Run unlimited accounts without the bans.

Why signing out is not the same as being someone else

Most people meet this problem the same way. Two accounts on a platform that allows two accounts, both used carefully from one computer, and one morning both are restricted at once. Nothing was shared: different emails, different passwords, separate browser profiles, maybe even a VPN. The connection the platform saw was the machine.

A browser tells every site it visits far more than the page it wants. It reports the graphics card and driver through WebGL, the exact list of fonts installed, how this particular machine renders a line of text to a canvas, how its audio stack processes a tone, the screen resolution and the space left after the taskbar, the processor core count, the platform, the timezone, the language, and a hundred smaller details. None of these identifies you. Taken together, they identify your computer -- reliably enough that a site can recognise it across accounts, across sessions and long after the cookies are gone. That is browser fingerprinting, and it is why signing out, opening a private window or connecting through a VPN does not separate two accounts. Each of those addresses one layer; the recognition is happening across all of them.

What an antidetect browser actually changes

The idea is simple to state and hard to build: give every account its own computer, without buying every account a computer. A Dual Login profile is a real browser process with its own data directory -- its own cookies, storage, cache and history -- reporting a different, internally consistent device to every site it visits, and reaching the internet through its own proxy. Two profiles on one machine look like two machines in two places, because on every axis a site can measure, they are.

The word doing the work in that paragraph is consistent. Producing a unique fingerprint is easy; anything that adds random noise achieves it, and random noise is itself a signal, because real hardware does not give a different answer each time you ask. What is hard is producing values that agree with one another -- a GPU string that belongs with the claimed operating system, a font list that fits that platform, a screen geometry a shipping device actually has, a timezone that matches where the network says you are. Detection is mostly contradiction-finding, so the goal is not to be unusual. It is to be an unremarkable machine that could exist, and to be the same unremarkable machine tomorrow.

Where the identity is applied, and why it matters

Most tools in this category inject JavaScript into every page to override the browser APIs. It is much easier to build, and it leaves evidence: functions whose source no longer looks native, timing artefacts, and gaps -- a web worker or a cross-origin frame often runs outside the injected context and reports the real machine underneath. Dual Login puts the values into the browser engine itself, read at startup from a signed, encrypted file bound to that profile’s directory. There is no injected script to catch, the values hold everywhere a page can look, and nothing has to be re-applied on each navigation.

The same principle governs automation. Driving a browser the usual way announces itself -- WebDriver sets a flag any script can read, and holding a debugger connection open is a signal in itself. Profiles here launch as ordinary processes with no automation flags, which is what lets them pass sign-in flows that reject automated sessions outright, and when you do drive one, clicks and keystrokes are issued as trusted input events rather than dispatched from page JavaScript. You can script it over CDP or plain HTTP, with no driver to install.

The part nobody puts on a feature list

Sessions have to survive. A tool that isolates identities beautifully and loses your logins every second week is not usable, and this is where most of the unglamorous engineering goes. Cookies and local storage are captured from the running browser while a profile is open and again when it closes, so a login is portable: the same profile opened on another computer arrives signed in rather than at a login screen. A profile checks for a newer copy before it opens, so you never browse on a session another machine has already replaced, and an empty session is never written over a good one -- the failure that quietly destroys logins in tools that treat every write as authoritative.

What it will not do

This market makes promises it cannot keep, so here is the boundary. Everything above is the device layer, and the device layer is one input among several. Platforms weigh IP reputation, account age, payment instruments, phone numbers, content and behaviour as well -- and behaviour undoes more good technical work than any detection method does. Twenty accounts created in an hour from one machine, following the same click path at the same intervals, describe one operator no matter how convincing each identity is. Reusing a phone number or a card across accounts links them at a layer no browser touches. We can give you genuine separation and the controls to keep it consistent; the pacing, the proxies and the discipline are yours, and anyone guaranteeing you the rest is selling something they do not have access to.

One sentence, if you read nothing else

Give each account its own device identity, its own storage and its own network route, keep those three consistent with each other, and stop trying to be unique -- that is the whole of it, and everything on this site is a detail of one of those four clauses. The free plan exists so you can verify each clause yourself before paying for any of them. Verification order, if you want it: the fingerprint checker first, for contradictions; the WebRTC test second, for the leak that undoes everything else; the week-long session third, because durability is the property no demo can show. If all three hold, you have verified more about this product than most buyers verify about anything they run their business on. And if any of the three fails, you have lost an hour and learned it on ten free profiles instead of on a paid plan and a live account -- which is the whole argument for testing in this order.

Where to start reading

If the problem above is new to you, the fingerprint checker is the quickest way to see it rather than take our word for it -- open it in your ordinary browser and look at how much a page you have never visited already knows. If you are comparing tools, the comparison pages name the cases where a competitor is the better answer. And if you are ready to test rather than read, the free plan needs no card.

Is this legitimate?

It is a fair question to ask early rather than late. The software is legal and is used for ordinary commercial work every day -- agencies holding client advertising accounts, sellers running separate legal entities, QA engineers reproducing bugs across browser states, researchers collecting public data, journalists keeping work compartmentalised. Like most tools it can also be misused, which is why our acceptable use policy names the misuse specifically rather than gesturing at it, and why enforcement is real.

The question that actually matters is narrower: whether your particular use is lawful where you are, and consistent with the agreements you accepted on the platforms involved. That varies by platform and by country, it changes, and we are not able to answer it for you -- what we can do is be precise about what the software does, so that you are deciding with accurate facts rather than marketing.

How this differs from the things people try first

Almost everyone arrives having already tried three cheaper answers, so it is worth saying exactly what each one does and where it stops. A private window discards cookies and history when it closes, which protects you from the next person to use your computer and changes nothing a website measures -- same GPU, same fonts, same canvas hash, same screen, same address. Two accounts used in two private windows are as linkable as two accounts used in one ordinary one.

A VPN changes the address and nothing else, which is genuinely half the problem and frequently sold as the whole of it. It also usually changes the address to one shared with thousands of other subscribers, which is its own signal. Chrome’s own profiles separate cookies and storage properly, and stop there: same process, same engine, same reported device, so the browser identity is identical across all of them. A virtual machine per account does achieve real separation, at gigabytes of memory and a full operating system each -- which caps you at a handful on ordinary hardware, and still links every account through one network connection unless you have also solved the proxy problem separately.

Each of those addresses one layer. The linkage happens across all of them at once, which is why the answer has to as well: separate storage, a separate device identity that holds together, and a separate route to the internet, applied together and kept consistent with each other.

What it costs to run properly

Three costs, and only one of them is on the pricing page. The subscription is usually the smallest. Proxies are a separate bill and, past a handful of profiles, generally the larger one -- good residential or mobile addresses are not cheap, and economising there is the single most common reason a careful setup fails, because a shared address links accounts faster than any fingerprint could. Memory is the third: every profile is a genuine browser process, so roughly five concurrent profiles per 4 GB. A plan’s profile count tells you how many identities you may keep, not how many browsers your machine will hold open at once, and those numbers differ by an order of magnitude.

The reason to say this on a homepage rather than bury it is that the alternative is somebody discovering it in week two, having bought the wrong-sized plan and the wrong proxies. Size the machine for what you need open simultaneously, buy fewer accounts on better addresses rather than the reverse, and the rest of the product does what it says.

Who this is for

Agencies holding client advertising and marketplace accounts without sharing one password around the team. Sellers running separate storefronts that must not be associated. Affiliates managing traffic across networks. Developers and QA engineers who need a dozen clean browser states on demand. Researchers collecting public data without a single IP being rate-limited into uselessness. Anyone who has ever been locked out of two accounts on the same morning and understood, too late, that the common factor was the computer.

The free plan is ten profiles, for as long as you want them, with no card -- it exists so you can test the claims on this page before any money moves. Open a profile, point it at a fingerprint checker, look for contradictions rather than a high uniqueness score, then leave a low-stakes account signed in for a week. That week is the real test, and it is the one thing no feature list can tell you.