Nickle vs Actix

By default nickel catches all errors with its default ErrorHandler and tries to take reasonable actions. In cases where one wants to provide an own ErrorHandler (e.g. for custom 404 pages), it's trivial to write one

Nickel supports defining templates with mustache.rs. All you need is to create the template

nickel makes it easy to map JSON data right onto your struct

Middleware are the extensibility points of nickel. Batteries included! A bunch of existing Middleware comes right with nickel

Routes can be as simple as /foo, use parameters, wildcards or even double wildcards

Actix provides a lot of features out of box. WebSockets, HTTP/2, pipelining etc

Forget about stringly typed objects, from request to response, everything has types

Easily create your own libraries that any Actix application can use