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Flask
Flask

4.3K
3.4K
+ 1
1.1K
Koa
Koa

268
199
+ 1
2
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Flask vs Koa: What are the differences?

Developers describe Flask as "a microframework for Python based on Werkzeug, Jinja 2 and good intentions". Flask is intended for getting started very quickly and was developed with best intentions in mind. On the other hand, Koa is detailed as "Next generation web framework for node.js". Koa aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. Through leveraging generators Koa allows you to ditch callbacks and greatly increase error-handling. Koa does not bundle any middleware.

Flask and Koa can be categorized as "Microframeworks (Backend)" tools.

Flask and Koa are both open source tools. It seems that Flask with 45.2K GitHub stars and 12.7K forks on GitHub has more adoption than Koa with 26.6K GitHub stars and 2.42K GitHub forks.

Netflix, reddit, and Lyft are some of the popular companies that use Flask, whereas Koa is used by Hostr, Dial Once, and Pubu. Flask has a broader approval, being mentioned in 511 company stacks & 531 developers stacks; compared to Koa, which is listed in 44 company stacks and 31 developer stacks.

What is Flask?

Flask is intended for getting started very quickly and was developed with best intentions in mind.

What is Koa?

Koa aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. Through leveraging generators Koa allows you to ditch callbacks and greatly increase error-handling. Koa does not bundle any middleware.
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    What are some alternatives to Flask and Koa?
    Django
    Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.
    Tornado
    By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user.
    ExpressJS
    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.
    Node.js
    Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.
    React
    Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project.
    See all alternatives
    Decisions about Flask and Koa
    Antonio Kobashikawa
    Antonio Kobashikawa
    Web developer | Blogger | Freelancer at Rulo Kobashikawa · | 5 upvotes · 56.4K views
    Node.js
    Node.js
    ExpressJS
    ExpressJS
    MongoDB
    MongoDB
    Vue.js
    Vue.js
    Ionic
    Ionic
    JavaScript
    JavaScript
    ES6
    ES6
    Koa
    Koa

    We are using Node.js and ExpressJS to build a REST services that is middleware of a legacy system. MongoDB as database. Vue.js helps us to make rapid UI to test use cases. Frontend is build for mobile with Ionic . We like using JavaScript and ES6 .

    I think next step could be to use Koa but I am not sure.

    See more
    Pierre Chapuis
    Pierre Chapuis
    at Pierre Chapuis · | 5 upvotes · 57.2K views
    atChilliChilli
    Flask
    Flask
    Hug
    Hug
    SQLAlchemy
    SQLAlchemy
    Python
    Python
    Gunicorn
    Gunicorn

    Unlike our frontend, we chose Flask, a microframework, for our backend. We use it with Python 3 and Gunicorn.

    One of the reasons was that I have significant experience with this framework. However, it also was a rather straightforward choice given that our backend almost only serves REST APIs, and that most of the work is talking to the database with SQLAlchemy .

    We could have gone with something like Hug but it is kind of early. We might revisit that decision for new services later on.

    See more
    Praveen Mooli
    Praveen Mooli
    Technical Leader at Taylor and Francis · | 11 upvotes · 217.2K views
    MongoDB Atlas
    MongoDB Atlas
    Java
    Java
    Spring Boot
    Spring Boot
    Node.js
    Node.js
    ExpressJS
    ExpressJS
    Python
    Python
    Flask
    Flask
    Amazon Kinesis
    Amazon Kinesis
    Amazon Kinesis Firehose
    Amazon Kinesis Firehose
    Amazon SNS
    Amazon SNS
    Amazon SQS
    Amazon SQS
    AWS Lambda
    AWS Lambda
    Angular 2
    Angular 2
    RxJS
    RxJS
    GitHub
    GitHub
    Travis CI
    Travis CI
    Terraform
    Terraform
    Docker
    Docker
    Serverless
    Serverless
    Amazon RDS
    Amazon RDS
    Amazon DynamoDB
    Amazon DynamoDB
    Amazon S3
    Amazon S3
    #Backend
    #Microservices
    #Eventsourcingframework
    #Webapps
    #Devops
    #Data

    We are in the process of building a modern content platform to deliver our content through various channels. We decided to go with Microservices architecture as we wanted scale. Microservice architecture style is an approach to developing an application as a suite of small independently deployable services built around specific business capabilities. You can gain modularity, extensive parallelism and cost-effective scaling by deploying services across many distributed servers. Microservices modularity facilitates independent updates/deployments, and helps to avoid single point of failure, which can help prevent large-scale outages. We also decided to use Event Driven Architecture pattern which is a popular distributed asynchronous architecture pattern used to produce highly scalable applications. The event-driven architecture is made up of highly decoupled, single-purpose event processing components that asynchronously receive and process events.

    To build our #Backend capabilities we decided to use the following: 1. #Microservices - Java with Spring Boot , Node.js with ExpressJS and Python with Flask 2. #Eventsourcingframework - Amazon Kinesis , Amazon Kinesis Firehose , Amazon SNS , Amazon SQS, AWS Lambda 3. #Data - Amazon RDS , Amazon DynamoDB , Amazon S3 , MongoDB Atlas

    To build #Webapps we decided to use Angular 2 with RxJS

    #Devops - GitHub , Travis CI , Terraform , Docker , Serverless

    See more
    Interest over time
    Reviews of Flask and Koa
    Avatar of mjhea0
    Software Engineer at TestDriven Labs
    Review ofFlaskFlask

    Flask is a light, yet powerful Python web framework perfect for quickly building smaller web applications. It's a "micro-framework" that's easy to learn and simple to use, so it's perfect for those new to web development as well as those looking to rapidly develop a web application.

    How developers use Flask and Koa
    Avatar of Jack Littleton
    Jack Littleton uses FlaskFlask

    I use Flask for times when I need to create a REST API that interfaces with other Python code, or there is no specific reason why I'd want to use Node.JS. I prefer Flask because of its small learning curve, allowing me to get started coding as quickly as possible

    Avatar of Cloudify
    Cloudify uses FlaskFlask

    This lightweight web framework enables quick REST API development while enabling easy clustering, and the usage of multiple worker processes required to scale the REST API service to meet high volume requirements.

    Avatar of Sail Tactics
    Sail Tactics uses FlaskFlask

    Service to query NOAA weather forecasts data and service to build tidal current forecast maps using AWS EC2 and Geoserver

    Avatar of OnlineCity
    OnlineCity uses FlaskFlask

    Flask drives our APIs, both the Website APIs and the majority of the REST Messaging APIs

    Avatar of Dave Woolfenden
    Dave Woolfenden uses KoaKoa

    As a smaller, more expressive, and more robust foundation for web applications and APIs.

    Avatar of papaver
    papaver uses FlaskFlask

    used flask for a few personal projects. enjoyed its simplicity and ease of use.

    How much does Flask cost?
    How much does Koa cost?
    Pricing unavailable
    Pricing unavailable
    News about Koa
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