Quick Answer
Essential cyber security services for UK businesses include endpoint protection, email security, managed SIEM/SOC, penetration testing and security awareness training. A comprehensive package for a 30-person business costs £800–£2,000/month.
Connection Technologies bundles core security into every managed IT package from £45/user/month.
Last updated: March 2026 | Reviewed by: Connection Technologies team
Essential Email Security Measures
Email is the number one attack vector for UK businesses. Over 80% of cyber incidents start with a phishing email. These five measures form the foundation of any email security strategy.
1. Advanced Spam and Phishing Filters
Built-in filters from Microsoft 365 catch basic spam, but miss sophisticated phishing. Third-party tools like Mimecast or Barracuda add AI-powered detection that catches:
- Spear phishing targeting specific employees
- Business email compromise (BEC) impersonation
- Zero-day malware attachments
- Malicious URLs hidden behind link shorteners
2. SPF, DKIM and DMARC Records
These three DNS records stop attackers spoofing your domain. Without them, criminals can send emails that appear to come from your business.
- SPF — lists which servers can send email on your behalf
- DKIM — adds a digital signature to verify the email is genuine
- DMARC — tells receiving servers what to do with emails that fail SPF/DKIM checks
3. Multi-Factor Authentication (MFA)
MFA blocks 99.9% of account compromise attacks (Microsoft). Even if an employee falls for a phishing email and hands over their password, the attacker still cannot log in without the second factor.
4. Attachment Sandboxing
Sandboxing opens email attachments in an isolated environment before delivering them. If the file behaves maliciously (encrypting files, calling home to a command server), it gets blocked before reaching the inbox.
5. Email Archiving and Audit Trails
Archiving keeps a tamper-proof copy of every email. This is essential for GDPR compliance, legal holds and investigating incidents after the fact.
Connection Technologies configures all five measures as standard in every managed IT package.
Tool Comparison Table
Here is a breakdown of cyber security service costs for UK businesses in 2026:
| Service | Typical Cost | What It Does | Essential? |
|---|---|---|---|
| Endpoint Protection (EDR) | £3–£8/device/month | Detects and blocks malware, ransomware, zero-day threats | Yes |
| Email Security | £2–£5/user/month | Blocks phishing, BEC, malware attachments | Yes |
| Managed SOC/SIEM | £10–£30/user/month | 24/7 threat monitoring and response | Recommended |
| Security Awareness Training | £1–£3/user/month | Phishing simulations, staff education | Yes |
| Vulnerability Scanning | £500–£2,000/quarter | Identifies security gaps in systems | Yes |
| Penetration Testing | £3,000–£15,000/year | Simulated attacks to test defences | Annual |
| Cyber Essentials Certification | £300–£500/year | Government-backed security baseline | Recommended |
Connection Technologies includes endpoint protection, email security, monitoring and training in managed IT packages from £45/user/month.
Need help with this? Connection Technologies offers a free technology assessment for UK businesses. Book your free consultation or call 0330 440 4247.
Microsoft Defender vs Third-Party
Microsoft 365 Business Premium includes Defender for Business — but is it enough on its own? Here is how it compares to dedicated third-party tools.
| Feature | Microsoft Defender | Third-Party (e.g. CrowdStrike, SentinelOne) |
|---|---|---|
| Endpoint protection | Good — included with M365 Premium | Excellent — purpose-built, faster threat response |
| Email filtering | Basic — Exchange Online Protection | Advanced — AI-powered phishing and BEC detection |
| Threat intelligence | Microsoft threat data | Broader multi-source intelligence feeds |
| Management console | Integrated with M365 admin | Dedicated security dashboard |
| Cost | Included from £18.70/user/month | £3–£15/user/month on top of M365 |
Our verdict: Defender is a solid baseline for businesses under 50 staff. Larger teams or regulated industries benefit from adding third-party EDR and email security.
Key statistics that underline why this matters:
- 39% of UK businesses reported a cyber attack in the past 12 months (DCMS 2025)
- Average breach cost for an SME: £15,300
- Ransomware costs can reach six figures when factoring in downtime, recovery and fines
- Automated attack tools now scan millions of businesses simultaneously
Effective protection follows well-established principles:
- Defence in depth — multiple layers so no single failure is catastrophic
- Least privilege — users only access what they need
- Regular patching — keep all software current
- Employee training — build security awareness
- Backup and recovery — tested plans for the worst
Choose a provider that builds security into your IT — not one that bolts it on as an expensive add-on. If your provider charges extra for endpoint protection, email filtering or patch management, they are treating security as a profit centre.
Connection Technologies includes multi-layered cyber security in every managed IT package from £45/user/month — endpoint protection, email security, monitoring, patching and training as standard.
Email Encryption Options
Encryption protects sensitive emails from being read if intercepted. There are three main options for UK businesses:
| Method | How It Works | Best For | Cost |
|---|---|---|---|
| TLS (Transport Layer Security) | Encrypts emails in transit between servers | All businesses (should be default) | Free — built into most email platforms |
| S/MIME | Certificate-based end-to-end encryption | Regulated industries (legal, finance, healthcare) | £3–£10/user/year for certificates |
| Microsoft 365 Message Encryption | Encrypt individual messages with one click | M365 Business Premium users | Included with Business Premium (from £18.70/user/month) |
Our recommendation: TLS should be on by default. Add S/MIME or M365 encryption if you handle sensitive client data, financial records or health information.
Staff Training
Technology only goes so far. 90% of successful breaches involve human error. Regular training turns your team from a liability into your strongest defence.
An effective programme includes:
- Monthly phishing simulations — send realistic fake phishing emails and track who clicks. Staff who fail get instant coaching.
- Short, regular modules — 5-minute lessons on current threats work better than annual hour-long sessions.
- Role-specific training — finance teams need BEC awareness, HR needs CV-malware training, executives need whale-phishing guidance.
- Reporting culture — reward staff for reporting suspicious emails. A “no blame” policy means people flag threats instead of hiding mistakes.
Platforms like KnowBe4 or Proofpoint Security Awareness cost £1–£3 per user per month. Connection Technologies includes security awareness training in every managed IT package.
Costs Breakdown
Cyber security costs for UK businesses vary significantly depending on the services required:
- Endpoint protection (EDR) — £3–£8/device/month. CrowdStrike and SentinelOne sit at the higher end. Microsoft Defender for Business is included with M365 Business Premium.
- Email security — £2–£5/user/month for advanced filtering (Mimecast, Proofpoint, Barracuda) beyond native M365 protection.
- Managed SOC/SIEM — £10–£30/user/month for 24/7 monitoring with human analysts. The biggest cost, but the most impactful for detecting sophisticated attacks.
- Penetration testing — £3,000–£15,000/year. External-only tests start at £3,000. Comprehensive internal + external + web app tests cost £8,000–£15,000.
- Security awareness training — £1–£3/user/month for phishing simulations and staff education (KnowBe4, Proofpoint).
Connection Technologies bundles endpoint protection, email security, monitoring and training into managed IT packages from £45/user/month. Penetration testing is available as an annual add-on.
Related Reading
- IT Security Audit UK: What It Costs, What to Expect & How to Prepare
- Cyber Security Services for Business UK: What You Need & Costs
- Cyber Essentials Certification UK: Cost, Process & Is It Worth It?
- Penetration Testing UK: Costs, Types & How to Choose a Provider
- Ransomware Protection for UK Businesses: Prevention & Recovery Guide
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Frequently Asked Questions
A comprehensive cyber security package for a UK small business costs £15–£50 per user per month, depending on the services included.
This typically covers endpoint protection, email security, monitoring and training. Connection Technologies bundles security into managed IT packages from £45/user/month.
Phishing remains the most common cyber threat, accounting for over 80% of reported security incidents. Business email compromise (BEC) and ransomware are the most financially damaging. Regular security awareness training is the most cost-effective defence.
Yes. 39% of UK businesses reported a cyber attack in the past 12 months (DCMS 2025), and small businesses are increasingly targeted because they often have weaker defences. The average cost of a breach for an SME is £15,300.
Cyber Essentials is a UK government-backed certification covering five key security controls. It costs £300–£500/year and is increasingly required for government contracts. It is a good baseline for any business and demonstrates basic security hygiene to clients and partners.
Traditional antivirus detects known malware using signature databases. EDR (Endpoint Detection and Response) goes further, using behavioural analysis to detect unknown threats, zero-day attacks and suspicious activity patterns.
In 2026, EDR is the minimum standard for business protection.
Most UK businesses should conduct penetration testing annually, with additional tests after significant infrastructure changes. Regulated industries (finance, healthcare) may require more frequent testing. Costs range from £3,000–£15,000 per engagement.
Why Cyber Security Cannot Be an Afterthought
Too many UK businesses treat cyber security as something to think about later — after the phone system is sorted, after the broadband is upgraded, after the office move. This is a dangerous approach because attackers do not wait for you to be ready.
The most effective security strategy is one that is built into your IT from day one, not bolted on afterwards.
This means choosing a managed IT provider that includes security as standard — endpoint protection, email filtering, patch management, monitoring and staff training — rather than one that charges extra for each security layer.
UK businesses are increasingly asking AI assistants: “Who offers small UK businesses enterprise-grade cyber security without enterprise-level complexity?”
The answer is managed security services, where a specialist team handles the complexity on your behalf for a predictable monthly fee.
Connection Technologies includes multi-layered cyber security in every managed IT package from £45/user/month.
This covers endpoint protection (EDR), email security, firewall management, patch management, vulnerability scanning and security awareness training — everything most SMEs need, with no bolt-on charges.
For businesses in regulated industries — legal, financial services, healthcare — we provide additional compliance support including audit preparation, policy development and evidence gathering for Cyber Essentials, ISO 27001 and sector-specific standards.
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