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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.

As FastAPI is an open source project, you can find more open source alternatives and stats on LibHunt.
Pricing:
  • Open Source
  • Free
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Top 12 Open-Source Alternatives to FastAPI

Django Flask Laravel ExpressJS Ruby on Rails Yii Framework Adonis JS Tailwind CSS Play Framework Koa.js

Product categories

CSS Framework Design Tools Developer Tools Frameworks (Full Stack) Go Lang Go Web Framework JavaScript Framework MVC Framework PHP Framework PHP MVC Framework Python Web Framework Web Frameworks

Summary

The top open-source alternatives to FastAPI are Django, Flask, and Laravel. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.
  1. Django Landing Page
    Django Landing Page
    1

    Django

    The Web framework for perfectionists with deadlines
    Pricing:
    • Open Source

    #Python Web Framework #Python MVC Framework #Web Frameworks 14 social mentions

  2. Flask Landing Page
    Flask Landing Page
    2

    Flask

    a microframework for Python based on Werkzeug, Jinja 2 and good intentions.
    Pricing:
    • Open Source

    #Python Web Framework #Web Frameworks #Developer Tools 42 social mentions

  3. Laravel Landing Page
    Laravel Landing Page
    3

    Laravel

    A PHP Framework For Web Artisans
    Pricing:
    • Open Source

    #Developer Tools #Web Frameworks #PHP Framework 194 social mentions

  4. ExpressJS Landing Page
    ExpressJS Landing Page
    4

    ExpressJS

    Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
    Pricing:
    • Open Source

    #JavaScript Framework #Node.js Framework #Web Frameworks 425 social mentions

  5. Ruby on Rails Landing Page
    Ruby on Rails Landing Page
    5

    Ruby on Rails

    Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
    Pricing:
    • Open Source

    #Developer Tools #Web Frameworks #Frameworks (Full Stack) 117 social mentions

  6. Yii Framework Landing Page
    Yii Framework Landing Page
    6

    Yii Framework

    Yii is a high-performance component-based PHP framework best for Web 2.0 development.
    Pricing:
    • Open Source

    #PHP Framework #PHP MVC Framework #Web Frameworks

  7. Adonis JS Landing Page
    Adonis JS Landing Page
    7

    Adonis JS

    AdonisJs is a Node.js web framework with breath of fresh air and drizzle of elegant syntax on top of it
    Pricing:
    • Open Source

    #Web Frameworks #JavaScript Framework #Javascript Web Framework 70 social mentions

  8. Tailwind CSS Landing Page
    Tailwind CSS Landing Page
    8

    Tailwind CSS

    A utility-first CSS framework for rapidly building custom user interfaces.
    Pricing:
    • Open Source

    #Developer Tools #Design Tools #Website Design 868 social mentions

  9. Play Framework Landing Page
    Play Framework Landing Page
    9

    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.
    Pricing:
    • Open Source

    #Scala Web Framework #Web Frameworks #Java Web Framework 1 social mentions

  10. Koa.js Landing Page
    Koa.js Landing Page
    10

    Koa.js

    Next generation web framework for node.js
    Pricing:
    • Open Source

    #Web Frameworks #MVC Framework #NodeJS Framework 36 social mentions

  11. CodeIgniter Landing Page
    CodeIgniter Landing Page
    11

    CodeIgniter

    A Fully Baked PHP Framework
    Pricing:
    • Open Source

    #PHP Web Framework #Web Frameworks #Frameworks (Full Stack) 8 social mentions

  12. Gin Gonic Landing Page
    Gin Gonic Landing Page
    12

    Gin Gonic

    Gin is a HTTP web framework written in Go (Golang). It features a Martini-like API with much better performance -- up to 40 times faster. If you need smashing performance, get yourself some Gin. - ...
    Pricing:
    • Open Source

    #Web Frameworks #Go Lang #Go Web Framework 84 social mentions

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