Flask
Flask is a lightweight Python microframework that provides routing and templating while leaving architecture up to you. Extensions add databases, auth, and everything else on demand.
Pros
- Minimal and flexible. A tiny core lets you assemble exactly the stack you need. 0
- Gentle learning curve. A working API is only a few lines of Python. 0
- Great for APIs. Ideal for small services and ML model endpoints. 0
- Python ecosystem. Direct access to the best data and ML libraries. 0
Cons
- Assembly required. Larger apps need many extensions wired together by hand. 0
- Sync by default. Async support is bolted on, unlike FastAPI's native design. 0
- No structure. Freedom leads to inconsistent layouts across teams. 0
- Modest performance. WSGI throughput trails ASGI frameworks under load. 0