Defence Logic
Defence Logic is a Jersey-headquartered boutique cybersecurity firm offering penetration testing, a proprietary SIEM with 24/7 SOC, ISO 27001 consulting, and Virtual CISO services to regulated enterprises across legal, financial services, BPO, and government verticals in the UK and Channel Islands.
- Company typePrivate
- Founded2017
- HeadquartersSt. Helier
- Headcount1–10
- GTM typeB2B
- OfferingServices
What Defence Logic does
Defence Logic Limited is a boutique cybersecurity services firm headquartered in St. Helier, Jersey, with a second office in Bristol, UK. The company delivers a portfolio of managed security services built around its proprietary DefenceLog SIEM platform, which integrates the MITRE ATT&CK framework, custom detection rules, and risk scoring, supported by a 24/7 Security Operations Centre. Its service lines span penetration testing (network, web application, social engineering, Wi-Fi, IoT), ISO 27001 implementation and certification consulting, and Virtual CISO engagements on flexible monthly or multi-day-per-week arrangements. Pricing is largely quote-based, with fixed annual pricing available for SIEM subscriptions and multi-year contracts for vCISO work.
The company targets enterprise and mid-market clients across regulated verticals — notably legal services (including private equity due diligence use cases), financial services (fiduciary, accounting, investment firms), business process outsourcing, and government/quasi-government bodies in the Channel Islands. Disclosed engagements range from a 100-user Jersey fiduciary firm to a 10,000+ user global BPO spanning four continents, with event volumes up to 20 million events per day. Customer evidence is concentrated in the UK and Channel Islands, with select cross-border references to Asia, North America, and Africa via BPO engagements.
The go-to-market is consultative direct enterprise sales, supplemented by content marketing (blog, webinars, case studies) and a LinkedIn presence. The team comprises five named senior practitioners with CHECK, CISSP, CISA, and C|CISO credentials, led by CEO Anthony Flemmer and Chairman Alex Brunwin. Defence Logic is privately held with no disclosed external investors, funding rounds, or M&A activity, and no public financial metrics are available.
Defence Logic firmographics
Firmographics- Name
- Defence Logic
- Legal name
- Defence Logic Limited
- Website
- https://defencelogic.io
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Defence Logic is a Jersey-headquartered boutique cybersecurity firm offering penetration testing, a proprietary SIEM with 24/7 SOC, ISO 27001 consulting, and Virtual CISO services to regulated enterprises across legal, financial services, BPO, and government verticals in the UK and Channel Islands.
- Ownership category
- akta.pro rank
Where Defence Logic is headquartered
LocationHeadquarters
- HQ city
- St. Helier
Offices2 records
Markets served
Defence Logic business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales
Revenue model
- Security Testing Services: One-time and recurring penetration testing services including network security, web application, social engineering, Wi-Fi, and IoT security testing. Services can be combined or undertaken separately as part of a security testing consultation process.
- SIEM & SOC Managed Services: Managed security monitoring services with 24/7 SOC coverage. Fixed pricing model available. Includes integration, configuration, tuning, training, and ongoing monitoring. Subscription-based recurring revenue model.
- Virtual CISO Services: vCISO engagements following assess, plan, and remediate cycle. Flexible arrangements from monthly/quarterly guidance to hands-on help several days per week. Cost-effective alternative to full-time CISO.
- ISO27001 Consulting: Implementation and certification support for ISO 27001 standard. Services include gap analysis, risk assessment, documentation development, and training. Helps organizations achieve and maintain certification.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Fixed-price SIEM model |
| Other | Multi-year contract | Flexible vCISO arrangements |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels5 records
Defence Logic product offering
Product offeringCore offering
Defence Logic is a boutique cybersecurity firm providing penetration testing (network, web application, Wi-Fi, IoT, social engineering), 24/7 SIEM and SOC managed monitoring built on its proprietary DefenceLog SIEM platform, ISO 27001 implementation and certification support, and Virtual CISO advisory services. It sells these integrated cybersecurity services primarily to enterprise and mid-market clients in legal, financial services, and regulated industries across the UK, EMEA, and select global markets.
Product overview
Defence Logic is a cybersecurity firm offering a portfolio of managed security services. The core offering is built around the DefenceLog SIEM platform complemented by 24x7 SOC monitoring services, alongside penetration testing, ISO 27001 implementation, and Virtual CISO services. These services work together as an integrated cybersecurity programme covering threat detection, security testing, compliance, and strategic security leadership.
Differentiator
Problem solved
Functional benefit
Products and services
- Penetration Testing
Quantifiable outcome
- 100% of externally exploitable vulnerabilities eliminated within 30 days
- +5 more outcomes
Companies that use Defence Logic
Customer profileNamed customers10 records
Segments4 records
Ideal customer profiles4 records
Defence Logic technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Defence Logic partnerships and signals
Strategic signalScale indicators7 records
Recent moves5 records
Expansion highlights4 records
Defence Logic competitors and assessment
Company assessmentBroad incumbents
- Trustwave: Global managed security services provider offering SIEM/SOC, penetration testing, and consulting. Larger-scale incumbent operating broadly in the same cybersecurity services space with a wider service portfolio than Defence Logic.
- WithSecure (formerly F-Secure): European-headquartered cybersecurity vendor offering managed detection and response, penetration testing, and consulting with a broader portfolio of products. Comparable as a larger, established player with overlapping MSSP and consulting capabilities across European enterprise.
- Deloitte Cyber Risk Services: Big 4 firm's cybersecurity practice offering penetration testing, managed security services, ISO consulting, and Virtual CISO services globally. Operates in the same broad space, often competing directly for the same regulated-enterprise and financial-services clients (e.g., Channel Islands Financial Ombudsman).
- Sophos: UK-based cybersecurity vendor providing managed detection and response (Sophos MDR), endpoint protection, and partner-delivered security services. Larger incumbent overlapping in managed SOC and security services delivery to mid-market.
Direct peers
- Secarma: UK-based penetration testing and cybersecurity consultancy specializing in ethical hacking, application security, and managed security services. Comparable as a similarly positioned UK boutique offering pen testing as a core service line with enterprise and mid-market reach.
- eSentire: Managed Detection and Response (MDR) provider with 24/7 SOC, proprietary detection rules, and endpoint-to-network threat coverage. Comparable as a managed security firm emphasizing 24/7 monitoring and incident response for mid-market and enterprise clients.
- Bridewell: UK cybersecurity consultancy providing managed detection and response, penetration testing, and cyber advisory services. Closely comparable in business model—senior practitioner-led consulting plus managed SOC—and target market of regulated UK enterprises.
- NCC Group: UK-based cybersecurity services firm offering penetration testing, managed security services, and ISO compliance consulting. Directly comparable as a UK-rooted cybersecurity services provider serving enterprise and mid-market clients with a similar boutique-to-mid-tier service mix.
- Cyberis: UK-based cybersecurity firm focused on penetration testing, red team engagements, and managed security services. Similar boutique service mix and senior-led delivery model across UK regulated industries.
Emerging players
- Arctic Wolf: Fast-growing MDR/SOC provider with subscription-based managed security operations and concierge delivery model. Similar managed SIEM/SOC value proposition and fixed-pricing approach, though larger and venture-backed.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
Defence Logic social profiles
Digital presenceDefence Logic financial estimates
Financial estimateRevenue estimate
Valuation estimate
Defence Logic leadership team
Management profileNumber of profiles
Profiles5 records
Defence Logic funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Defence Logic M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Defence Logic
What does Defence Logic do?
Defence Logic is a boutique cybersecurity firm providing penetration testing (network, web application, Wi-Fi, IoT, social engineering), 24/7 SIEM and SOC managed monitoring built on its proprietary DefenceLog SIEM platform, ISO 27001 implementation and certification support, and Virtual CISO advisory services. It sells these integrated cybersecurity services primarily to enterprise and mid-market clients in legal, financial services, and regulated industries across the UK, EMEA, and select global markets.
Is Defence Logic a public or private company?
Defence Logic is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Defence Logic founded?
Defence Logic was founded in 2017. It employs 1 to 10 people.
Where is Defence Logic based?
Defence Logic is headquartered in St. Helier.
How does Defence Logic make money?
Four revenue lines are on record. Security Testing Services are the primary driver. The others are SIEM & SOC Managed Services, virtual CISO Services and ISO27001 Consulting.
Who are Defence Logic's main competitors?
Broad incumbents on record are Trustwave, WithSecure (formerly F-Secure), Deloitte Cyber Risk Services and Sophos. Direct peers are Secarma, eSentire, Bridewell, NCC Group and Cyberis. Arctic Wolf is listed as an emerging player.
Does Defence Logic have an API?
No public API is recorded for Defence Logic.