FastAPI FastAPI
vs
Flask Flask

This is a side by side comparison of FastAPI and Flask. Two products that are similar in nature, yet provide unique feature-sets that are worth taking in to account before making a purchasing decision or start using the software. This page can help you broadly analyze the products and weigh pros and cons against one another. Allowing you scrutinize peoples opinions about FastAPI and Flask, before making a decision if any of the products fit your use-case.

What is FastAPI?

A modern, fast and highly-performant web framework written in Python. With FastAPI developers can quickly build APIs with performance on par with Node.js and Go thanks to Starlette and Pydantic.

How much does FastAPI cost?

No pricing information available..

What platforms does FastAPI support?

FastAPI is available for Self-Hosted and Python .

Top FastAPI Pros & Cons

Asynchronous support

One of the most exiting feature of FastAPI is its support for async/await. With FastAPI you can write asynchronous code out of the box. A welcoming feature to the Python framework ecosystem which is usually synchronous in nature.

Bullet
Bullet
4 years, 1 month ago
Pro

OAuth 2.0 support

FastAPI integrates well with OAuth 2.0 and external providers.

Cassie
Cassie
4 years, 1 month ago
Pro

Limited educational resources

Since FastAPI is relatively new framework, the community is quiet small. Even though FastAPI provides great documentation and a wide variety of example projects, it can be hard to find external educational information like books, course and tutorials.

Freddie
Freddie
4 years, 1 month ago
Con

Hey, there are more pros and cons available, these are just the ones that people agree with the most. In total people have added 4 FastAPI Pros & Cons

Top FastAPI Alternatives

Bottle

Bottle is a fast, simple and lightweight WSGI micro web-framework for Python. The framework can be used to create lean web applications with Python 2.7 and 3.x. Bottle is distributed as a single file module with no additional dependencies which makes it really easy to get started and later in the development-stage to manage.

Free & Open Source
👍 Most people think Bottle is a good alternative to FastAPI.

Tornado

A free and open-source web framework and asynchronous networking library written in Python. Tornado was originally developed at FriendFeed, and is using a non-blocking network I/O that can be used to scale applications to tens of thousands of concurrent connection. Tornado is a great framework for applications that require long-lived connections between users, and for WebSockets or long polling.

Free & Open Source
👍 Most people think Tornado is a good alternative to FastAPI.

Django

Django is a high-level Python web development framework used for building web application at scale with speed. The framework adhere to a clean and pragmatic design that lets developers develop rapidly. Django ships as a "batteries included" framework and contains many of the features needed for most web applications such as an admin panel, an ORM and templating language. It takes much of the hassle out of web development and lets developers focus on writing their application instead of focusing on authentication, authorization and security.

Free & Open Source
👍 Most people think Django is a good alternative to FastAPI.

The software Flask Flask is removed from the Top FastAPI Alternatives since you are comparing against it. If you are looking for more software, applications or projects similar to FastAPI FastAPI we recommend you to check out our full list containing 27 FastAPI Alternatives.

FastAPI Gallery

What is Flask?

Flask is a micro framework framework written in Python that can be used to build APIs, web services and web applications. Flask is designed from the bottom up to be extremely minimal and easy to use, where your whole application can fit into one single Python file. The framework includes no database abstraction layer, form validation, or any other components, by design. However pre-existing third-party libraries provide common functionality needed to build production ready applications and services.

How much does Flask cost?

No pricing information available..

What platforms does Flask support?

Flask is available for Self-Hosted and Python .

Top Flask Alternatives

Django

Django is a high-level Python web development framework used for building web application at scale with speed. The framework adhere to a clean and pragmatic design that lets developers develop rapidly. Django ships as a "batteries included" framework and contains many of the features needed for most web applications such as an admin panel, an ORM and templating language. It takes much of the hassle out of web development and lets developers focus on writing their application instead of focusing on authentication, authorization and security.

Free & Open Source
👍 Most people think Django is a good alternative to Flask.

Bottle

Bottle is a fast, simple and lightweight WSGI micro web-framework for Python. The framework can be used to create lean web applications with Python 2.7 and 3.x. Bottle is distributed as a single file module with no additional dependencies which makes it really easy to get started and later in the development-stage to manage.

Free & Open Source
👍 Most people think Bottle is a good alternative to Flask.

Pyramid

Pyramid is a web framework written in Python that makes it easy to write applications for the web. With Pyramid, you can start small and finish big. Pyramid offers many features suited for writing both simple and complex software, while providing clear structure as your application grows. Since 1995, the Pyramid team has stayed devoted to professional craftmenship with a deep commitment to quality, which is seen throughout the Pyramid framework and the developer experience and workflow it provide for developers. Pyramid is released free and open-source under the Zope Public License (ZPL) Version 2.1.

Free & Open Source
👍 Most people think Pyramid is a good alternative to Flask.

The software FastAPI FastAPI is removed from the Top Flask Alternatives since you are comparing against it. If you are looking for more software, applications or projects similar to Flask Flask we recommend you to check out our full list containing 15 Flask Alternatives.

Flask Gallery