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Crow framework VS FastAPI

Compare Crow framework VS FastAPI and see what are their differences

Crow framework logo Crow framework

C++ micro web framework inspired by Python Flask

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.
  • Crow framework Landing page
    Landing page //
    2023-07-24
  • FastAPI Landing page
    Landing page //
    2023-05-14

Crow framework features and specs

  • Lightweight
    Crow is a very lightweight web framework designed for C++ which makes it suitable for high-performance applications where resource efficiency is important.
  • Header-only
    Being a header-only library, Crow is easy to integrate into existing C++ projects without the need for complex build configurations or additional dependencies.
  • C++14 Support
    Crow requires C++14, which allows developers to use some modern C++ features that can help with writing more efficient and cleaner code.
  • Ease of Use
    The framework offers a simple and straightforward API that makes setting up HTTP routes and handling requests more convenient compared to other more complex alternatives.
  • Good for Prototyping
    Crow's simplicity and ease of setup make it a good choice for quickly prototyping web applications in C++.

Possible disadvantages of Crow framework

  • Limited Features
    Crow may not have as many built-in features as some more established frameworks, making it necessary to implement certain functionalities manually.
  • Community and Support
    The community around Crow is not as large as other more popular frameworks, which might limit the availability of community support and third-party resources.
  • Lack of Official Documentation
    Crow's documentation may not be as comprehensive or up-to-date as other frameworks, which could hinder learning and development for new users.
  • Platform-Specific Limitations
    Being a C++ framework, Crow might face platform-specific issues, and ensuring cross-platform compatibility may require additional effort.
  • Single-Threaded by Default
    Crow is single-threaded by default, which could be a limitation for handling a large number of concurrent connections, although multithreaded operation can be configured.

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.

Analysis of FastAPI

Overall verdict

  • FastAPI is widely regarded as a good choice, especially for applications that require high performance, scalability, and modern Python features. It is suitable for both simple and complex projects, making it a versatile tool in the web development ecosystem.

Why this product is good

  • FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. It is built on top of Starlette for web framework capabilities and Pydantic for data validation and settings management. FastAPI is known for its excellent performance, automatic generation of interactive API documentation (with Swagger and Redoc), and support for asynchronous programming. Developers appreciate its ease of use, detailed documentation, and helpful error messages.

Recommended for

  • Developers building RESTful APIs
  • Teams looking for a high-performance ASGI-based web framework
  • Projects that require asynchronous programming capabilities
  • Applications needing automatic generation of interactive API documentation
  • Python developers who prefer utilizing type hints for code clarity and validation

Crow framework videos

No Crow framework videos yet. You could help us improve this page by suggesting one.

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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

Category Popularity

0-100% (relative to Crow framework and FastAPI)
Web Frameworks
6 6%
94% 94
Developer Tools
1 1%
99% 99
Project Management
100 100%
0% 0
API Tools
0 0%
100% 100

User comments

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Reviews

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

Crow framework Reviews

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FastAPI Reviews

  1. Kurslog team
    ยท Working at Kurslog ยท

    When our backend team needs to build services for data parsing, aggregators, or high-load APIs, FastAPI is our absolute go-to choice. It completely lives up to its name-development speed is outstanding.

    The combination of Pydantic for data validation and built-in async support keeps our shared codebase clean, strictly typed, and reliable. But the biggest highlight for our cross-functional team is the automatic generation of interactive OpenAPI (Swagger) documentation. Our frontend and mobile developers no longer have to wait for backend engineers to manually update API docs; everything stays perfectly in sync automatically. It has drastically improved our team's communication and delivery speed.

    Pros:    Blazing fast performance (on par with nodejs and go)|Native asynchronous support out of the box|Automatic, interactive documentation generation (swagger/redoc)|Strict typing and data validation with pydantic
    Cons:    Smaller plug-and-play ecosystem compared to older frameworks like django|Requires our architects to design the project structure and directory layout from scratch

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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.
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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/...
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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 businessesโ€™ API needs in todayโ€™s evolving world.

Social recommendations and mentions

Based on our record, FastAPI seems to be a lot more popular than Crow framework. While we know about 312 links to FastAPI, we've tracked only 6 mentions of Crow framework. 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.

Crow framework mentions (6)

  • VueJS goes to microcontroller firmware. This website runs in ESP32 board, with frontend is made with VueJS, TailwindCSS and backend is written in C++.
    I did something similar in the past and used https://github.com/ipkn/crow as web server, in case you want to not implement the web part yourself. Otherwise amazing job! Source: over 3 years ago
  • C++ to Browser JS Framework Recommendations
    Open socket, serve a html page, implement GET/PUT or find framework that do https://github.com/ipkn/crow. Source: about 4 years ago
  • I forked Crow, an abandoned C++ Web Framework. And I'm currently maintaining it.
    Last year I was looking to port a Flask REST API I made to C++ because speed and why not. I went through a few C++ frameworks but eventually chose the abandoned since 2017 Crow. It was by far the easiest to set up and work with (being inspired by Flask in the first place), and it didn't hurt that it supported Websockets. Source: about 5 years ago
  • C++ vs C# .net 5
    All right Op feel free to check this micro framework out if your company is going to build a rest api in C++ https://github.com/ipkn/crow . Source: about 5 years ago
  • cpprestsdk in maintenance mode
    I haven't used any of the following libraries/frameworks but maybe some of them will fit for your needs: - Crow micro web framework. Source: about 5 years ago
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FastAPI mentions (312)

  • I Built My First Machine Learning API โ€” Here's Everything I Learned
    I used FastAPI, a Python framework built specifically for creating APIs quickly, with automatic validation and interactive documentation baked in. - Source: dev.to / 18 days ago
  • Shipping Sovereign SDK: Cryptographic Forensic Receipts and the End of the AI "Prose Tax"
    The Sovereign SDK is a Python-native framework designed to minimize prose overhead while generating ironclad, cryptographic execution receipts for AI agents, complete with drop-in FastAPI/Starlette ASGI middleware. - Source: dev.to / 3 months ago
  • 5-Minute AI Jobs and Closed Tabs โ€” Why We Built Replay-Then-Tail SSE
    We had a feature in production where a single user request could run for five-plus minutes โ€” fetch documents, chunk them, hit an LLM per chunk, synthesize a final answer. We did the obvious thing first: a FastAPI handler that ran the pipeline and streamed progress back to the browser over Server-Sent Events. - Source: dev.to / 4 months ago
  • FastAPI With LangChain and MongoDB
    FastAPI is a Python framework for building APIs quickly, efficiently, and with very little code. - Source: dev.to / 5 months ago
  • I Built A " CrowdSense AI " : A Scalable, Context-Aware Platform for Smart Stadiums
    Backend: Python-based FastAPI for its asynchronous I/O capabilities and rapid JSON serialization. - Source: dev.to / 5 months ago
View more

What are some alternatives?

When comparing Crow framework and FastAPI, you can also consider the following products

Frappe Framework - Frappe is a full stack web framework in Python and JS.

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

Cutelyst - Qt-based web framework using the elegant approach of Catalyst framework

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

Silicon web framework - High performance, middleware oriented C++14 http web framework

Django - The Web framework for perfectionists with deadlines