Compare Flask and Falcon

Flask is a Python web framework for building web applications. It is based on Werkzeug and Jinja 2. It is a minimalist, 'no batteries included' framework. Yet it can be scaled extensively and support complex applications and use cases by adding required functionality as needed. It follows the philosophy that if something needs to be initialized, it should be initialized by the developer.

Falcon is a minimalist WSGI library for building web APIs, app backends and microservices. Compared to Django and Flask, it is fast, extensible, reliable, and encourages RESTful style. It doesn't come with batteries included and is ideal for applications that require a high level of customization. The fminimalist design allows developers to select the best strategies and 3rd-party packages from the Python ecosystem.

Let's see how Flask and Falcon compare on various factors and features and which to choose when.

Flask

Falcon

Overall

Type

Type
Python microframework for building web applications.
Type
The minimalist REST and app backend framework for Python with a focus on reliability, correctness, and performance at scale.

Author

Release Date

Release Date
2010
Release Date
2012

License

Adoption and Ease of Use

Popularity [?]

Popularity [?]
5 Stars
Used by 397,000 projects.
Popularity [?]
1 Star
Used by 5,000 projects.

Used by

Used by
Netflix, Zillow, Lyft.
Used by
LinkedIn, Leadpages, Wargaming, and Rackspace.

Jobs [?]

Jobs [?]
4.5 Stars
1067 job openings which list Flask as a requirement.
Jobs [?]
1.5 Stars
100 job openings which list Falcon as a requirement.

Performance [?]

Performance [?]
5 Stars
Because it is minimal and doesn't have a lot of overhead, Flask is very performant. Extensions could impact performance negatively.
Performance [?]
5 Stars
Very fast, even when compared to microframeworks like Flask. See the benchmarks. *Caution* - The benchmarks are from the vendor itself.

Flexibility

Flexibility
5 Stars
Very flexible and doesn't require users to use any particular project or code layout. (A structured approach is still recommended.)
Flexibility
5 Stars
Very flexible. Ideal for applications that require a high degree of customization and performance tuning.

Ease of Learning

Ease of Learning
5 Stars
Flask is simple and its core features are not difficult to learn. There are also plenty of online resources available to aid in learning.
Ease of Learning
5 Stars
Has a slight learning curve but there are some great online resources, courses tutorials and YouTube videos.
Database Support

RDBMS Support

RDBMS Support
Through Plugins or Extensions
Through Plugins or Extensions
Flask doesn't come with a built-in ORM framework. Developers can use one of many open source libraries or extensions. Such as Flask-SQLAlchemy, Flask-Pony, etc.
RDBMS Support
Built-in Support
Built-in
Doesn't ship with one but developers can use the database library of their choice such as SQLAlchemy.

NoSQL Support

NoSQL Support
NoSQL databases are supported through open source libraries or extensions. To use MongoDB with Flask, Flask-PyMong is a popular choice. CouchDB, Cassandra, and DynamoDB are also supported via libraries.
Verdict Flask is a great choice if you want to develop for a NoSQL database.
NoSQL Support
Doesn't come with built-in libraries but makes it easy for developers to use library of their choice such as MongoEngine to interact with MongoDB.
Web & Core Features

Admin Dashboard

Admin Dashboard
Through Plugins or Extensions
Through Plugins or Extensions
No built-in admin panel, but you can use the Flask-Admin extension. It supports a number of backends like SQLAlchemy, MongoEngine, Peewee etc.
Admin Dashboard
Through Plugins or Extensions
Through Plugins or Extensions
Does not ship with a web-based admin.

REST Support

REST Support
Supported via extensions such as Flask-RESTful, Flask-Classful, Flask-RESTPlus.
REST Support
Encourages the REST architectural style by design. Resource classes implement HTTP method handlers that resolve requests and perform state transitions.

Security

Security
Despite being a minimalist Framework, Flask does an excellent job of addressing common security concerns like CSRF, XSS, JSON security and more out of the box. 3rd party extensions like Flask-Security can be used for common security measures. However, it requires that developers evaluate these extensions carefully for security risks and apply timely updates manually when vulnerabilities are discovered.
Security
No built-in protection but minimal attack surface for writing secure APIs

Templating Library

Templating Library
Flask uses Jinja2 out of the box.
Templating Library
Doesn't ship with one but developers can use Jinja2 or Mako.

Web Forms

Web Forms
No built-in support but there is Flask-WTF extention. For SQLAlchemy support, that is, to create forms based on models, there is WTForms-Alchemy
Web Forms
Falcon features easy and efficient access to submitted multipart forms by using falcon.media.MultipartFormHandler.

Authentication

Authentication
Only provides support for cookie-based sessions but there are extensions available for authentication, authorization and account management.
Authentication
Not built-in but can be easily extended using authentication middlewares like falcon-auth2.

Testing

Testing
Built-in support using Python's unittest framework.
Testing
Support using unittest and pytest. Read more here.

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