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Top 10 Big Companies Using Flask

AJ Condez - February 13, 2022

Flask is a micro web framework that is lightweight, minimal, and speedy. This makes it an ideal choice for large-scale enterprise application development. Because of this, there are lots of big companies that use Flask. For example, the development team at popular companies like Netflix, Lyft, and Reddit all use Flask as backend development for their mobile and web applications.

If you are proficient in Flask there will be plenty of job openings available to you across a wide variety of industries. This guide will take a closer look at some of the larger companies that use Flask, what the advantages of using Flask are, and how you can learn Flask.

What Is Flask?

Flask is an open-source microframework written in the Python programming language. Flask allows users to quickly and easily build web applications without worrying about low-level tasks such as thread management and protocol. Due to it being open-source, it’s regularly updated with new tools and features by software engineers and developers.

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Even though Flask is a microframework, it is still rich in features. It uses the Werkzeug WSI toolkit and the Jinja2 template engine for its backend development. It also provides a development server and debugger, and it improves functionality via extensions.

It was developed by Armin Ronacher in 2004 and it is still an incredibly popular framework. Today, it ranks in the most used frameworks among developers . This beginner-friendly code is ideal if you want to get started with fully functional website development.

What Are the Advantages of Flask?

  • Open Source . Flask has an active developer community that continuously contributes new tools and APIs to improve the framework.
  • Lightweight . Flask is a microframework that has built-in modules to keep it lightweight and minimal.
  • Powerful . Flask has almost everything you need to start a web application. This makes it ideal for large companies and high-end production engineers.
  • Speed . Flask lets you build applications quickly and easily. This increases productivity in software development and mobile development.
  • Easy to Use . Flask has an easy-to-understand interface that’s perfect for beginners. Advanced users can add extensions to Flask if they think it is lacking features.

Top Websites Built With Flask

Websites typically use the Flask framework for backend web development. These sites range from social media to online marketplaces to educational organizations. Read on, as we discuss the top websites that use Flask within their technology stack.


Pinterest is a social media site that uses image and link sharing through pinboards. Its use of Flask as a core language and API provide its users with a large database of images, GIFS, and videos.


Zillow is a real estate marketplace that aggregates different listings into their website. Within their stack, the Flask API provides an add-on source code for the development process of different real estate data like property value, sale price, and other property-related information.


Patreon is an online platform that allows content creators to receive monthly compensation through a subscription-based service. Flask is used for its reusable components in API development and web-tool libraries.


Brilliant is an online educational platform that provides users with training courses for subjects like math, science, and information technology. Flask provides rapid development of an intuitive application interface for a streamlined user experience.

Largest Companies That Use Flask: At a Glance

Company Revenue Company Size
Samsung $223.04 billion (2021) 109,940 (2021)
Netflix $28.6 billion (2021) 9,400 (2020)
Uber $14.8 billion (2021) 22,800 (2020)
Zalando $11.7 billion (2019) 14,194 (2020)
Airbnb $5.3 billion (2021) 5,597 (2020)
Lyft $2.8 billion (2021) 4,675 (2020)
Teradata $1.9 billion (2021) 7,543 (2020)
Trivago $340 million (2021) 1,247 (2020)
Reddit $215.5 million (2020) 750 (2020)
Zomato $74 million (2018) 3,755 (2021)

Biggest Companies Using Flask: A Closer Look


Samsung is a tech giant headquartered in Seoul, South Korea. This multinational corporation delivers consumer electronics like smartphones and tablets as well as home appliances like refrigerators and TVs. They use Flask to provide their customers with a seamless UI for easy access to information about their products.


Netflix is a subscription-based online streaming platform that provides a large library of movies, TV shows, and documentaries. They have about 220 million active users . They use Flask within their source code for an easy-to-access API that handles large amounts of data and traffic.


Uber Technologies Inc. is a ride-sharing application that allows its users to book transportation services or food delivery. It uses Flask for its rideshare Marketplace to facilitate dynamic pricing, intelligent matching of highly-rated drivers with highly-rated passengers, and smart supply positioning.

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Zalando is an online marketplace that caters to a multitude of fashion brands and lifestyle products. This ecommerce company is based in Berlin, Germany. It uses extensions with its Flask framework to support its massive scale of products.


Airbnb is an online marketplace that allows users to post rental listings. It ensures that each listing is legitimate through various security tests. RESTFUL API is an architecture-style interface that allows for quick backend development of web services. This is what Airbnb uses to keep track of its listings and users within the marketplace.


Lyft is a vehicle-for-hire booking application that offers services such as rental cars and food delivery. The Flask microframework is used to help provide stability and rapid development for Lyft’s web and mobile app.


Teradata is a software company that provides cloud-based databases and business analytics for various types of enterprises. They use Flask as one of their software development tools for their database and analytics software.


Trivago is a tech company that specializes in data aggregation for hotel and lodging prices. It has an extensive selection of prices so users can compare a range of offerings. Flask is used in the backend of its mobile application to provide breakneck development velocity.


Reddit is a social media site that provides forums for a variety of topics. The website started with Flask as its framework for backend development and has since expanded its tech stack with further tools and applications.


Zomato is a tech company that aggregates restaurant data and provides its users with information like addresses, menus, and prices. It also has a review system and a food delivery option. Zomato uses Flask for the backend portion of its mobile application.

Flask Alternative Comparisons

Lines of code on a computer screen. Companies That Use Flask
Can an alternative framework offer better features than Flask?

While Flask is an excellent choice for a framework, there are alternatives. These alternative frameworks provide different sets of tools that Flask doesn’t offer. They are also simple to use and are great for building APIs. Read on, as we examine these alternatives to Flask.


Django was created by Adrian Holovaty and Simon Willison in 2004. It is a full stack framework that runs on Python. Django offers a more batteries-included approach, integrating solutions like object-relational mapping (ORM) and a template engine. Flask has more flexibility, more learning opportunities, and provides more control.


FastAPI is a web framework that offers high-performance. It’s easy to code and is based on Python. FastAPI is a newer, more modern framework with faster development, fewer bugs, and the ability to build APIs from scratch. However, Flask has been around longer, is more reliable, and is better suited to web app development.


Falcon is a simple lightweight framework based on Python that lets developers build REST APIs with ease. While both frameworks have a lot of similarities, Falcon is more specialized than Flask and is ideal for projects dependent on APIs. If you are looking at building an app with a robust front end, Flask is the better choice.

What’s the Best Way to Learn Flask?

Since Flask uses Python, the best way to learn Flask is through Python coding bootcamps . While there are other resources available to you like blogs and online courses , bootcamps are the best way to learn Flask.

Coding bootcamps equip students with in-demand skills and knowledge to make them job-ready. These are short-term, intensive training sessions that are cost-effective and efficient compared to traditional education.

Top Flask Bootcamps

Should You Learn Flask?

Yes, you should learn Flask. It is simple, easy to use, and ideal for speedy development. Moreover, it’s a popular framework that’s used by a lot of professional developers. According to the 2021 Stack Overflow Survey, Flask ranks as the seventh most popular web framework .

Flask is easy to learn and there are numerous resources available to you. These include coding bootcamps, online courses, and blogs. Furthermore, learning a new framework is vital if you want to become a future backend developer.

So, if you want to work for a company like Netflix, Reddit, or Samsung, then you will need to be proficient in Flask. These are just some of the companies that use Flask, and with the numbers only increasing, there has never been a better time to learn this micro web framework.

Companies That Use Flask FAQ

Do Flask jobs pay well?

Yes, Flask jobs pay very well. According to ZipRecruiter, the average salary for Flask developers is around $114,128 per year . Entry-level jobs start at around $58,000 per year and a senior Flask developer may earn around $157,000 per year.

What do Flask developers do?

A Flask developer is a backend developer for websites and mobile applications. They work behind the scenes to stabilize the core language of the framework. If you want to become a full stack developer then you may need to learn another programming language.

Can a coding bootcamp help me land a Flask job?

Yes, a coding bootcamp can help you land a Flask job. Since coding bootcamps prepare their students to become job-ready individuals, they’ll set you up with the necessary knowledge and skills. Numerous companies hire coding bootcamp graduates so you don’t have to worry about any difficulties in finding a job

Is learning Flask hard?

No, learning Flask is not hard. Since it’s a component of Python, an easy-to-read programming language, learning Flask shouldn’t be difficult, even for a beginner. Furthermore, it has a simple interface that provides you with different tools for complex web development.

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AJ Condez

About the author: AJ, from Manila, Philippines, holds a Bachelor's Degree in Accountancy from AMA Computer College. He has also taken courses from Technical Education and Skills Development Authority. Previously, he worked as a content manager for New Wave Media, handling WordPress websites, publishing SEO-friendly content, and supervising teams of writers and editors. He has also written content for SEO sites and his personal website. At Career Karma, AJ hopes to provide up-to-date information to deliver beneficial content to help readers start new careers. In his free time, AJ enjoys reading, journaling, and playing board games.

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