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FastAPI VS .NET Core

Compare FastAPI VS .NET Core and see what are their differences

FastAPI logo FastAPI

FastAPI is an Open Source, modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.

.NET Core logo .NET Core

.NET Core is a cross-platform free and open-source managed software framework similar to .
  • FastAPI Landing page
    Landing page //
    2023-05-14
  • .NET Core Landing page
    Landing page //
    2023-03-12

FastAPI features and specs

  • High Performance
    Built on Starlette and Pydantic, FastAPI is one of the fastest frameworks for Python, providing high performance due to its asynchronous request handling.
  • Automatic Interactive API Documentation
    FastAPI automatically generates interactive API documentation via Swagger UI and ReDoc, which are very helpful for development and testing.
  • Type Checking and Validation
    With Pydantic models and Python type hints, FastAPI provides automatic data validation and type checking, reducing the chance of runtime errors.
  • Ease of Use
    Its syntax and design make it easy to learn for Python developers, offering a smooth development experience while reducing boilerplate code.
  • Asynchronous Support
    FastAPI supports asynchronous programming, allowing for better performance for I/O-bound operations, making it optimal for handling many simultaneous connections.
  • Extensive Documentation
    It has comprehensive and well-structured documentation, which is very useful for both beginners and advanced users.
  • Community and Ecosystem
    FastAPI has a growing community and ecosystem, with many plugins and integrations available to extend its functionality.

Possible disadvantages of FastAPI

  • Learning Curve for Asynchronous Programming
    Although FastAPI itself is easy to learn, grasping the concepts of asynchronous programming in Python can be challenging for beginners.
  • Complex Dependencies
    Using Pydantic for advanced validation can make the request models complex, requiring a deeper understanding of Pydantic and its functionalities.
  • Early Stage Libraries
    Some third-party libraries and extensions specifically tailored for FastAPI might still be in early stages of development and lack long-term stability.
  • Limited Real-World Examples
    Although the documentation is extensive, there might be limited real-world examples and case studies readily available compared to more mature frameworks.
  • Deployment Complexity
    Deploying FastAPI applications might be more complex in comparison to traditional synchronous frameworks, mainly due to the need for asynchronous server setups.

.NET Core features and specs

  • Cross-Platform
    .NET Core is designed to be cross-platform, allowing developers to build and run applications on Windows, macOS, and Linux, which provides flexibility in deployment.
  • Performance
    .NET Core offers high performance and scalability, making it suitable for a wide range of applications, from microservices to large-scale cloud services.
  • Microservices Friendly
    .NET Core's modularity and lightweight nature make it a good fit for developing microservices and deploying them using containers.
  • Unified Development Experience
    .NET Core provides a consistent set of development tools across different platforms, which enhances productivity and allows developers to use familiar tools.
  • Open Source
    Being open-source, .NET Core encourages community contributions and transparency, providing developers with access to the source code and reducing vendor lock-in.
  • Side-by-Side Versioning
    .NET Core allows multiple versions to be installed and run on the same machine, ensuring applications can run with their compatible version without affecting others.

Possible disadvantages of .NET Core

  • Learning Curve
    Developers who are new to .NET Core might face a steep learning curve, especially if they are switching from the traditional .NET Framework.
  • Limited Library Support
    While improving, .NET Core may have limited support for some libraries or frameworks that are available in the full .NET Framework.
  • Evolving Platform
    As a relatively newer platform compared to the full .NET Framework, .NET Core is still evolving, which can lead to frequent changes and updates.
  • Compatibility Issues
    Porting existing applications from the .NET Framework to .NET Core may introduce compatibility issues that require additional refactoring.

FastAPI videos

FastAPI from the ground up

More videos:

  • Tutorial - 30 Days of Python - Day 14 - Web App with Flask, FastAPI, ngrok, and Invictify - Python TUTORIAL
  • Review - [PT] Python - API com FastAPI - Chat | twitch.tv/codeshow

.NET Core videos

.NET Core 3.0 & C# - Should I learn it?

More videos:

  • Review - .NET Design Review: .NET Core 3.1
  • Review - Why Should You Migrate To .NET Core 3.0?

Category Popularity

0-100% (relative to FastAPI and .NET Core)
Developer Tools
93 93%
7% 7
Web Frameworks
86 86%
14% 14
API Tools
100 100%
0% 0
Python Web Framework
85 85%
15% 15

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare FastAPI and .NET Core

FastAPI Reviews

The 20 Best Laravel Alternatives for Web Development
FastAPI, as the name hints, is a swift mover. Built on Starlette, it’s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now that’s something.
25 Python Frameworks to Master
Since its release in 2018, it has rapidly gained popularity due to its great performance and simplicity. In fact, according to PyPi Stats, FastAPI has over 9 million monthly downloads, surpassing even full-stack frameworks like Django.
Source: kinsta.com
3 Web Frameworks to Use With Python
myapp/ is the main directory of your FastAPI application. It includes all the other files and directories needed for the application.static/ is a directory used to store static assets such as CSS, JavaScript, and image files. These assets are served directly by the web server and are typically used to add visual styling and interactivity to the application.css/, img/, js/...
Best Alternatives to FastAPI App Free for Windows (2021)
FastAPI Alternative – So many alternatives app to FastAPI that you must to know out there. And, looking for an ideal software was not easy matter. Lucky you, at this page you can find the best replacement app for FastAPI. So what you are waiting for, get the latest FastAPI alternative app for Windows 10 from this page.
Top 5 Back-End Frameworks to Consider for Web Development in 2021
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It is fast when compared to other major Python frameworks like Flask and Django. FastAPI gives great flexibility to fulfill businesses’ API needs in today’s evolving world.

.NET Core Reviews

We have no reviews of .NET Core yet.
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Social recommendations and mentions

Based on our record, FastAPI seems to be a lot more popular than .NET Core. While we know about 286 links to FastAPI, we've tracked only 7 mentions of .NET Core. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

FastAPI mentions (286)

  • Building Weather & History Story Cards with Python and FastAPI
    By the end of this tutorial, you’ll see how I used FastAPI and Jinja2 to turn raw JSON into a dynamic timeline of weather and history that feels informative and fun. - Source: dev.to / 9 days ago
  • Build Code-RAGent, an agent for your codebase
    The only thing left to do then was to build something that could showcase the power of code ingestion within a vector database, and it immediately clicked in my mind: "Why don't I ingest my entire codebase of solved Go exercises from Exercism?" That's how I created Code-RAGent, your friendly coding assistant based on your personal codebases and grounded in web search. It is built on top of GPT-4.1, powered by... - Source: dev.to / 10 days ago
  • Understanding the Relation Between FastAPI and Uvicorn
    FastAPI and Uvicorn are two essential building blocks when developing high-performance Python APIs. - Source: dev.to / 11 days ago
  • Python: Why Quart Might Be the Better Choice over FastAPI
    Python's diverse ecosystem of web frameworks offers developers a wide range of choices for building robust and efficient applications. In the realm of asynchronous frameworks, Quart and FastAPI have emerged as popular options. While FastAPI has gained considerable attention for its speed and developer-friendly features, Quart presents a compelling alternative, especially for those already familiar with the Flask... - Source: dev.to / 21 days ago
  • Partner Models for Payments: How Rapyd Powers Partner Payment Solutions
    Let's look at how to use Rapyd to build a simple system where you can onboard merchants, add products, receive payments, and receive payouts, all powered by Rapyd's API. To fully integrate this system, businesses can sign up as a Rapyd partner to access additional capabilities for managing merchant transactions. In this tutorial, you'll see how to use the FastAPI framework in Python to create endpoints for each... - Source: dev.to / about 1 month ago
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.NET Core mentions (7)

  • .Net Help
    Start at the beginning. Good luck and welcome! Source: over 1 year ago
  • How can I start using C# outside Unity?
    I know multiple tutorials have already been posted but even MS themselves have a Hello World tutorial https://dotnet.microsoft.com/en-us/learn/dotnet/hello-world-tutorial/intro. Source: over 2 years ago
  • Learning C# and nothings working
    Have you tried running a simple “Hello, World!”program to see if you have everything installed correctly? Source: over 2 years ago
  • Learning ASP.NET CORE on m1 MAC?
    If you're just beginning vscode is good enough to get started. Just follow this 5 min tutorial to get you going https://dotnet.microsoft.com/en-us/learn/dotnet/hello-world-tutorial/intro as it covers Maros too. Here's a vscode tutorial https://www.syncfusion.com/blogs/post/how-to-develop-an-asp-net-core-application-using-visual-studio-code.aspx. Source: over 2 years ago
  • I have a noob question (And a short one)
    There are a ton of free tutorials and guides out there, including ones from Microsoft themselves. Source: over 3 years ago
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What are some alternatives?

When comparing FastAPI and .NET Core, you can also consider the following products

Django - The Web framework for perfectionists with deadlines

Play Framework - An open source web framework which follows the model-view-controller architecture. It is light-weight, web-friendly, and stateless. It provides minimal overhead for highly-scalable applications.

Flask - a microframework for Python based on Werkzeug, Jinja 2 and good intentions.

ASP.NET - ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS and JavaScript.

ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple

Laravel - A PHP Framework For Web Artisans