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You’ve written useful Python scripts—maybe a scraper, an automation tool, or a mini AI-powered utility. But what if you could take that script and turn it into a profitable micro SaaS product?
In this guide, you’ll learn how to go from script to SaaS by building a full-featured Flask app with:
User authentication Stripe-based billing A protected dashboard SQLite for storage Modular code for long-term scalingNo React. No Docker. No bloat. Just Python and practical business logic.
? Why Micro SaaS?
“Micro SaaS” refers to small-scale, highly focused software products that solve one specific problem, often for a niche audience. Think: “keyword generator for YouTube Shorts creators” or “automated PDF merger for legal teams.”
Benefits:
- Low maintenance
- No investor pressure
- Built solo or with a tiny team
- Great for recurring revenue
Let’s build a product that scrapes job boards and delivers fresh leads (name, role, email, company) to paying users. Non-paying users can only see limited data.
? Stack
- Python 3.10+
- Flask
- Flask-Login (auth)
- Stripe (billing)
- SQLite (DB)
- Jinja2 templates
- Bootstrap (frontend)
- Cron or Celery (optional background jobs)
micro-saas-app/
│
├── app/
│ ├── __init__.py
│ ├── routes.py
│ ├── models.py
│ ├── scraper.py
│ └── utils.py
│
├── static/
│
├── templates/
│ ├── index.html
│ ├── login.html
│ ├── dashboard.html
│
├── config.py
├── app.db
├── run.py
└── requirements.txt
? 1. App Initialization
# app/__init__.py
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
db = SQLAlchemy()
login_manager = LoginManager()
def create_app():
app = Flask(__name__)
app.config['SECRET_KEY'] = 'your-secret'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///app.db'
db.init_app(app)
login_manager.init_app(app)
from .routes import main
app.register_blueprint(main)
return app
? 2. User Model + Login
# app/models.py
from . import db
from flask_login import UserMixin
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
email = db.Column(db.String(100), unique=True)
password = db.Column(db.String(200))
is_paid = db.Column(db.Boolean, default=False)
? 3. Stripe Billing Integration
# routes.py
import stripe
stripe.api_key = "sk_test_..."
@app.route("/checkout")
@login_required
def checkout():
session = stripe.checkout.Session.create(
payment_method_types=["card"],
line_items=[{
"price_data": {
"currency": "usd",
"product_data": {"name": "Pro Plan"},
"unit_amount": 1000,
},
"quantity": 1,
}],
mode="payment",
success_url="http://localhost:5000/success",
cancel_url="http://localhost:5000/dashboard",
)
return redirect(session.url, code=303)
@app.route("/success")
@login_required
def success():
current_user.is_paid = True
db.session.commit()
return render_template("success.html")
? 4. Scraping Logic
# app/scraper.py
import requests
from bs4 import BeautifulSoup
def get_job_leads():
url = ""
res = requests.get(url)
soup = BeautifulSoup(res.text, 'html.parser')
jobs = []
for job in soup.select(".job-card")[:10]:
title = job.select_one(".title").text
email = job.select_one(".email").text if job.select_one(".email") else "Hidden"
company = job.select_one(".company").text
jobs.append({"title": title, "email": email, "company": company})
return jobs
? 5. Dashboard Access Control
# app/routes.py
from .scraper import get_job_leads
from flask_login import login_required, current_user
@app.route("/dashboard")
@login_required
def dashboard():
leads = get_job_leads()
if not current_user.is_paid:
for lead in leads:
lead["email"] = "Upgrade to view"
return render_template("dashboard.html", leads=leads)
6. Dashboard UI (Jinja + Bootstrap)<!-- dashboard.html -->
<h2>Job Leads</h2>
<table class="table">
<thead><tr><th>Title</th><th>Email</th><th>Company</th></tr></thead>
<tbody>
{% for lead in leads %}
<tr>
<td>{{ lead.title }}</td>
<td>{{ lead.email }}</td>
<td>{{ lead.company }}</td>
</tr>
{% endfor %}
</tbody>
</table>
{% if not current_user.is_paid %}
<a href="/checkout" class="btn btn-success">Upgrade to Pro</a>
{% endif %}
? Optional: Email Delivery
You can extend this by adding email delivery:
- Use smtplib or SendGrid
- Schedule with cron or Celery
- Deliver daily/weekly job leads to paying users
Track basic usage:
- Store timestamp of last login
- Count dashboard visits
- Store number of leads viewed
Use it to measure retention, send reminders, or personalize the experience.
? Business Model Ideas
You can apply this exact framework to:
- AI prompt generators
- Daily data reports (e.g., sales, SEO)
- API wrappers for public data
- Chrome extension + backend
- B2B internal tools
Key Lessons- Python is powerful beyond scripts—you can monetize your work
- Flask is lean and easy to deploy anywhere (Heroku, Fly.io, Render)
- Stripe gives you instant revenue infrastructure
- SQLite keeps things simple for MVPs
- Replace the scraper with your own niche tool
- Deploy to the cloud
- Add a custom domain + HTTPS
- Launch on Reddit, IndieHackers, Twitter
- Iterate based on feedback
You don’t need to build a unicorn. One script + one use case + one paywall = a micro SaaS that pays for your rent, freedom, or future startup.
With Python, a Stripe key, and a few lines of HTML—you’re already 90% there.
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