Flask Review 2026
A lightweight WSGI web application framework
What is Flask?
Flask is a lightweight WSGI web application framework for Python, designed to make getting started quick and easy while scaling to complex applications. It depends on Werkzeug, Jinja, and Click and supports extensions for added functionality.
Best for
Mixed
Use cases
- Web applications
- APIs
- Microservices
Key features
Lightweight WSGI framework
Jinja templating
Blueprints
Extension ecosystem
Pricing
Model
free
Price range
Free and open source (BSD-3-Clause)
Free tier
Yes
Integrations
Flask integrates with 3 tools including:
WerkzeugJinjaClick
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