Flask vs Django: Micro or Full-Stack Python?
Flask is a minimal micro-framework you assemble from extensions; Django is a batteries-included framework with ORM, admin, auth, and conventions.
Flask gives you routing and a request/response cycle and lets you choose every other piece, ideal for small services or bespoke architectures. Django provides an integrated ORM, admin, auth, templating, and migrations with strong conventions, ideal for building full applications quickly. The trade is freedom versus included structure.
| Flask | Django | |
|---|---|---|
| Scope | Micro-framework | Full-stack framework |
| Batteries | Pick your own | ORM, admin, auth included |
| Conventions | Minimal | Strong |
| Flexibility | Very high | Within conventions |
| Best for | Small / bespoke apps | Full applications |
In CI
Django provides an integrated test runner, migrations, and DB setup; Flask tests with pytest and whatever extensions you added. Both work with a disposable database service in CI. Choose Flask for small or unconventional services, Django for full apps that benefit from its included tooling.
Speed it up
Cache the Python environment between runs and migrate against a throwaway DB. Both run on CI runners; faster managed runners shorten install and test steps.
The verdict
Building a small or highly custom service: Flask. Building a full application and wanting ORM, admin, and auth out of the box: Django. Flask for minimalism and control, Django for full-stack productivity.