Protection and support for Home and Business
Protect what matters. Get help when you need it.
Choose Email Security, Antivirus, and real-time Tech Support for the inboxes and computers you want CloudCastle to protect.
Built and staffed in the United States
What CloudCastle is
Security and maintenance software for your computers
CloudCastle is a subscription service for households and businesses. Choose the services you need, then connect inboxes or install our app on the computers you own. CloudCastle can block viruses and attacks, protect email from scams, keep computers updated, and connect you with a technician.
If you sign in with Google or Microsoft, we use that access to confirm your identity and authenticate your account. We process your name and email address, and share service data only with the processors and IT provider needed to deliver your service. We access mailbox content only when you connect Email Security. See exactly what we collect, why, and who receives it in our Privacy Policy, and the rules of the service in our Terms of Service.
How it works
Three steps, then it runs itself
No server to set up and nothing to check every morning.
Install the app
A few minutes per computer. It works on Windows, Mac, and Linux.
We keep an eye on things
Threats, updates, and computer health — checked around the clock.
You are never stuck
Questions about the app are always free. Want a technician to fix the computer itself? Add that on.
What we do
What we watch for you
One app on every computer, quietly doing the work.
We detect scam emails
Gateway deployments can block them before delivery; connected mailboxes detect and quarantine them after delivery.
Explore Email Security
We block dangerous sites
Fake shops, fake logins, and infected pages never open.
We keep everything updated
Apps stay current and your computer stays tidy automatically.
We show our work
Every fix records what changed, when, and on which computer.
Email security
Scam email gets detected and contained
Most break-ins start with one convincing email — a fake invoice, an executive in a hurry, a QR code on a flyer. CloudCastle analyzes it in the protection mode connected to your mail.
- Inline SMTP gateway mode can reject or quarantine threats before delivery where deployed
- Connected mailbox mode scans new mail after delivery and moves detected threats into quarantine
- Invoice fraud, executive impersonation, brand lookalikes, QR phishing, links and attachments are analyzed
- Links can be re-checked at click time when URL defense is enabled
- Quarantined messages can be reviewed and released
Mailbox connections preserve the existing mail provider and provide post-delivery, IMAP-assisted detection. Pre-delivery blocking requires an inline SMTP gateway deployed for the business domain by a technician.
Why it works better
Not the antivirus you grew up with
Older tools only recognize threats someone has already cataloged, and they still need a person to clean up. Ours watches how software behaves and acts on its own.
The old way
- Matches a list of threats already known
- Brand-new attacks get through until the list catches up
- Tells you something is wrong, then waits for you
- A separate tool for updates, and another place to get help
CloudCastle
- Watches how programs behave, so new attacks stand out
- Stops ransomware while it runs and supports guided, authorized recovery
- Applies permitted fixes and records what changed
- Updates, security, and real-time help work together
Who it's for
Two ways to use one app
Choose Home or Business, then pick the same three services.
Tech Support
A real person when your computer needs help
Real-time Tech Support covers every enrolled endpoint. Routine upkeep happens quietly, and a technician in the United States can connect with your permission when a computer problem needs a person.
Choose Tech Support on its own or alongside Email Security and Antivirus. Nobody connects until you approve it.
Start with the computers you already have
Home and Business accounts both start online. Choose any combination of Email Security, Antivirus, and Tech Support.