µWebSockets

:closed_lock_with_key: Optimized security

Being meticulously optimized for speed and memory footprint, µWebSockets is fast enough to do encrypted TLS 1.3 messaging quicker than most alternative servers can do even unencrypted, cleartext messaging³.

Furthermore, we partake in Google’s OSS-Fuzz with a ~95% daily fuzzing coverage⁴ with no sanitizer issues. LGTM scores us flawless A+ from having zero CodeQL alerts and we compile with pedantic warning levels.

:arrow_forward: Rapid scripting

µWebSockets is written entirely in C & C++ but has a seamless integration for Node.js backends. This allows for rapid scripting of powerful apps, using widespread competence. See µWebSockets.js.

:crossed_swords: Battle proven

We’ve been fully standards compliant with a perfect Autobahn|Testsuite score since 2016². µWebSockets powers many of the biggest crypto exchanges in the world, handling trade volumes of multiple billions of USD every day. If you trade crypto, chances are you do so via µWebSockets.

:wrench: Customizable architecture

µWebSockets builds on µSockets, a foundation library implementing eventing, networking and cryptography in three different layers. Every layer has multiple implementations and you control the compiled composition with flags. There are currently five event-loop integrations; libuv, ASIO, GCD and raw epoll/kqueue.

In a nutshell:

• WITH_WOLFSSL=1 WITH_LIBUV=1 make examples builds examples utilizing WolfSSL and libuv
• WITH_OPENSSL=1 make examples builds examples utilizing OpenSSL and the native kernel

See µSockets for an up-to-date list of flags and a more detailed explanation.