fastapi VS Flask

Compare fastapi vs Flask and see what are their differences.

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Nutrient – The #1 PDF SDK Library, trusted by 10K+ developers
Other PDF SDKs promise a lot - then break. Laggy scrolling, poor mobile UX, tons of bugs, and lack of support cost you endless frustrations. Nutrient’s SDK handles billion-page workloads - so you don’t have to debug PDFs. Used by ~1 billion end users in more than 150 different countries.
www.nutrient.io
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fastapi Flask
516 142
80,686 68,719
2.1% 0.4%
9.9 8.7
4 days ago about 1 month ago
Python Python
MIT License BSD 3-clause "New" or "Revised" License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

fastapi

Posts with mentions or reviews of fastapi. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2025-02-06.

Flask

Posts with mentions or reviews of Flask. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2025-02-02.

What are some alternatives?

When comparing fastapi and Flask you can also consider the following projects:

Tornado - Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.

django-unicorn - The magical reactive component framework for Django ✨

AIOHTTP - Asynchronous HTTP client/server framework for asyncio and Python

Django - The Web framework for perfectionists with deadlines.

django-ninja - 💨 Fast, Async-ready, Openapi, type hints based framework for building APIs

Robyn - Robyn is a Super Fast Async Python Web Framework with a Rust runtime.

litestar - Production-ready, Light, Flexible and Extensible ASGI API framework | Effortlessly Build Performant APIs

Bottle - bottle.py is a fast and simple micro-framework for python web-applications.

HS-Sanic - Async Python 3.6+ web server/framework | Build fast. Run fast. [Moved to: https://github.com/sanic-org/sanic]

CherryPy - CherryPy is a pythonic, object-oriented HTTP framework. https://cherrypy.dev

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Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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Nutrient – The #1 PDF SDK Library, trusted by 10K+ developers
Other PDF SDKs promise a lot - then break. Laggy scrolling, poor mobile UX, tons of bugs, and lack of support cost you endless frustrations. Nutrient’s SDK handles billion-page workloads - so you don’t have to debug PDFs. Used by ~1 billion end users in more than 150 different countries.
www.nutrient.io
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the 2nd most popular programming language
based on number of references?