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Lanmark Limited

Cyber security company London businesses trust for 24/7 protection

Lanmark is a specialist cyber security company serving London SMBs. Our service combines Managed Detection and Response (MDR), Identity Threat Detection and Response (ITDR), and 24/7 Security Operations Centre (SOC) monitoring in a single per-user service: enterprise-grade protection at a price that works for businesses of 20 to 500 users.

Cyber threats do not keep office hours. Our security analysts work around the clock, responding to incidents in real time and providing the assisted remediation your business needs to stay operational after an attack.

Book a free security consultation

Why choose a specialist cyber security company London businesses trust?

Lanmark is a cyber security company London businesses rely on for round-the-clock protection against modern threats. Unlike reactive IT support or basic antivirus tools, managed cyber security means having dedicated analysts monitoring your environment 24 hours a day, detecting threats before they cause damage and responding immediately when something goes wrong.

Our services cover the full threat landscape: Managed Detection and Response (MDR), Security Operations Centre (SOC) monitoring, Identity Threat Detection and Response (ITDR), phishing simulation, penetration testing, and Cyber Essentials certification, the UK government-backed standard for baseline cyber security controls. All services are priced per user, so costs stay predictable as your business grows.

As a cyber security company London SMBs trust, Lanmark holds the Microsoft Support Service Designation, an accreditation held by only a handful of companies worldwide, confirming the depth of our expertise across Microsoft 365, Azure, and security.

Regulated firms carry an extra layer of obligation on top of the technical controls. Where the requirement is FCA-facing, our IT support for financial services firms in London explains how the same monitoring and identity controls sit alongside the record-keeping and operational resilience expectations a regulated firm has to meet.

What a cyber security consultancy London businesses trust actually does

Most London SMBs rely on antivirus software and a firewall. That was adequate a decade ago. Today, the most damaging attacks, ransomware, credential theft and business email compromise, bypass these tools entirely because they target users and identities, not just devices.

As a cyber security consultancy London businesses trust, Lanmark combines three layers of protection that work together: MDR monitors your endpoints and devices, ITDR monitors your user identities and accounts in Microsoft 365 and Azure, and SOC analysts review every alert 24 hours a day and take action when a genuine threat is found.

The result is a security posture that would cost hundreds of thousands of pounds to build internally, delivered as a predictable per-user monthly service.

Our cyber security company London services

MDR

ITDR

SOC as a Service

Phishing Simulation and Security Awareness Training

Vulnerability Assessment and Penetration Testing

Cyber Essentials Certification

The cyber threat landscape

of successful attacks begin with a phishing email
SOC monitoring, every day of the year
average threat isolation response time

Why choose Lanmark as your cyber security company London?

Enterprise security at SMB pricing

Our MDR, ITDR, and SOC services are priced per user per month. No six-figure security budget required.

24/7 monitoring with human analysts

Cyber attacks happen at 2am on a Sunday as often as during business hours. Our SOC analysts review every alert around the clock.

Microsoft Support Service Designation

Lanmark holds the Microsoft Support Service Designation, held by only a handful of companies worldwide, confirming our expertise across Microsoft 365 and Azure security.

Human analysts, not just software

Every alert is reviewed by a qualified security analyst who provides judgement that automated tools cannot, and takes action when it matters.

Free security assessment

We offer a no-obligation security assessment for London businesses, reviewing your current posture and identifying gaps at no cost.

Integrated with your IT support

Lanmark’s cyber security services integrate fully with our managed IT support. One provider, one bill, one point of contact.

Cyber security questions London businesses ask us

Antivirus software scans for known malicious files and blocks them automatically. MDR goes much further. It uses behavioural analysis to detect unusual activity and combines that with human security analysts who review alerts 24/7 and actively respond to threats.

Microsoft 365 includes baseline security tools, but they generate alerts that require human review. Our managed cyber security service provides the layer of human expertise that makes your existing Microsoft investment effective. This same security baseline underpins our AI consultancy work, including Microsoft 365 Copilot deployments and AI governance reviews using Microsoft Purview.

Cyber Essentials is a UK government-backed certification covering five core security controls. It is mandatory for UK government contracts and increasingly required by insurers and enterprise clients. We guide London businesses through assessment to certification.

Lanmark prices cyber security on a per-user, per-month basis. The exact cost depends on services required and user count. We provide a fixed quote following a free security assessment with no hidden costs.

If your business is currently under attack, call us immediately on +44 207 123 4910. Our SOC provides emergency incident response to London businesses. For Lanmark managed cyber security clients, incident response is included as standard.

Lanmark specialises in London SMBs of 20 to 500 users: professional services, legal, financial services, and operations-led businesses that handle sensitive data without an in-house security team.

Talk to a cyber security consultancy London businesses rely on

Lanmark provides specialist managed cyber security services to London businesses. Book a free security consultation and we will assess your current posture, identify the gaps, and explain exactly what protection you need, with no commitment required.

Book a free security consultation
Call us: +44 207 123 4910