastic C++ Library

  1 project | news.ycombinator.com | 6 Oct 2022

• coost v3.0.0 released - A tiny boost library in C++11

  2 projects | /r/cpp | 8 Sep 2022

• Any good course on asynchronous programming/devops with PHP?

  3 projects | /r/PHP | 12 May 2022

• CO: A go-style coroutine library for C++

  1 project | news.ycombinator.com | 9 Mar 2022
• A note from our sponsor - Kargo
  akuity.io | 4 Sep 2026

  Kargo automates promotion across dev, staging, and prod with approval gates and verification. Open source, built by the team behind Argo CD. Download now. Learn more →

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