01 / DETECT
See the signal before it becomes noise.
Behavioral intelligence turns ordinary traffic into a living map of what is changing, where, and why.
AI defense, thoughtfully engineered
Fjornsen is a fully managed security layer for websites, customer data and the infrastructure around them — detection, hardening and response run by one team.

Command center // Live
Human judgment, amplified.
A complete security posture
From the first suspicious request to the final incident note, Fjornsen keeps every layer legible, responsive and ready to act.
01 / DETECT
Behavioral intelligence turns ordinary traffic into a living map of what is changing, where, and why.
02 / HARDEN
WAF policy, CSRF protection, secure headers, sanitization and rate controls operate as one disciplined layer.
03 / RESPOND
Prioritized incidents, response telemetry and owner alerts help your team act without losing the context.


Managed services
Delivered as a service — no hardware, no new hires, no guesswork. You get the outcome; we run the system behind it.
Continuous availability, TLS and header checks on a 30-second cycle with retained history.
Adaptive rate limiting, tar-pitting and dynamic rules applied before traffic reaches your origin.
Scheduled scanning, dependency review and prioritised remediation guidance for your stack.
Documented playbooks, containment support and a 72-hour breach notification commitment.
TLS 1.3 in transit, AES-256-GCM at rest, key rotation and least-privilege access by default.
IP reputation, dark-web credential exposure and correlated feeds folded into your defence posture.

Global coverage
Checks run from multiple regions so an outage in one place never masks a problem somewhere else. Every probe is timestamped, retained and reproducible.
99.99%
Target uptime
<10ms
Edge response
24/7
Signal coverage
AES-256
Data protection
How it works
Create your account and tell us the domains, endpoints and data stores in scope.
We fingerprint normal behaviour, grade your headers and TLS, and record the starting posture.
Policies, rate controls and header fixes are rolled out with a documented change record.
Continuous monitoring, monthly posture reporting and responsive escalation when it matters.

Human-centered defense
The service is built around the way a real operator thinks: what is happening, what matters now, and what should happen next.

Who we protect
PCI-DSS scope reduction and transaction fraud signals.
HIPAA-aligned safeguards and strict access auditing.
Bot mitigation, checkout abuse and credential stuffing defence.
Tenant isolation review, API abuse control and SOC 2 evidence.
Plans
Every plan includes encryption, monitoring history and a signed data processing agreement. No usage traps.
£249/ month
For a single production site that needs dependable cover.
£849/ month
For growing teams handling customer data at scale.
Custom
For regulated environments with formal assurance needs.
FAQ
No. Fjornsen operates from the edge and from outside-in monitoring by default. Deeper integrations are optional and always scoped in writing.
Baseline monitoring and TLS/header assurance are active within an hour of onboarding. Full WAF policy tuning typically completes inside five working days.
Telemetry is held in encrypted storage inside the EEA/UK. Any transfer outside that region relies on Standard Contractual Clauses with a transfer impact assessment.
Our ISMS is operated in alignment with ISO/IEC 27001:2022. Current certification status, the Statement of Applicability and sub-processor list are available under NDA.
Your next operating layer
Create your account and bring your website, security controls and operational context into one protected place.
Activate Fjornsen