Express is a flexible Node.js web application framework, providing a robust set of features for building web applications.


Koa is a web framework which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs.


Quality Example
Req.header authorization

"I should also say that i have the token at ctx.request.get authorization koa based i think it s something like req.header authorization with express in all routes"

from question "Passport-jwt authenticate not working well with node-jwt-simple"


"It shows that koa is faster then other framework but as this question is about express and restify express is faster than restify"

from question "Why should I use Restify?"


"See this blog when you have 10000 request koa performs better than express"

from question "Which will be better for API creation - RESTify or KOA.js"

Less hacky

"Koa middleware is much simpler and less hacky than express middleware due to the way middleware flows in a stack-like manner"

from question "Which will be better for API creation - RESTify or KOA.js"

More low level

"Koa doesn t provide this kind of thing out of the box - it s designed to be a little more low level than express"

from question "Expressjs to Koajs - routing and templates?"

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