Scarnox · Blog

Residential vs datacenter proxies for scraping

Residential and datacenter proxies both change the address your traffic appears to come from, but they are not interchangeable. A datacenter proxy routes through servers hosted in a data center. A residential proxy routes through an address that an internet service provider has assigned to a home connection. The difference shows up in speed, in how much a site trusts the address, and in what each one costs to run. This guide compares them and gives you a simple test to decide which one your scraper needs.

The short answer

Use datacenter proxies when the target is not guarding against automation closely, you need high throughput, and you are collecting from a site with a generous rate policy. Use residential proxies when the target scores addresses by origin, when you need a specific country or city, or when datacenter addresses keep getting blocked. Many projects use both: datacenter for the bulk of the work, residential for the pages that refuse anything else.

How they compare

Trust. Sites know which address ranges belong to hosting providers, and many score them lower by default. A residential address looks like any other home visitor, so it starts with a better score. Trust is the biggest reason to pick residential.

Speed. Datacenter connections are usually faster and more stable. Residential connections are slower and can drop, because they run over consumer networks. Plan for longer timeouts and more retries with residential traffic.

Geographic targeting. Residential pools usually offer finer targeting, by country and often by region or city. This matters when a site shows different prices, stock or content by location. Datacenter pools tend to be coarser.

Stability of an address. A datacenter address usually keeps its reputation over time, which helps with sticky sessions. Residential addresses change more often, so session continuity depends more on the provider.

Cost per request. Datacenter proxies are generally cheaper for high volumes. Residential traffic is priced differently and is usually more expensive for the same number of requests. Check the provider's current pricing rather than assuming either side is cheap.

Run a fair test

The only reliable way to choose is to test both against your real target. Keep the test small and fair:

  1. Pick ten pages from the target that represent the real workload.
  2. Run the same script through a datacenter pool, then through a residential pool, using the same pacing and the same headers.
  3. Measure the success rate, the median response time and the number of blocks or challenge pages.
  4. Pick the cheaper pool that meets your success target, not the one with the best raw numbers.
import time
import requests

def measure(urls: list[str], proxy: str) -> dict:
    ok, blocked, times = 0, 0, []
    for url in urls:
        start = time.monotonic()
        try:
            r = requests.get(url, proxies={"http": proxy, "https": proxy}, timeout=30)
            times.append(time.monotonic() - start)
            if r.status_code in (403, 429, 503):
                blocked += 1
            else:
                ok += 1
        except requests.RequestException:
            blocked += 1
        time.sleep(2)  # keep the test polite
    return {
        "success_rate": ok / len(urls),
        "blocked": blocked,
        "median_seconds": sorted(times)[len(times) // 2] if times else None,
    }

Run it on the same list of URLs for each proxy type, and compare the results side by side. Repeat the test at a different time of day, since load on both networks changes.

When a captcha appears

Blocks and captchas are different problems. A residential proxy can reduce how often a captcha appears, but when one does appear you still need a valid token. The live captcha type at Scarnox is PopularCaptcha. The PopularCaptcha Python guide shows how the token is requested and submitted. If the site ties the token to the network address, keep the same proxy for the page and the solve. See proxy vs proxyless captcha for that choice.

Mistakes to avoid

The most common mistake is buying residential traffic for a job that datacenter addresses handle perfectly well. If the target is a public catalogue with a generous rate policy, the extra cost buys you little. The reverse mistake is testing once, on a quiet afternoon, and concluding that a pool is reliable. Load changes through the day, so run your comparison at more than one time. A third mistake is measuring only the success rate. A pool that returns a page that looks fine but is actually a challenge or an empty template has not succeeded, so check the content of the response as well as its status code.

Ethics of residential pools

Residential proxies carry a responsibility that datacenter ones do not. The addresses belong to real households. Choose a provider that sources its addresses with the knowing consent of the people involved, and ask how it does so before you sign up. Avoid any service that routes traffic through devices or software installed without the owner's agreement. That is a privacy harm, and it is also a legal risk for your project.

Scrape responsibly

Next steps

Start with free trial credit, no card needed: create an account and run the PopularCaptcha flow against a page you own. For current rates, see the pricing page.