A guardian for
every device you own.AI device security that hunts clones, spyware and infostealers — and proves what it found.
RankShield Device Guardian is AI device security that runs beneath the surface: it scans your Mac, PC, phone and Linux systems for clones, spyware, infostealers and hidden command channels, quarantines what's malicious, and records what it did — on one network, so a threat seen on one device protects them all.
Someone can
become your device.
A cloned phone, a stolen session cookie, an infostealer quietly reading your passwords — the modern attack doesn't break in, it impersonates. RankShield was born from exactly this: a founder's phone cloned in real life. Protecting the device is where trust starts.
Scan below
the surface.
Antivirus matches known files. A guardian watches behavior: what persists, what talks to the network, whether your device identity is intact. The scan sweeps every process — and the clean ones seal, the malicious ones stand out.
Contain the threat.
Keep the device.
What's malicious is isolated — persistence removed, command channels cut, the clone's foothold quarantined — while everything legitimate keeps running. Protection that defends the device without disrupting your day.
Mac, Windows, phone,
Linux — one network.
Your life spans devices, so your guardian does too. Deep guardians for each platform share one RankShield Network, so a threat pattern seen on a Mac protects a phone. We ship each platform honestly — some live in early access, some coming soon.
It tells you
what it found.
Every scan and quarantine is recorded as verifiable evidence — not a vague "you're protected," but a checkable record of what the guardian saw and did. Security you can inspect, on the device you depend on.
What is a device guardian?
A device guardian is deep, always-on security that protects a device below the surface — watching processes, persistence, network behavior and identity, not just scanning files for known viruses. The threats that matter now rarely announce themselves: a phone is cloned off-device, an infostealer reads your saved passwords and session cookies, spyware persists quietly, a command-and-control channel beacons out. Signature-based antivirus, which matches files against a list of known malware, misses all of it. RankShield Device Guardian takes the guardian approach across macOS, Windows, iPhone, Android and Linux — hunting behavior and integrity anomalies, quarantining what's malicious, and doing it on one RankShield Network so an attack pattern seen on any device strengthens the defense of every other. And because RankShield's whole premise is verifiability, the guardian doesn't just claim you're safe — it records what it scanned and what it found as evidence you can check.
Which device does RankShield protect — and what's live today?
One guardian, every platform, on the same network — with honest status for each. Pick your device to see what it does and where it stands.
macOS guardian
EARLY ACCESSA notarized deep guardian for Mac that goes beyond antivirus — hunting persistence, command-and-control channels, and hidden processes that ordinary tools miss.
Windows guardian
COMING SOONA full-trust guardian for Windows focused on the infostealer wedge — the credential-stealing malware that drives most account takeovers.
iPhone guardian
IN APP REVIEWAn iOS command center that watches for the signals of a cloned or compromised phone — the origin threat RankShield was built to stop.
Android guardian
COMING SOONA native Android guardian on the same RankShield Network, watching for malicious apps, network attacks and account-takeover signals.
Linux guardian
EARLY ACCESSA kernel-grade guardian for Linux servers and desktops built on Go and eBPF, for visibility other tools cannot reach.
Browser guardian
COMING SOONA Chrome guardian that closes the "browser is a trusted process" blind spot — where cookie theft, malicious extensions and OAuth abuse now happen.
Nothing here is oversold: early access means real but still hardening; coming soon means in development, not shipped.
How is a device guardian different from antivirus?
The difference is what they watch. Antivirus asks "is this file on my list of known-bad files?" — a model that made sense when malware was distributed as recognizable files, but that fails against anything new, fileless, or built from legitimate tools. A device guardian asks a harder, more useful question: "is this device behaving with integrity?" It watches which processes persist across reboots, what quietly talks to the network, whether your device identity and credentials are intact, and whether an app is exfiltrating data it has no reason to touch. That behavioral, integrity-first approach catches the threats that dominate today — infostealers assembling stolen credentials, spyware persisting silently, a cloned identity operating off-device, command-and-control beacons hiding in normal traffic. RankShield adds two things a standalone scanner cannot: the RankShield Network, so a pattern seen on one device immediately informs all of them, and verifiable records, so what the guardian found is evidence you can inspect rather than a reassuring word. Antivirus tells you a file was bad; a guardian tells you your device is — or isn't — still yours.
How does RankShield protect against phone cloning and SIM swaps?
By watching the identity signals an attacker cannot fully hide, even though the attack happens off your device. Phone cloning and SIM swapping are dangerous precisely because they don't require malware on your handset — an attacker convinces a carrier to move your number, or duplicates the identifiers that authenticate your device, and suddenly your calls, texts and two-factor codes flow to them. The first sign is often subtle: a sudden loss of signal, a login you didn't perform, a 2FA prompt you didn't request. RankShield's iPhone guardian is built for this exact scenario — the one that started the company. It monitors for the anomalies that accompany a clone or SIM swap: unexpected device-identity keys, network and carrier irregularities, and the account-takeover patterns that follow, correlating them against the RankShield Network so a technique used against one person is recognized when it targets the next. When the signals line up, it alerts you fast, because minutes matter in a SIM-swap attack. It cannot, and does not claim to, prevent a carrier from being socially engineered — no app can — but it can make sure you find out immediately and have a verifiable record of what happened, instead of discovering it when your accounts are already gone.
Ask RankShield about device security.
What is a device guardian?
A device guardian is deep, always-on security software that protects a device below the surface — watching processes, persistence, network behavior and identity signals, not just scanning files for known viruses. RankShield Device Guardian protects Macs, Windows PCs, iPhones, Android phones and Linux systems on one network, hunting the modern threats that evade ordinary antivirus — device clones, spyware, infostealers and command-and-control channels — and proving what it found with verifiable records.
How do I know if my phone has been cloned?
Signs include your phone losing signal unexpectedly (a possible SIM swap), messages or calls you did not make, being logged out of accounts, or two-factor codes you did not request. Cloning is hard to spot manually because it happens off-device. RankShield’s iPhone guardian watches the signals that indicate a clone or SIM swap — unexpected identity keys, network anomalies, and account-takeover patterns — and alerts you, because protecting the person’s device is the origin of why RankShield exists.
What is an infostealer, and why does it matter?
An infostealer is malware that quietly harvests saved passwords, session cookies, crypto wallets and autofill data from a device, then sends them to an attacker who uses them to take over accounts — often without ever needing your password again, because stolen session cookies bypass logins. Infostealers are behind a large share of modern account takeovers. RankShield’s Windows guardian targets this wedge specifically, detecting the credential-theft behavior rather than waiting for a known signature.
Which devices does RankShield Device Guardian support?
RankShield is building guardians for macOS, Windows, iPhone, Android, Linux and the browser, all on one RankShield Network. Status is honest and varies by platform: the macOS and Linux guardians are in early access, the iPhone app is in App Store review, and the Windows, Android and browser guardians are coming soon. We label each platform’s real status rather than implying everything ships today, because a company built on verifiability has to be honest about its own state.
How is Device Guardian different from antivirus?
Traditional antivirus matches files against a database of known malware, which misses anything new or fileless. A device guardian watches behavior and integrity: what processes persist, what talks to the network, whether your device identity is intact, whether an app is quietly exfiltrating data. RankShield combines that behavioral, integrity-focused approach with the RankShield Network — so an attack pattern seen on one device informs protection on all of them — and records what it found as verifiable evidence.
Does Device Guardian protect my privacy?
Yes — the guardian runs to protect you, not to surveil you. It focuses on integrity and threat signals on your own device, and its findings are yours. RankShield’s design principle is proof over data collection: the value is in verifiable protection you can check, not in hoovering up personal information. Any cross-device intelligence is about attack patterns, not your private content.
Guard every device you own.
Deep protection for Mac, Windows, phone and Linux, on one verifiable network. Start with your most important device.