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Flask vs Lumen: What are the differences?

Introduction

Flask and Lumen are two popular web frameworks used for building web applications. Although they have similarities, there are key differences that set them apart.

  1. Routing: Flask uses decorators to define routes, allowing developers to specify functions to be called when a particular URL is accessed. Lumen, on the other hand, uses a routing syntax that defines routes in a separate file. Routes in Lumen are defined using the Route::get or Route::post methods, making it more explicit and organized.
  2. Size and Simplicity: Flask is known for its simplicity and lightweight nature, making it easy to learn and use. Lumen, on the other hand, is designed to be a micro framework that focuses on speed and minimalism. Lumen has a smaller footprint compared to Flask, providing faster performance and reduced resource consumption.
  3. Community and Ecosystem: Flask has a larger and more mature community compared to Lumen. It has a vast ecosystem with numerous third-party libraries and extensions available, providing developers with a wide range of options for additional functionality. Lumen, being a relatively newer framework, has a smaller community and a more limited set of packages and extensions.
  4. Database Support: Flask supports a wide range of databases through third-party extensions, including popular databases like MySQL, PostgreSQL, and SQLite. Lumen, on the other hand, has built-in support for the Laravel ORM, Eloquent, which simplifies database operations. However, Lumen has limited support for other databases compared to Flask.
  5. Template Engine: Flask uses Jinja2 as its default templating engine, which provides a powerful and flexible way to render dynamic content. Lumen, on the other hand, uses the Blade templating engine, which is the default templating engine for Laravel. Blade offers a more expressive syntax and provides features like template inheritance, making it easier to manage complex views.
  6. Development Philosophy: Flask follows a "micro" philosophy, where it provides a minimalistic core with the flexibility to add additional functionality as needed. Lumen, on the other hand, follows a similar philosophy but focuses on providing a micro framework optimized for building APIs and microservices.

In Summary, Flask and Lumen have distinct differences in terms of routing syntax, size, community support, database support, template engine, and development philosophy.

Advice on Flask and Lumen
Muhammad Waleed
Community & Content Operations · | 3 upvotes · 169.7K views
Needs advice
on
Django REST frameworkDjango REST framework
and
FlaskFlask

Hey! So I am planning to make an e-commerce website with React Native as my frontend technology stack and MongoDB as my database. I was wondering what will be the best REST framework to use for my backend that will simply serve the frontend. Is Django rest framework a good option or should I go with Flask? I am currently leaning towards flask as the development team is well versed in it. Please help!

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Replies (2)
Preeti Yuankrathok
Software Consultant at CODIUM · | 2 upvotes · 68.5K views

If the application is simple such as less endpoint or simple logic, I'd suggest Flask. But what you're building is quite a large system that contains many logics and a lot of models. So I'd suggest you with Django and Django REST framework. Django ORM is also one of the best ORM in the world as well.

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Mayur Borse
Software Engineer at hyphenOs · | 2 upvotes · 71.7K views
Recommends
on
FastAPIFastAPIfastapifastapi

FastAPI is modern microframework. If you haven't used any of them, I'd suggest FastAPI. Django REST is also good if you have previous experience with it.

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kristan-dev
Senior Solutions Analyst · | 8 upvotes · 372.7K views

My journey to developing REST APIs started with Flask Restful, and I've found it to be enough for the needs of my project back then. Now that I've started investing more time on personal projects, I've yet to decide if I should move to use Django for writing REST APIs. I often see job posts looking for Python+Django developers, but it's usually for full-stack developers. I'm primarily interested in Data Engineering, so most of my web projects are back end.

Should I continue with what I know (Flask) or move on to Django?

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Replies (1)
Rafael Torres
Technical Lead at 4Agile · | 9 upvotes · 362.7K views

If you want to be a Web developer with knowledge in another frontend and NoSql technology, maybe continue with Flask. However, if you want to create very fast solutions to grow up with a new business and merge these with data analysis and other tools, Django is the answer. Basically read more about the service architecture where you feel more comfortable, Microservice or Monolithic, but please will not married with any because they solve issues to different contexts.

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Girish Sharma
Software Engineer at FireVisor Systems · | 6 upvotes · 295.1K views
Needs advice
on
BottleBottleFlaskFlask
and
NamekoNameko

Which is the best Python framework for microservices?

We are using Nameko for building microservices in Python. The things we really like are dependency injection and the ease with which one can expose endpoints via RPC over RabbitMQ. We are planning to try a tool that helps us write polyglot microservices and nameko is not super compatible with it. Also, we are a bit worried about the not so good community support from nameko and looking for a python alternate to write microservices.

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Replies (1)
Recommends
on
BottleBottle

Bottle is much less bloated and fast. Its built-in templating system is one of the fastest as it compiles the templates in bytecode. Also Bottle has no depenencies, preventing dependency bloat.

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Saurav Pandit
Application Devloper at Bny Mellon · | 6 upvotes · 317.9K views

I have just started learning Python 3 weeks ago. I want to create a REST API using python. The API will be used to save form data in an Oracle database. The front end is using AngularJS 8 with Angular Material. In python, there are so many frameworks to develop REST APIs.

I am looking for some suggestions which REST framework to choose?

Here are some features I am looking for:

  • Easy integration and unit testing, like in Angular. We just want to run a command.

  • Code packaging, like in java maven project we can build and package. I am looking for something which I can push in as an artifact and deploy whole code as a package.

  • Support for swagger/ OpenAPI

  • Support for JSON Web Token

  • Support for test case coverage report

Framework can have features included or can be available by extension. Also, you can suggest a framework other than the ones I have mentioned.

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Replies (1)
Recommends
on
FlaskFlask
at

For starters flask provides a beautiful and easy way to create REST APIs. Also its supported by excellent beginner docs as well as a very active community. Another good thing with Flask is its widely available list of plugins which allow you to build as you go. Its also good in performance and can scale to a quite decent level. However, if you are sure your project is going to be fairly big, it would be better to start with Django as it provides a lot of features out of the box and is extremely stable in performance. Both these frameworks have support for Swagger, JWT, Coverage Report although you have to install plugins for them. Deploying both of these are fairly simple and there is huge documentation available. Django has one of the best documentations I have come across. I hope I was able to answer your queries.

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Decisions about Flask and Lumen

We decided to expose our small machine learning (ML) pipeline as a REST API. This allows us to nicely separate concerns from the rest of the codebase. There are two very popular choices in Python for building APIs: Flask and FastAPI. We have experience with both, but find that FastAPIs use of static type hints and validation with Pydantic allow us to build better APIs faster.

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Pros of Flask
Pros of Lumen
  • 10
    For it flexibility
  • 9
    Flexibilty and easy to use
  • 8
    Flask
  • 7
    User friendly
  • 6
    Secured
  • 5
    Unopinionated
  • 2
    Secure
  • 1
    Customizable
  • 1
    Simple to use
  • 1
    Powerful
  • 1
    Rapid development
  • 1
    Beautiful code
  • 1
    Easy to develop and maintain applications
  • 1
    Easy to setup and get it going
  • 1
    Easy to use
  • 1
    Documentation
  • 1
    Python
  • 1
    Minimal
  • 1
    Lightweight
  • 1
    Easy to get started
  • 1
    Orm
  • 1
    Not JS
  • 1
    Perfect for small to large projects with superb docs.
  • 1
    Easy to integrate
  • 1
    Speed
  • 1
    Get started quickly
  • 0
    Open source
  • 0
    Well designed
  • 0
    Flexibilty
  • 0
    Productive
  • 0
    Awesome
  • 0
    Expressive
  • 0
    Love it
  • 38
    API
  • 28
    Microframework
  • 19
    MVC
  • 16
    PHP
  • 12
    Open source
  • 11
    Eloquent
  • 10
    Restful & fast framework
  • 8
    Composer
  • 7
    Illuminate support
  • 4
    Brother of laravel and fast
  • 4
    Easy to learn
  • 4
    Fast

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Cons of Flask
Cons of Lumen
  • 10
    Not JS
  • 7
    Context
  • 5
    Not fast
  • 1
    Don't has many module as in spring
  • 3
    Not fast
  • 2
    PHP
  • 1
    Not fast with MongoDB

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What is Flask?

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

What is 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.

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What are some alternatives to Flask and Lumen?
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