Flask

Python Software Foundation, Wilmington, Delaware, United States

Flask is a lightweight framework for building web applications in Python.

It provides a minimal core that includes URL routing, request/response handling, a built-in development server and debugger, Jinja2 as templating engine, support for RESTful APIs, and the ability to extend functionality via numerous third-party libraries.

According to our data, Flask ranks 30th among the backend frameworks we track.
It has 0.2% of the backend framework market share and is detected on 0.02% of all websites.

Statistics based on 3.6M+ analyzed websites. About this data

💸 Pricing

Flask is available for free.

Free ✔️ Open source

📊 Rankings and Market Share

🏆 Flask Awards

⚡ Sites Built With Flask

We have data on 822 websites that use the Flask backend framework. Here is a list of some of the top ranked ones.

The highest rated site using Flask is pinterest.com.

#WebsiteRankCountryLanguage
1 pinterest.com #15 United States English
2 ifilo.net #883 United States English
3 ivi.tv #2,397 Russia Russian
4 spankbang.party #4,318 American English
5 factorio.com #15,585 Czech Republic English
6 simpleimageresizer.com #16,401 American English
7 source.android.com United States English
8 kabanchik.ua #27,710 Ukraine Ukrainian
9 materialsproject.org #29,251
10 incidecoder.com #33,382 Hungary English
11 savett.cc #40,597 Netherlands English
12 labola.jp #43,215 Japan Japanese
13 librusec.pro #44,136 Russia Russian
14 digitaltmuseum.org #51,432 English
15 digitaltmuseum.se #51,882 Sweden English
16 qt-project.org #52,159 Norway
17 sapling.ai #52,417 United States English
18 octopart.com #53,072 United States English
19 experiments.withgoogle.com United States English
20 learnpython.org #72,748 English

📈 Usage Statistics

Most of the sites that use Flask:

Most of the sites using Flask are from the United States, the Netherlands, and Germany.

  • United States 15.6%
  • Netherlands 12.5%
  • Germany 7.5%
  • Norway 7.5%
  • Spain 7.2%
  • France 5%
  • United Kingdom 4.2%
  • Saudi Arabia 2.7%
  • Russia 2.6%
  • Other 35.2%

Most Flask users speak English, Spanish, or Dutch.

  • English 54.8%
  • Spanish 8.3%
  • Dutch 6.5%
  • Arabic 6.4%
  • Norwegian 5.4%
  • German 4.1%
  • French 3.7%
  • Russian 1.7%
  • Portuguese 1.4%
  • Other 7.7%

The Flask backend framework is especially popular on .com, .nl, and .org top-level domains.

  • .com 36.9%
  • .nl 7.4%
  • .org 6.4%
  • .no 5.5%
  • .net 3.8%
  • .de 3.2%
  • .io 2.6%
  • .es 1.8%
  • .co 1.2%
  • Other 31.2%

The primary market segments for websites utilizing Flask include business, marketing and merchandising, and online shopping.

  • Business 13%
  • Marketing/Merchandising 11.7%
  • Online Shopping 11.1%
  • Internet Services 8%
  • Software/Hardware 6.8%
  • Technical Information 6.8%
  • Blogs/Wiki 6.2%
  • Education/Reference 5.6%
  • General News 3.7%
  • Other 27.1%

🕵️ Similar Technologies

These are some of the best Flask alternatives.

RankName
14
Django
Huntersville, North Carolina, United States

A high-level web framework that encourages rapid development and clean, pragmatic design while following the Model-View-Template architectural pattern and the "don't repeat yourself" principle.

FreeOpen source
43
Frappe Framework
Mumbai, India

A full-stack web application framework written in Python and JavaScript with MariaDB as the primary database.

FreeOpen source
52
CherryPy

An object-oriented Python web framework that lets developers build web applications in a style similar to ordinary Python programs while remaining low level and minimal.

FreeOpen source
53
Anvil
Cambridge, United Kingdom

A platform for building full-stack data applications for the web in Python.

Free$15+/month
55
Web2py

An open-source full-stack Python framework for rapid development of secure database-driven web applications that works out of the box with no configuration files.

FreeOpen source

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💬 Frequently Asked Questions

What is the company behind Flask?

Flask is owned by the Python Software Foundation, headquartered in Wilmington, Delaware, United States.

Can I use Flask for free?

Yes, it is a free backend framework.
It is also open source, and its code is available on GitHub.

Which country uses Flask the most?

The majority of Flask users are from the United States.

Who uses Flask?

According to our data, Flask is used on hundreds of sites, including such established ones as pinterest.com, ifilo.net, and ivi.tv.

How does Flask compare to its competitors?

Flask is a moderately popular backend framework, ranking ahead of 39 other backend frameworks we track.

What are the alternatives to Flask?

Alternatives and possible competitors to Flask may include Django, Frappe Framework, and CherryPy.

👉 See Also

🗃️ About This Data