Flask Stayed Over Seventy-One Thousand Stars Because Python Developers Love Having a Web Framework Small Enough to Understand and Flexible Enough Not to Fight Back

The blunt version is still useful: Flask stayed big because many developers do not want a framework that makes every decision for them. They want one that gets out of the way until the app proves it deserves more machinery.

GitHub shows Flask at roughly 71,580 stars, which is what happens when a micro-framework becomes the default answer to “I need a Python web service right now.”

What Flask is for

Flask is excellent for:

1. small APIs
2. internal tools
3. webhooks
4. prototypes
5. Python services where you want control over architecture

Its value comes from staying small.

Start a Flask app

python -m venv .venv
source .venv/bin/activate
pip install flask

Create app.py:

from flask import Flask, jsonify

app = Flask(__name__)

@app.get("/health")
def health():
    return jsonify({"ok": True, "framework": "flask"})

Run it:

flask --app app run

Why Flask stayed relevant

Flask solved an enduring need:

1. low ceremony
2. explicit architecture
3. quick startup
4. extension ecosystem
5. easy mental model

That is why it remains so widely taught and used.

How to deploy it

Gunicorn

pip install gunicorn
gunicorn app:app --bind 0.0.0.0:8000

Docker

FROM python:3.12-slim
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
EXPOSE 8000
CMD ["gunicorn", "app:app", "--bind", "0.0.0.0:8000"]

Then:

docker build -t my-flask-app .
docker run -p 8000:8000 my-flask-app

What it solved

Flask kept proving that “small” is not the same as “toy.” It gave Python developers a framework that scaled from quick scripts to real services without forcing a giant architectural commitment on day one.

Sources

• GitHub: pallets/flask
• Flask documentation