chriskohlhoff/asio

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

6175 stars · 1550 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Asio is a cross-platform C++ library for network and low-level I/O programming that provides a consistent asynchronous model using modern C++. It supplies the basic building blocks for C++ networking, concurrency, and other kinds of I/O, and also ships as Boost.Asio.

Use cases

• write asynchronous network servers and clients in C++
• build low-level TCP/UDP socket applications
• implement concurrency and timers without threads
• develop cross-platform networking code for Linux, macOS, Windows, and FreeBSD
• build high-performance trading or real-time systems

When to choose

• you need a mature, battle-tested asynchronous I/O library for C++
• you want minimal dependencies, usable from C++11 onward
• you need consistent networking behavior across platforms
• you are already using Boost and want Boost.Asio integration

When to avoid

• you want a high-level HTTP framework with routing and middleware out of the box
• your project is not C++ or targets a platform Asio does not support
• you prefer coroutine-only async runtimes with a different programming model

Facets

library · maturity stable

networking concurrency http-server websocket http-client networking developer-tools cross-platform windows bsd cpp cross-platform async-io sockets timers boost header-only proactor linux macos

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