ExpressJS vs Fastify vs Flask

Overview

Flask

Stacks19.3K

Followers16.2K

Votes60

ExpressJS

Stacks32.6K

Followers24.0K

Votes1.6K

Fastify

Stacks437

Followers523

Votes95

GitHub Stars34.9K

Forks2.5K

Detailed Comparison

Flask	ExpressJS	Fastify
Flask is intended for getting started very quickly and was developed with best intentions in mind.	Express is a minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications.	Fastify is a web framework highly focused on speed and low overhead. It is inspired from Hapi and Express and as far as we know, it is one of the fastest web frameworks in town. Use Fastify can increase your throughput up to 100%.
-	Robust routing;HTTP helpers (redirection, caching, etc);View system supporting 14+ template engines;Content negotiation;Focus on high performance;Executable for generating applications quickly;High test coverage	100% asynchronous: all the core is implemented with asynchronous code, in this way not even a millisecond is wasted.;Highly performant: as far as we know, Fastify is one of the fastest web frameworks in town, depending on the code complexity we can serve up to 20000 request per second.;Extendible: Fastify is fully extensible via its hooks, plugins and decorators.;Schema based: even if it is not mandatory we recommend to use JSON Schema to validate your routes and serialize your outputs, internally Fastify compiles the schema in an highly performant function.;Logging: logs are extremely important but are costly; we chose the best logger to almost remove this cost, Pino!;Developer friendly: the framework is built to be very expressive and help the developer in his daily use, without sacrificing performance and security.
Statistics
GitHub Stars -	GitHub Stars -	GitHub Stars 34.9K
GitHub Forks -	GitHub Forks -	GitHub Forks 2.5K
Stacks 19.3K	Stacks 32.6K	Stacks 437
Followers 16.2K	Followers 24.0K	Followers 523
Votes 60	Votes 1.6K	Votes 95
Pros & Cons
Pros 10 For it flexibility 9 Flexibilty and easy to use 7 User friendly 6 Secured 5 Unopinionated Cons 10 Not JS 7 Context 5 Not fast 1 Don't has many module as in spring	Pros 381 Simple 336 Node.js 244 Javascript 193 High performance 152 Robust routing Cons 27 Not python 17 Overrated 14 No multithreading 9 Javascript 5 Not fast	Pros 21 Performance 13 Easy to use 12 Lightweight 9 Middleware 9 Open source Cons 1 Small community
Integrations
No integrations available	Node.js	Node.js

What are some alternatives to Flask, ExpressJS, Fastify?

Django REST framework

It is a powerful and flexible toolkit that makes it easy to build Web APIs.

Sails.js

Sails is designed to mimic the MVC pattern of frameworks like Ruby on Rails, but with support for the requirements of modern apps: data-driven APIs with scalable, service-oriented architecture.

Sinatra

Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort.

Lumen

Laravel Lumen is a stunningly fast PHP micro-framework for building web applications with expressive, elegant syntax. We believe development must be an enjoyable, creative experience to be truly fulfilling. Lumen attempts to take the pain out of development by easing common tasks used in the majority of web projects, such as routing, database abstraction, queueing, and caching.

Slim

Slim is easy to use for both beginners and professionals. Slim favors cleanliness over terseness and common cases over edge cases. Its interface is simple, intuitive, and extensively documented — both online and in the code itself.

Falcon

Falcon is a minimalist WSGI library for building speedy web APIs and app backends. We like to think of Falcon as the Dieter Rams of web frameworks.

hapi

hapi is a simple to use configuration-centric framework with built-in support for input validation, caching, authentication, and other essential facilities for building web applications and services.

TypeORM

It supports both Active Record and Data Mapper patterns, unlike all other JavaScript ORMs currently in existence, which means you can write high quality, loosely coupled, scalable, maintainable applications the most productive way.

FeathersJS

Feathers is a real-time, micro-service web framework for NodeJS that gives you control over your data via RESTful resources, sockets and flexible plug-ins.