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 27th among the backend frameworks we track.
It has 0.2% of the backend framework market share and is detected on 0.03% of all websites.

Statistics based on 4M+ 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 1,059 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 spankbang.party #586 English
3 ivi.tv #2,810 Russia Russian
4 ifilo.net #4,817 United States English
5 simpleimageresizer.com #9,545 American English
6 mobygames.com #12,090 English
7 factorio.com #21,181 Czech Republic English
8 labola.jp #22,550 Japan Japanese
9 source.android.com United States English
10 kabanchik.ua #34,268 Ukraine Ukrainian
11 digitaltmuseum.se #35,684 Sweden English
12 dirpy.com #38,309 English
13 savett.cc #41,220 Netherlands English
14 librusec.pro #41,364 Russia Russian
15 agilefingers.com #41,957 English
16 digitaltmuseum.no #48,395 Norway English
17 datos.gob.mx #51,977 Mexico Spanish
18 learnpython.org #52,396 English
19 benchling.com #53,889 United States English
20 materialsproject.org #57,650

📈 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 17.6%
  • Netherlands 12.3%
  • Germany 7.6%
  • Spain 6.9%
  • Saudi Arabia 5.6%
  • Norway 5.1%
  • France 3.9%
  • United Kingdom 3.5%
  • Russia 2.8%
  • Other 34.7%

Most Flask users speak English, Arabic, or Spanish.

  • English 55.7%
  • Arabic 9.5%
  • Spanish 7.6%
  • Dutch 5.8%
  • German 3.9%
  • French 3.4%
  • Norwegian 3.3%
  • Russian 1.9%
  • Portuguese 1.3%
  • Other 7.6%

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

  • .com 40.2%
  • .org 7.7%
  • .nl 6.7%
  • .net 4.1%
  • .no 3.5%
  • .de 2.7%
  • .io 1.7%
  • .es 1.5%
  • .sa 1.2%
  • Other 30.7%

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

  • Online Shopping 13.3%
  • Business 12.8%
  • Marketing/Merchandising 11.1%
  • Internet Services 7.8%
  • Software/Hardware 7.8%
  • Technical Information 6.1%
  • Education/Reference 5.6%
  • General News 4.4%
  • Blogs/Wiki 3.9%
  • Other 27.2%

🕵️ Similar Technologies

These are some of the best Flask alternatives.

RankName
14
Django
Huntersville, North Carolina, United States

A high-level Python 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
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
54
Anvil
Cambridge, United Kingdom

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

Free$15+/month

🆚 Compare Alternatives

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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 over a thousand sites, including such established ones as pinterest.com, ivi.tv, and ifilo.net.

How does Flask compare to its competitors?

Flask is a moderately popular backend framework, ranking ahead of 42 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