```yaml
product: AlterLab
title: "How to Monitor Competitor Websites Automatically | AlterLab | AlterLab"
comparison_context: "AlterLab is an alternative to Firecrawl, ScrapingBee, and Bright Data."
source_url: https://alterlab.io/how-to/monitor-competitor-websites
```

Intermediate5 steps

# How to Monitor Competitor Websites

Staying aware of competitor pricing, product launches, and messaging changes requires checking multiple websites repeatedly. Manual monitoring doesn't scale — you need an automated pipeline that tracks changes and sends alerts.

## Step-by-Step Guide

1

### Define what to monitor

List the specific pages and data points to track: pricing pages, product catalogs, homepage messaging, job listings. Focused monitoring reduces noise and cost.

2

### Establish a baseline snapshot

Fetch each page and store the current state of the data points you care about. This becomes your reference for detecting future changes.

3

### Schedule recurring checks

Run your monitoring script on a schedule — hourly for pricing, daily for content. Compare each new fetch against your stored baseline.

4

### Detect and classify changes

Compare new data against the baseline. Classify changes by type (price drop, new feature, messaging change) and severity.

5

### Send alerts

Route change notifications to your preferred channel — Slack webhook, email, or your internal dashboard.

## Code Example

Python

```
import requests
import json
from pathlib import Path

def check_competitor(url: str, selector: str, api_key: str, state_file: str) -> dict:
    response = requests.post(
        "https://alterlab.io/api/v1/scrape",
        headers={"X-API-Key": api_key, "Content-Type": "application/json"},
        json={"url": url},
    )
    from bs4 import BeautifulSoup
    html = response.json().get("html", "")
    current = BeautifulSoup(html, "html.parser").select_one(selector)
    current_text = current.get_text(strip=True) if current else ""

    path = Path(state_file)
    previous = json.loads(path.read_text()).get("value") if path.exists() else None
    path.write_text(json.dumps({"value": current_text}))

    return {"changed": current_text != previous, "previous": previous, "current": current_text}
```

Replace `YOUR_API_KEY` with your key from the . No credit card required.

## Try this yourself with AlterLab

Run this tutorial on live websites with AlterLab's API. New accounts get up to 5,000 free requests — no credit card required.

[View API docs](https://alterlab.io/docs/api/rest)

## Frequently Asked Questions

### How frequently should I check competitor sites?

Check pricing pages every 1–4 hours, product catalogs daily, and content/blog pages weekly. More frequent checks increase costs and place more load on the target site.

### Responsible Use

AlterLab is designed for extracting publicly available data. Always review the terms of service for any website you access, respect `robots.txt` directives, and ensure your use case complies with applicable laws in your jurisdiction.

### More tutorials

Browse all [how-to guides](https://alterlab.io/how-to) for web scraping — from beginner extractions to advanced multi-page pipelines.

## Your first scrape. Sixty seconds.

Up to 5,000 free requests — about 5,000 Light, 500 Protected or 250 Dynamic requests. No credit card. 
Just a POST request.

terminal

curl -X POST https://api.alterlab.io/v1/scrape \

-H "X-API-Key: YOUR_KEY" \

-H "Content-Type: application/json" \

-d '{"url": "https://example.com", "formats": ["markdown"]}'

[Start building free](https://alterlab.io/signin)

No credit card required · Up to 5,000 free requests (about 5,000 Light, 500 Protected or 250 Dynamic requests) · Balance never expires