Your Files. Locked Down. On Every Windows System You Own.
FileSure stops ransomware, catches data theft, and records every file operation — on legacy and modern Windows systems. Install it, open a Word file, and you'll see exactly what we mean.
Most security tools try to detect threats. FileSure prevents them.
Antivirus software, EDR platforms, and most DLP tools share the same fundamental flaw: they have to recognize a threat before they can stop it. That means a ransomware variant they haven't seen yet walks right past them.
FileSure works differently. It operates at the Windows kernel level, intercepting file operations before they happen. It doesn't need to recognize ransomware. It simply controls what's allowed to happen to your files — and blocks everything else.
No signatures. No updates required to stop the next zero-day. No waiting for someone else to catch up.
FileSure was built for organizations like yours
"We have a compliance requirement and need proper audit trails."
FileSure records every file operation — who accessed what, when, with which program — and keeps those logs tamper-proof. HIPAA, PCI DSS, FISMA, SOX, NERC-CIP, CJIS. We've seen them all.
"We're worried about ransomware but can't replace our older systems."
FileSure runs on everything across legacy and modern Windows systems. If your critical systems are locked to an older OS, we still have you covered — and we'll stop ransomware on those systems that modern tools won't even install on.
"We want to know if an employee is stealing data."
FileSure tracks exactly which files were copied to a USB drive, sent via webmail, or synced to Dropbox — in real time. You'll know who did it, when, and what they took.
"We've been told we need DLP but the enterprise options are overkill."
FileSure does what the big DLP platforms do, without the six-figure price tag, the six-month implementation, or the need for a dedicated security team to run it.
Pick the version that fits your situation
FileSure Defend
For organizations with IT staff and 20+ users
Full-featured. Fully configurable. Centrally managed from a single console that pushes policies to every protected machine. If you have Active Directory and someone on staff who owns IT, this is your product.
FileSure Cloud
For small businesses without dedicated IT staff
Pre-configured and ready in minutes. Register, download, install — and you're protected. No server required, no rules to write, no IT knowledge needed. You'll get email alerts when something happens.
FileSure for MSPs
For managed service providers
Plug into the RMM tools you already use. FileSure pushes alerts directly into ConnectWise, NinjaOne, Kaseya, Datto, and more. Priced by the rule, not by the seat — so your margins stay healthy.
20+ years. 200+ customers. Every industry you can think of.
ByStorm has been building file security software since 2003. FileSure has been deployed at Federal Reserve Banks, nuclear security facilities, regional hospitals, county governments, law firms, universities, and manufacturers on six continents.
We're not a startup with a promising pitch. We're a proven product that quietly does its job.
Try it before you buy it. We insist.
We'd rather you see FileSure working in your environment before spending a dollar. That's why the trial is fully functional — 1 server, 10 workstations, 21 days, no credit card required.
Install FileSure on your server
Quick installation, no complex configuration required.
Open a Word document on a workstation
Just open any file like you normally would.
Check the console — it's already recorded
That's it. That's the product working.
That's it. That's the product. Everything else is just deciding how much of it you want to use.
Start Your Free 21-Day TrialWhat are you trying to fix?
Ready to see FileSure in action?
Start your free 21-day trial today. No credit card required. Install it, open a file, see it recorded.
Start Your Free 21-Day Trial