Multilogin

What Multilogin is

Multilogin is an antidetect browser: a desktop application that lets you run dozens or hundreds of fully isolated browser profiles on a single computer, each with its own digital fingerprint, cookies, storage, and proxy. To any website you visit, every profile looks like a separate person on a separate device — which is what makes it possible to manage many online accounts without them being linked, flagged, or banned.

It launched in 2015 and effectively created the category. A decade later it is still the reference product that newer competitors are measured against, and it remains the choice of agencies, e-commerce sellers, and automation teams that cannot afford to have accounts shut down.

Two browser engines: Mimic and Stealthfox

Most antidetect browsers ship a single Chromium build. Multilogin maintains two separate engines, which is a meaningful advantage:

• Mimic is built on Chromium, so it behaves like Chrome and Edge. Use it when a target platform expects a Chrome-family browser.
• Stealthfox is built on Firefox. Use it when you want a Gecko-based fingerprint, or to diversify your profiles so they are not all Chromium.

Running both engines from one dashboard lets you spread profiles across two distinct browser families, which is harder for anti-fraud systems to correlate.

How fingerprint isolation works

A normal browser leaks a surprising amount of identifying information. Multilogin gives each profile a coherent fingerprint assembled from a database of real-device parameters, so the values it presents actually fit together — a common giveaway of cheap tools is a fingerprint whose parts contradict each other.

Parameters it controls per profile include:

• User-agent, browser version, and platform
• Screen resolution, color depth, and available fonts
• Canvas, WebGL, and AudioContext fingerprints
• Hardware hints such as CPU cores and device memory
• Timezone and geolocation, which can be matched to the proxy location
• WebRTC handling, so your real IP is not exposed behind a proxy
• Language and Accept-Language headers

Cookies and local storage are sandboxed per profile, so a login in one profile is invisible to every other.

Profiles, folders, and cloud sync

Profiles in Multilogin are stored in the cloud, which means you can open the same profile from a different machine and your team can share it without exporting anything by hand. Profiles can be organized into folders and workspaces, bulk-created, tagged, and have cookies imported in bulk — useful when you are onboarding a large set of accounts at once.

Proxy support

Proxies are central to the workflow, and Multilogin treats them as a first-class setting on every profile. You can assign an individual HTTP or SOCKS5 proxy per profile, paste proxies in bulk, and test them before launch. Because timezone and geolocation can be pinned to match the proxy, a profile routed through a residential IP in Berlin will also report a Berlin timezone — removing one of the most common mismatch signals.

Automation and the API

For teams doing scraping or repetitive multi-account work, Multilogin exposes a local automation interface that drives profiles programmatically. It integrates with the mainstream frameworks:

• Selenium
• Puppeteer
• Playwright

You launch a profile through the API, receive a connection endpoint, and then control the browser exactly as you would in a normal automation script — but with the full antidetect fingerprint applied. Headless operation is supported for server-side runs.

Team collaboration

Multilogin was designed for organizations, not just individuals. It offers workspaces, role-based permissions, and profile sharing, so an administrator can decide exactly who can view, edit, or launch which profiles. This is the feature set that makes it viable for agencies and larger operations where several people touch the same accounts.

Supported platforms

Multilogin runs on Windows, macOS (including Apple Silicon), and Linux. There is no native mobile app — it is a desktop tool — though profiles can emulate mobile device fingerprints.

Who it is for

• Affiliate and media-buying teams running many ad accounts
• E-commerce sellers operating multiple storefronts on one marketplace
• Social media agencies managing client accounts at scale
• Web-scraping and automation teams that need stealth plus a real API
• Anyone whose livelihood depends on accounts not getting linked or banned