Flask
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 28th 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.
- 🏠 Website
- 🔗 Links
- </> Source code
Wikipedia💸 Pricing
Flask is available for free.
📊 Rankings and Market Share
- Backend Frameworks
- Rank: 28
- Market share: 0.2%
🏆 Flask Awards
- ⭐ 10th most popular in Norway in the Backend Frameworks category.
- 🔥 18th most popular in the Netherlands in the Backend Frameworks category.
- 🔥 19th most popular in Spain in the Backend Frameworks category.
- ⬆️ 23rd most popular in France in the Backend Frameworks category.
- ⬆️ 24th most popular in Germany in the Backend Frameworks category.
- ⬆️ 25th most popular in the United Kingdom in the Backend Frameworks category.
- ⬆️ 26th most popular in the United States in the Backend Frameworks category.
⚡ Sites Built With Flask
We have data on 735 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.
| # | Website | Rank | Country | Language |
|---|---|---|---|---|
| 1 | pinterest.com |
#15 | English | |
| 2 | #883 | United States | English | |
| 3 | #2,397 | Russia | Russian | |
| 4 | #4,318 | English | ||
| 5 | #14,893 | English | ||
| 6 | #15,585 | Czech Republic | English | |
| 7 | United States | English | ||
| 8 | #27,710 | Ukraine | Ukrainian | |
| 9 | #29,251 | |||
| 10 | #33,382 | Hungary | English | |
| 11 | #40,597 | Netherlands | English | |
| 12 | #43,215 | Japan | Japanese | |
| 13 | #44,136 | Russia | Russian | |
| 14 | #51,432 | English | ||
| 15 | #51,882 | Sweden | English | |
| 16 | #52,417 | English | ||
| 17 | #53,072 | United States | English | |
| 18 | United States | English | ||
| 19 | #72,748 | English | ||
| 20 | #74,733 | English |
📈 Usage Statistics
Most of the sites that use Flask:
- are located in the United States
- have content in English
- use the .com domain extension
- fall into the Business category.
Most of the sites using Flask are from the United States, the Netherlands, and Germany.
- United States 15.5%
- Netherlands 12.6%
- Germany 8.4%
- Norway 7.7%
- Spain 7.3%
- France 4.9%
- United Kingdom 4.6%
- Russia 2.6%
- India 2%
- Other 34.4%
Most Flask users speak English, Spanish, or Dutch.
- English 55.8%
- Spanish 7.7%
- Dutch 6.5%
- Arabic 6%
- Norwegian 5.6%
- German 4.3%
- French 3.8%
- Russian 1.5%
- Portuguese 1.3%
- Other 7.5%
The Flask backend framework is especially popular on .com, .nl, and .org top-level domains.
- .com 36.7%
- .nl 7.2%
- .org 6.7%
- .no 5.6%
- .net 3.9%
- .de 3.4%
- .io 2.6%
- .es 1.6%
- .co 1.2%
- Other 31.1%
The primary market segments for websites utilizing Flask include business, marketing and merchandising, and online shopping.
- Business 14.6%
- Marketing/Merchandising 11.3%
- Online Shopping 9.3%
- Internet Services 8.6%
- Technical Information 7.3%
- Blogs/Wiki 6.6%
- Software/Hardware 6%
- Education/Reference 5.3%
- General News 4%
- Other 27%
🕵️ Similar Technologies
These are some of the best Flask alternatives.
🆚 Compare Alternatives
Compare Flask to…
- 🕵️ Similar frameworks
- ⭐ Market leaders
- 💡 Featured alternatives
- 🔎 All options
Ruby on Rails
Laravel
Next.js
Nuxt💬 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.
Moreover, it is an open source solution, 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
- ✨ Related Technologies
- 💼 All technologies from Python Software Foundation