Residential vs datacenter: stop buying the expensive one

Residential proxies cost about three times what datacenter proxies cost. A large share of the people paying for residential did not need to, and found out by never testing the cheaper option. This post is about how to tell, in about five minutes, which one a target actually requires.

The actual difference

A datacenter IP belongs to a hosting company. When a site looks it up, it sees an ASN owned by a cloud provider or a colocation facility, and it can reasonably guess there is no human behind it.

A residential IP belongs to a consumer ISP. The same lookup says “Comcast” or “Deutsche Telekom”, which is what a real person’s home connection looks like. Blocking it risks blocking actual customers, so sites are far more careful about it.

That is the whole distinction. It is not about speed — datacenter is considerably faster — and it is not about reliability. Datacenter IPs are more stable. You are paying residential rates purely for the ASN the target sees.

The five-minute test

Do not reason about this. Measure it. Take fifty URLs that are representative of your job and fetch them through datacenter, then through residential, and compare status codes.

test() {
  ok=0; blocked=0
  while read url; do
    code=$(curl -s -o /dev/null -w '%{http_code}' -x "$1" "$url")
    case "$code" in
      2*) ok=$((ok+1)) ;;
      *)  blocked=$((blocked+1)) ;;
    esac
  done < sample.txt
  echo "$2 — ok:$ok blocked:$blocked"
}

test "http://USER:[email protected]:8000"   datacenter
test "http://USER:[email protected]:8000" residential

Fifty requests of datacenter traffic costs well under a cent. There is no version of this test that is more expensive than guessing wrong for a month.

Reading the result

• Datacenter passes everything. Use datacenter. You just saved two thirds of your budget and got a faster job.
• Datacenter gets 403 or 429 immediately. The site is filtering on ASN. Go residential.
• Datacenter works, then degrades after a few hundred requests. This is rate limiting, not IP filtering. Slow down and rotate more, rather than paying more. See the blocking checklist.
• Both fail. Your problem is not the IP. It is almost certainly headers or TLS fingerprint, and buying pricier proxies will burn money without fixing it.

Cases where datacenter is fine and people assume otherwise

In practice, datacenter tends to be enough more often than reputation suggests:

• Public APIs that authenticate you by key rather than by IP
• Documentation sites, forums, and most content sites
• Government and open-data portals
• Smaller ecommerce sites without a commercial bot-detection vendor
• Anything you are polling on a schedule rather than crawling hard

And the ones where it usually is not:

• Large retail and travel sites with commercial bot protection
• Sneaker and ticket platforms
• Social platforms and their app APIs
• Anything with a login you intend to keep

A note on cost per successful request

The comparison that matters is not price per gigabyte, it is price per page you actually got. Residential at $1.00/GB with a 95% success rate beats datacenter at $0.35/GB with a 20% success rate, and it is not close.

But that arithmetic only works in one direction if you measure it. Run the test, get both success rates, then divide. Most of the time the cheaper option wins on that number too, which is why we keep telling people to start there.

ISP is a third thing, and it is cheaper than you expect

ISP proxies are static addresses that live in a datacenter but whose whois record names a consumer ISP. You get the residential ASN that most filters actually check, at datacenter speed, and the address does not change until you change it.

That combination is the right answer more often than people realise. If a target blocks hosting ranges and you need to look like the same visitor across a login, a cart and a checkout, rotating residential actively works against you — every request arriving from a different city is its own signal. A static ISP address does not have that problem.

Per gigabyte it lands between datacenter and rotating residential, which surprises people who assume anything labelled residential must cost more. The bandwidth is ours rather than rented from someone’s home connection, so you are paying for the ASN and not for the pipe. Where ISP works, it is both cheaper and faster than rotating residential.

Prices for all three are on the pricing page, and each product page says plainly what the thing is bad at.