Every residential-proxy vendor sells the same promise: clean IPs that look like real homes, not the flagged datacenter ranges that get you blocked. “100% ethically sourced.” “99% clean.” “Premium ISP.” The marketing is interchangeable, and at checkout you have no way to tell which of it is true — the IP arrives after you pay.

What separates a proxy that holds up from one that fails isn’t the promise. It’s whether the address you receive behaves the way the label says, and keeps behaving that way while you use it. That part isn’t a claim. It resolves to a real network, carries a real reputation, and either matches the description or doesn’t. Some of that you can check in about two minutes with free tools, before you trust it with anything; the rest only shows once you put real traffic through it.

This page is the method behind our proxy reviews: what we look for, how we verify it, and what we’ve actually run versus only read about.

Two kinds of buyer, opposite needs

People reach for proxies for two different jobs and want nearly opposite things from the same product:

  • Data collection (scraping). You need many IPs and throughput, and you can tolerate the occasional block — a flagged address mid-run is an annoyance, you rotate past it. Breadth beats consistency.
  • Account operations. You’re running accounts that have to look like distinct, ordinary people in specific places, and stay that way across a whole session. Here a single flagged or rotating IP breaks the illusion on contact. Consistency beats breadth.

We write mainly for the second reader. It’s the harder problem, it’s where vendor marketing is most misleading, and it’s where measurement matters most — so our priorities below are tuned for the operator who needs an IP to hold its identity, not just to exist.

Why a datacenter IP is the problem the others solve

Start from what goes wrong, because the other three types only make sense as fixes for it. A datacenter IP (one owned by a hosting company like AWS or OVH) gets distrusted by consumer-facing services for two separate reasons:

  • Category. Whether an IP belongs to a hosting company is easy to confirm — it’s written into the IP’s ASN, the public registry record of who owns that block of addresses, and hosting networks are well known. And it matters because real people browse, shop, and sign up from home and mobile connections, not from servers. A datacenter IP arriving at a consumer service is anomalous on its face: it reads as a bot or someone hiding behind a server, even if that exact IP has never misbehaved.
  • Reputation. Datacenter ranges are cheap and heavily used for abuse, so they also tend to carry a bad track record — this IP, or its neighbors, has a history of abuse.

Either reason alone gets you flagged; together they’re why a datacenter IP fails the moment a fraud system looks at it [HIGH]. The site sees a server with a questionable history, not a person.

The other three types are all ways to not look like that — a ladder of increasing realism, each rung trading something away:

  • Rotating residential — a real consumer device on a home connection, borrowed through a peer-to-peer network. It passes both tests because it genuinely is a home connection: a residential ISP’s ASN, real home-network behavior. The catch is that the device belongs to someone whose connection can drop mid-session, rotating you to a new address — realism, at the cost of stability. (And how those devices end up in the pool ranges from paid opt-in to silently bundled apps to outright malware, so “ethically sourced” is a claim worth treating as unproven [HIGH].)
  • ISP static (sometimes “static residential”) — IPs registered under a real residential ISP’s ASN, so they carry that ISP’s reputation, but hosted on datacenter servers for stability. They pass the category check at most sites, because the ASN reads “residential ISP.” But they’re still physically datacenter-hosted, so a sophisticated detector can still tell: the giveaway is not the ASN but that the connection behaves like a server. Stable, a notch short of a real home. And the reach is narrow: each block is leased from a specific ISP, so coverage spans far fewer countries than a rotating-residential pool, and the stock is finite. For a niche location you can be pushed back to rotating residential whether you want the instability or not [HIGH].
  • Mobile — IPs from cellular carriers, where many real users share one address at once. That sharing is the source of their trust: blocking the address would block a crowd of real customers, so platforms that reject datacenter and even residential IPs often let mobile through. It’s the highest trust of the four, and because the carrier keeps reassigning the IP, the rotation only adds to the real-user look. The costs are real, though. It’s the priciest type. Control is limited: holding one IP through a long, multi-step session is hard when sticky mobile sessions are short. And the sharing cuts both ways: you share the address with the carrier’s subscribers, and unless you pay for a dedicated line, with the vendor’s other customers too, so someone else’s misbehavior can get it flagged and take your sessions down with it. Nor is the trust permanent. Much of the supply comes from “SIM farms” (racks of phones and SIM cards run by the vendor) that carriers and fraud teams are getting better at spotting, so a mobile connection can still be recognized as a proxy and blocked, especially when paired with a non-mobile (say, desktop) fingerprint [HIGH].

These are not interchangeable, so we never compare across types. A vendor’s rotating residential and another vendor’s ISP static are different products solving different problems; ranking one against the other is a category error. Our reviews are scoped to a single vendor and a single type — and our ratings are too (more on that below).

What we look for

Not the headline features on the price page. Six things, roughly in order of how much they decide the outcome:

  1. Whether it actually works. Does the IP get through the target without a block or CAPTCHA, and hold the session as long as you need it? That has to be tried, not inferred from a score — a clean reputation check predicts success but doesn’t prove it. It’s the thing everything else feeds into.
  2. Behaves as the label says. A block sold as “static residential” should resolve to a residential ISP, not a hosting network wearing a residential label. This is the single most common gap between the price page and the address, and it’s directly measurable (below).
  3. True cost = price ÷ what actually works. A cheap IP that gets blocked half the time is not cheap. The number that matters is cost per working request or session — which first means defining and counting what “working” is (below), not just reading the per-GB or per-IP rate.
  4. No hidden ceilings. Bandwidth caps, concurrency limits, sticky-session time limits, “fair use” throttles: the constraints that don’t show up until you depend on them. You find these by pushing on them (does the sticky session hold as long as it claims, does the metered bandwidth actually deliver?) and by reading the fine print, not from the marketing.
  5. Geo that’s actually there. Coverage on the map is not coverage in the pool. A country listed on the site can be empty in practice, or so thin that a sticky session rotates within minutes. Depth matters more than the length of the country list.
  6. Obtainable without exposing who you are. For the trace-resistant operator, the point is to reduce what links a session back to a person. A proxy that requires identity documents to buy, or routes payment through a gateway that collects them, undercuts that before the IP is ever used. We note where acquisition and payment stay clean and where they don’t — as a fact about the product, not a how-to.

How we check

The check has two layers: a quick one anyone can run in two minutes, and a slower one that only using the proxy can answer. The quick one predicts; the slow one measures.

The quick check — classification and reputation. Two public services do most of it, and both take just an IP address, so you can run the address a vendor gives you the moment you have it:

  • ip-api.com returns the IP’s ASN and organization (the network it belongs to), reverse DNS, and flags for proxy and hosting. A residential ISP shows the ISP’s name and a consumer-looking reverse-DNS hostname; a datacenter shows a hosting company and the hosting flag flips to true (and proxy, for an actual proxy).
  • proxycheck.io returns a proxy yes/no, a connection type, and a risk score from 0 to 100. Zero is what a clean residential address looks like; a “static residential” IP that comes back proxy: yes, risk: 66 is not what was sold.

For a worked example, take Google’s public DNS, 8.8.8.8. It comes back with ASN AS15169 Google LLC, reverse DNS dns.google, hosting: yes, and a proxycheck risk of 0 — a spotless reputation that’s still disqualifying, because the hosting flag and the Google ASN say “server,” not “person.” That’s the two axes in one line: the reputation is clean, the category isn’t.

The two tools keep those axes apart on purpose — proxycheck’s risk is reputation, ip-api’s hosting and ASN are category — which is what lets you see why an address is flagged rather than only that it is. The fraud system at your target doesn’t keep them apart: it folds the category back into its own verdict, which is why a risk: 0 still won’t redeem a datacenter IP. One clean axis isn’t a pass — the target charges you for both.

How you read the result depends on the type. Rotating residential should come back fully clean — proxy: no, risk 0, a consumer ISP, a home-style hostname — because it’s a real home connection. ISP static is different: it’s meant to be datacenter-hosted, so a checker tagging it “hosting” isn’t damning by itself. There the tell is the ASN — a legitimate ISP-static IP resolves to a real consumer ISP; a fake one resolves to a hosting or proxy company while still wearing the “residential” label. Residential ISP versus hosting company is what this check is really for.

This catches the two cheap failures — a mislabeled address (wrong ASN) and a burnt reputation (high risk) — and anyone can repeat it. But it only predicts: a clean result means the IP looks right, not that it will get through a real target, and it says nothing about the ceilings you’ll hit once you depend on it.

The slower test — what only using it can tell you. For that we run the proxy against a fixed set of targets — the same set, the same number of requests, for every vendor, so the numbers actually compare. “Working” means the request comes back normally; a “failure” is a block, a CAPTCHA, or a 403 instead. That ratio is the success rate, and price divided by it is the true cost. For ceilings we pin a sticky session and watch how long the IP really holds, check whether the metered bandwidth we paid for actually transfers, push concurrent connections until something degrades, and read the fine print.

This part is slow, so we only have it where we’ve actually run the proxy — and we say which. Everything else stays “sourced, not tested,” however clean the quick check came back.

This is also why our authority here rests on evidence and method rather than credentials. We’re not a panel of ten-year experts; we’re people who buy the product, measure it, and show the measurement. You can reproduce it.

What we’ve actually tested — and what we haven’t

Most proxy “reviews” rank everything and verify little — ordered more by marketing and affiliate payouts than by first-hand measurement. We do the opposite, and we draw the line explicitly:

  • A product reaches our top tier only if we ran it first-hand — bought it, pointed real traffic through it, and measured the result over more than a single lucky sample.
  • Everything we haven’t run is labeled “sourced, not tested” and capped below the top tier, no matter how good the marketing or the secondhand reviews look.

Each review carries a coverage line stating plainly which claims come from our own measurement and which come from the vendor or third parties. Where we haven’t tested something, we say so rather than implying we have. It’s less tidy than a confident verdict on every option — and it’s the only honest version.

How our tiers work

Because the four types aren’t comparable, our ratings are scoped to a vendor and a type. We don’t rate a vendor as a whole; we rate its residential separately from its ISP static — one can be excellent while the same company’s coverage in a given country is thin, or its other product is untested. A tier is a statement about one product in one category, tested by us, on the priorities above — nothing broader.

Top-tier means: we ran it, it behaved as labeled, it held up under the kind of use the type is meant for, and the true cost was reasonable. It does not mean “best for everyone” — the right type depends on your job (scraping vs account operations), and the right vendor depends on the geo you need.

Where we stand

We keep this independent on purpose: reviews come from measurement, not from who pays the most. Some of the cleanest tools in this space pay no commission at all, and we recommend them anyway where they’re the right answer. And when we get something wrong, we correct it in the open and date the correction, rather than quietly editing it away.

The label is a claim. The IP is a fact. Everything we publish about a proxy comes down to measuring the distance between the two — and showing our work so you can measure it yourself.