We believe every small business deserves enterprise-grade cybersecurity — not watered-down tools, not confusing dashboards, and not a monthly invoice for something they don't understand. Just protection that works, managed by people who care.
Small and mid-size businesses face the same threats as large enterprises — ransomware, phishing, business email compromise, zero-days — but without the IT teams, security budgets, or in-house expertise to defend against them.
Perimetra was built to close that gap. We specialize in two things: stopping threats at the endpoint with AI-powered detection and response, and stopping threats at the inbox with a real-time email security gateway. Both fully managed. Both built for businesses that don't need — and shouldn't need — a dedicated IT security team.
99.9%
Platform uptime SLA
<2hr
P1 incident response
48hrs
Typical deployment
$4/mo
Email security starting price
$7/mo
EDR starting price
0
Breaches on protected clients
The Problem We Saw
60%+
Of all cyberattacks target small businesses
$120K
Average cost of a single SMB data breach
197 days
Average breach detection time without EDR
91%
Of breaches begin with a phishing email
<5%
Of SMBs have enterprise-grade endpoint protection
When we looked at the cybersecurity market, we saw the same pattern everywhere: enterprise tools too complex and expensive for small businesses, and consumer tools too weak to stop modern threats.
Small businesses were being left in the middle — expected to protect themselves with antivirus software built for a threat landscape that no longer exists.
We built Perimetra to deliver the two most impactful layers of protection — endpoint detection and email security — in a fully managed package that any business can afford and no IT team is required to run.
Everything we do is measured against one standard: did we stop the attack before it hurt the business? That's the only metric that matters.
Six principles that guide every decision we make — from how we build our product to how we support our clients.
You always know what we found, what we did about it, and exactly how your business is protected. Every monthly report is written in plain English — no jargon, no buzzwords.
Threats don't wait for approval workflows. Our automated response isolates attacks in milliseconds. Our deployment gets you protected in 48 hours. Speed is a security feature.
Your dedicated partner rep is a real person who knows your business — not a support ticket number, not a chatbot. They're a security advisor who picks up the phone.
Every monthly threat report is a proof point — showing the exact threats caught, the actions taken, and the value delivered. If we're not delivering value, you'll see it.
Enterprise-grade protection designed for businesses without dedicated IT security teams. No complex dashboards to monitor, no training required, no new headcount needed.
Our AI models are updated daily with the latest threat intelligence. A threat blocked for one client makes every client safer.
Perimetra focuses on the two attack surfaces responsible for over 95% of all successful breaches — endpoints and email.
AI-powered behavioral analysis stops ransomware, fileless attacks, and zero-days that traditional antivirus misses — with automated containment before threats can spread.
✓ Behavioral AI threat detection
✓ Automated host isolation
✓ Multi-tenant dashboard
✓ Monthly branded threat reports
✓ Managed threat hunting
✓ HIPAA and PCI-DSS compatible
Learn About EDRA real-time email gateway that stops phishing, BEC, malware attachments, and impersonation attacks before they reach your team's inbox.
✓ Real-time phishing detection
✓ Attachment sandboxing
✓ URL rewriting and click protection
✓ BEC defense
✓ Spam and malware filtering
✓ Near-zero false positive rate
Learn About Email SecurityDeep experience protecting businesses where data sensitivity and compliance pressure make security non-negotiable.
Dental offices, clinics, and medical practices. HIPAA-compatible endpoint and email protection.
HIPAA CompatibleLaw firms and solo practitioners. Protect privileged client files and stop BEC wire fraud.
ABA Guidance AlignedAccountants, bookkeepers, and financial advisors. Stop wire fraud and meet PCI-DSS requirements.
PCI-DSS CompatibleAny business with 10-500 employees that holds sensitive data or handles client information.
All Industries“
Perimetra stopped a ransomware attack on a Friday afternoon before anyone on our team knew it was happening. The automated report the next morning showed exactly what occurred. That alone paid for years of service.
David M.
Managing Partner, Regional Law Firm
“
We switched from basic AV and within the first week Perimetra caught three credential phishing attempts targeting our billing team. Our cyber insurer reduced our premium after seeing the EDR coverage.
Sandra C.
Practice Manager, Dental Group (14 locations)
“
The email security gateway alone was worth it. BEC attempts were coming in weekly targeting our finance team. Now they never see them. Setup took less than two hours.
Thomas R.
CFO, Accounting Firm (80 staff)
Book a free 20-minute security assessment and speak directly with a Perimetra security expert — no sales scripts, just straight answers.