Actix is a few things. The base of it is a powerful actor system for Rust on top of which the
actix-web system was originally built. This is what you are most likely going to work with. What
actix-web gives you is a powerful and very fast web development framework.
actix-web a small and pragmatic framework. For all intents and purposes it’s a
micro-framework with a few twists. If you are already a Rust programmer you will probably find
yourself at home quickly, but even if you are coming from another programming language you should
actix-web easy to pick up.
An application developed with
actix-web will expose an HTTP server contained within a native
executable. You can either put this behind another HTTP server like nginx or serve it up as-is. Even
in the complete absence of another HTTP server
actix-web is powerful enough to provide HTTP/1 and
HTTP/2 support as well as TLS (HTTPS). This makes it useful for building small services ready for
actix-web runs on Rust 1.42 or later and it works
with stable releases.