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Buying guide

How to choose a cyber security
company in London.

By Cyber Security London · · 2 min read

In short

Choose a cyber security company that starts by understanding your business, explains its findings in plain English, gives fixed quotes after scoping, and can show relevant experience. Ask how they test, who does the work, what you get at the end and what happens in an emergency. Avoid anyone who leads with fear or a product to sell.

What should a cyber security company do for you?

A good partner helps you understand your risks, fixes the ones that matter most, watches for attacks and helps you respond when something goes wrong. For most small and medium businesses that means a mix of:

  • an assessment to find the biggest risks,
  • testing (vulnerability scanning and penetration testing),
  • monitoring and incident response,
  • staff training, and
  • help with standards such as Cyber Essentials or ISO 27001.

What questions should you ask?

AskWhy it mattersA good answer sounds like
How do you scope the work?Vague scope means vague results and surprise costsA written scope and a fixed quote before work starts
Who will do the work?Some firms resell automated tools as “testing”Named, experienced people, with manual testing where it counts
What will we get at the end?A report you can't act on is wasted moneyA short summary for leaders plus clear, ordered fixes
What happens in an emergency?Incidents rarely happen in office hoursA clear contact route and agreed response steps
Can you help with certification?Clients and tenders often require itHonest help to prepare, with certificates from licensed bodies
Which accreditations do you hold?Some contracts require specific onesA straight answer you can verify

What are the red flags?

  • Fear-led selling: scare stories instead of a clear view of your actual risk.
  • Product first: recommending tools before understanding how you work.
  • No written scope or a price that seems too good to be true.
  • Jargon-heavy reports with no prioritised actions.
  • Unverifiable claims about clients, awards or accreditations.

Should you choose a local London provider?

Much cyber security work can be done remotely, but a London-based team can meet you, run workshops on site and attend quickly in person if an incident needs it. For many businesses that relationship makes communication easier and faster.

Frequently asked questions

It depends on the services and the size of your business. Assessments, audits and tests are usually fixed price after scoping; monitoring and training are typically monthly or per person.

Most benefit from some outside help. The UK government's 2025 survey found 43% of businesses identified a breach or attack in the previous year, and small firms rarely have specialist staff in-house.

An IT provider keeps systems running day to day. A cyber security company focuses on finding weaknesses, preventing attacks and responding to them, and can independently check the work of your IT provider.

Sources

  1. Cyber Security Breaches Survey 2025, Department for Science, Innovation and Technology
  2. Small Business Guide, National Cyber Security Centre
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