Flask vs FastAPI

Struggling to choose between Flask and FastAPI? Both products offer unique advantages, making it a tough decision.

Flask is a Development solution with tags like python, web-development, restful-apis, microservices.

It boasts features such as Lightweight, Built-in development server, Uses Python syntax, Integrated support for unit testing, RESTful request dispatching, Uses Jinja templating and pros including Easy to get started, Minimal setup required, Flexible and extensible, Large ecosystem of extensions, Integrates with many databases/tools.

On the other hand, FastAPI is a Development product tagged with python, api, web, framework, fast, openapi.

Its standout features include Built on top of Starlette and Pydantic, Automatic interactive API documentation using OpenAPI, Data validation using Python type hints, High performance, Easy to use and learn, Asynchronous request handling, Automatic CORS support, Easy to integrate with ORMs and databases, Auto-generate clients from OpenAPI schema, Supports GraphQL, and it shines with pros like Very fast performance, Intuitive and easy to use, Interactive API documentation, Data validation out of the box, Asynchronous support, Auto-generate clients, Great for rapid API development.

To help you make an informed decision, we've compiled a comprehensive comparison of these two products, delving into their features, pros, cons, pricing, and more. Get ready to explore the nuances that set them apart and determine which one is the perfect fit for your requirements.

Flask

Flask

Flask is a popular Python web framework that provides useful tools and features for building web applications. It is lightweight, easy to get started with, and flexible allowing developers to choose extensions.

Categories:
Development Web Frameworks
python web-development restful-apis microservices

Flask Features

  1. Lightweight
  2. Built-in development server
  3. Uses Python syntax
  4. Integrated support for unit testing
  5. RESTful request dispatching
  6. Uses Jinja templating

Pricing

  • Open Source

Pros

Easy to get started

Minimal setup required

Flexible and extensible

Large ecosystem of extensions

Integrates with many databases/tools

Cons

Limited built-in features

Requires add-ons for advanced functionality

Not ideal for large complex applications

Can be challenging for beginners

Lacks built-in form validation

FastAPI

FastAPI

FastAPI is a modern, high-performance web framework for building APIs with Python 3.6+ based on standard Python type hints. It's very fast and easy to use, has automatic validation, OpenAPI docs, and more.

Categories:
Development Web Framework
python api web framework fast openapi

FastAPI Features

  1. Built on top of Starlette and Pydantic
  2. Automatic interactive API documentation using OpenAPI
  3. Data validation using Python type hints
  4. High performance
  5. Easy to use and learn
  6. Asynchronous request handling
  7. Automatic CORS support
  8. Easy to integrate with ORMs and databases
  9. Auto-generate clients from OpenAPI schema
  10. Supports GraphQL

Pricing

  • Open Source

Pros

Very fast performance

Intuitive and easy to use

Interactive API documentation

Data validation out of the box

Asynchronous support

Auto-generate clients

Great for rapid API development

Cons

Less flexible than Flask for some use cases

Smaller ecosystem than Django REST Framework

Still relatively new, less established than some alternatives