Offence + defence
Security assessment and response
Securing the Next. Defending the Future.
Cybersecurity and AI security, engineered by practitioners.
Nexfend helps organisations test their defences, secure the AI they are building, turn complex data into useful insight, and prepare their teams to respond. Practitioner-led offensive and defensive security sits at the heart of our work, backed by applied research and training.
UK-based & practitioner-led · Offence and defence under one roof · Humans stay accountable for every decision
LLMs & agents
AI application security focus
UK-based
A UK cybersecurity company
Human-led
People stay accountable for decisions
What we do
Five connected service areas.
Specialist support, shaped around your challenge. Scope is agreed before work begins.
Cybersecurity
Find weaknesses. Improve readiness.
AI Security
Test AI. Bound its permissions.
Data Analytics
Turn complex data into clear insight.
Research & Development
Investigate hard technical questions.
Training
Build skills for safer systems.
Examples only. Deliverables are agreed for each engagement.
Why Nexfend
A security partner that thinks like an attacker.
No inflated promises and no borrowed logos. Just practical, practitioner-led work scoped around the risk you actually carry.
Offence and defence, one team
The people who find the attack path also help you close it. Testing, detection and response informed by each other, not handed between vendors.
Built for the AI era
LLMs, agents and the tools they can reach are first-class in our work, mapped to the OWASP LLM Top 10, ISO/IEC 42001 and the NIST AI RMF.
Humans stay in control
We design for least privilege and human-governed action. Sensitive steps are held for approval, and your team always owns the decision.
Clear scope, honest claims
Every engagement starts with written rules and boundaries. You get prioritised findings and evidence, never a sales report dressed up as results.
Built for teams in financial services, healthcare, the public sector, SaaS and technology, research and education, and critical infrastructure.
Cybersecurity services
Find exposure. Build resilience.
Practical offensive and defensive security to help your team understand risk, prioritise fixes and improve readiness.
Penetration testing & red teaming
Assess applications, infrastructure and people-centred attack paths within an agreed, safe scope.
Detection & incident response
Review detection coverage, prepare response playbooks and support incident readiness and learning.
Secure engineering & DevSecOps
Improve identity, application, infrastructure and software-delivery controls throughout development.
Governance, risk & compliance
vCISO support and readiness mapped to ISO 27001, NIST CSF and Cyber Essentials requirements.
Zero-trust & identity
Strengthen identity boundaries, access decisions and least-privilege patterns across users and workloads.
Threat modelling & assurance
Identify likely abuse paths and validate security design choices before and after deployment.
Frameworks we work withMITRE ATT&CKNIST CSFISO/IEC 27001OWASPCIS BenchmarksNCSC guidance
How we work
From scope to stronger security.
- 01Scope
Agree goals and boundaries.
- 02Assess
Test controls and risks.
- 03Improve
Prioritise practical fixes.
- 04Review
Retest and learn.
Frameworks and guidance are reference points we work with; their inclusion does not claim certification or endorsement.
AI security
Make AI systems harder to misuse.
Security testing and design for LLM-powered products, agents and the data and tools they can reach.
Risk areas mapped to the OWASP Top 10 for LLM Applications. This is an explanatory mapping, not an OWASP assessment.
Prompt injection
Risk: Malicious input redirects the model.
Focus: Test prompts, retrieval and tools.
Sensitive data disclosure
Risk: Private data leaks through AI workflows.
Focus: Review access, data flows and redaction.
Excessive agency
Risk: AI has unnecessary permissions.
Focus: Bound tools and require approval.
Supply chain & poisoning
Risk: Models or data are compromised.
Focus: Check provenance and dependencies.
Insecure output handling
Risk: Unsafe outputs reach other systems.
Focus: Validate and safely handle outputs.
Abuse & unbounded consumption
Risk: Misuse drives harm, disruption or cost.
Focus: Test abuse and usage limits.
How we help
Security across the AI lifecycle.
We help teams test real use cases, build safeguards into architecture and develop governance that can be operated in practice.
- AI red teaming
- Secure AI architecture
- Evaluation and monitoring
- AI governance: ISO/IEC 42001, NIST AI RMF and EU AI Act
Framework and regulatory references are general information, not a claim of certification, compliance determination or legal advice.
Nexfend Secure platform capabilities
One view of the risks that matter.
Bring cybersecurity, AI security and data analysis into a practical workflow: understand exposure, apply policy, and keep people in control of response.
Cybersecurity
Strengthen security posture with threat detection, incident readiness and governed security operations.
Explore threat simulationAI security & guardrails
Inspect prompts, model outputs and tool calls against policy, with evaluation checkpoints and approval for sensitive actions.
Explore the AI architectureApplied research & development
Test federated learning, graph analytics and trustworthy AI against measurable research questions and real constraints.
Explore Nexfend LabsData analytics
Explore data patterns and build explainable insights for security, research and operational decisions.
Explore data analyticsTechnical training & Academy
Build practical cyber defense, secure AI and DevSecOps skills through role-based workshops and applied bootcamps.
Explore Academy pathwaysNexfend Secure is presented here as a product concept and service model. Capabilities shown are illustrative and do not imply an operational deployed SaaS platform.
A practical engagement
From uncertainty to clear action.
A focused, collaborative path that starts with your context and ends with decisions your team can own.
- 01 DISCOVER
Understand the context
Clarify objectives, constraints, stakeholders and existing controls.
- 02 ASSESS
Map risk and options
Identify material risks, dependencies and feasible paths forward.
- 03 DESIGN
Agree a proportionate plan
Prioritise architecture, advisory or research activities with clear ownership.
- 04 ENABLE
Build capability
Support implementation, knowledge transfer and learning for your team.
The Nexfend Secure operating model
Four capabilities. One security partner.
Bring security engineering, independent advisory, applied research and practical workforce development together around your organisation's real needs.
Cybersecurity services
Nexfend Enterprise
A connected cybersecurity service and research programme spanning defence, AI security and data analytics.
Built for: Organisations strengthening security and responsible AI practice.
Data analytics
Turn complex data into clearer decisions.
Use trustworthy data practices and focused analysis to understand patterns, investigate risk and support better decisions.
Data strategy & quality
Assess data readiness, provenance, quality and governance against the questions that matter.
Security analytics
Correlate security signals and surface meaningful patterns for investigation and response.
Applied machine learning
Explore graph analytics and machine-learning methods with transparent evaluation and human oversight.
Reference architecture
A resilient path from signal to action.
An illustrative security and analytics pattern. Select a layer to inspect its role and example implementation choices.
01 GOVERNED DATA
Identify approved data sources, document provenance and purpose, validate quality, and apply access and retention controls that fit the intended analysis.
Reference design only. Final controls depend on the data, use case and operating context.
Interactive threat simulator
Explore a sample scenario.
This browser-only demo replays synthetic security events. It sends no network traffic and does not measure or predict Nexfend service effectiveness.
Illustrative demo only: displayed settings and event labels are synthetic interface examples, not measured detection, latency, coverage or response results.
Environment controls SIMULATION
50020,000 req/s
Guardrail sensitivityMedium
Zero-trust enforcement
Balanced policy
Balanced policy
Synthetic events only. Metrics are illustrative and not a security assessment.
NEXFEND SIMULATION CONSOLELOCAL DEMO
Traffic input (demo setting)
8,000 req/s
Guardrail sensitivity (selected)
Medium
Policy mode (selected)
Balanced
Nexfend Labs R&D planning tool
Explore the shape of your R&D investment.
A transparent, illustrative scenario model for qualifying expenditure and risk exposure. Adjust the assumptions; use the result as a conversation starter, not tax advice.
£50k£1m
0%100%
0%30%
020
£10k£1m
Scenario credit estimate (illustrative only)
£0
Uses the selected rate assumption; not an HMRC determination
Assumed qualifying expenditure
£0
Scenario loss avoided
£0
Scenario arithmetic only: entered project costs × assumed qualifying share × user-selected rate. The model does not determine eligible expenditure, scheme, relief, tax treatment or claim value and omits many rules and costs. Scenario loss avoided is not a forecast or guarantee. Check current HMRC guidance and obtain qualified tax advice before making a claim or financial decision.
Nexfend Academy
Skills for a changing frontier.
Practical learning pathways for decision-makers, builders and teams. Browse an example course catalogue by audience.
ExecutiveILLUSTRATIVE
AI Literacy for Leaders
Understand AI capabilities, governance choices and the questions every leadership team should be asking.
View syllabus
- AI systems and risk landscape
- Governance, assurance and accountability
- Use-case triage and decision workshop
Leadership teams
Technical DevSecOpsILLUSTRATIVE
Secure AI Application Engineering
Design, test and deploy AI features with threat modelling and robust security controls in the loop.
View syllabus
- AI threat modelling and prompt boundaries
- Evaluation, observability and red teaming
- Deployment controls and incident drills
Engineers & product teams
Technical DevSecOpsILLUSTRATIVE
Secure Software Delivery
Build secure delivery habits across application design, testing and deployment.
View syllabus
- Secure coding and threat modelling
- Pipeline security and software supply chain
- Application monitoring and incident response
Engineering teams
Funding pathwaysILLUSTRATIVE
Cyber Security Skills Bootcamp
An applied foundation in cyber operations, defensive thinking and practical employability skills.
View syllabus
- Security principles and network foundations
- Threat detection and incident response
- Career preparation and practical assessment
Funding eligibility varies
ExecutiveILLUSTRATIVE
Cyber Risk for the Board
Translate technical exposure into oversight, resilience priorities and clear board-level decisions.
View syllabus
- Risk appetite and accountability
- Incident readiness and crisis decisions
- Board reporting and assurance questions
Boards & senior leaders
Funding pathwaysILLUSTRATIVE
Data & AI Foundations
Build confidence with data workflows, responsible AI concepts and applied workplace projects.
View syllabus
- Data foundations and quality
- Applied AI use cases and safe practice
- Capstone project and progression routes
Eligibility and availability vary
Course examples are indicative. Dates, accreditation, funding and eligibility are subject to programme confirmation.
Security, privacy & legal
Trust starts with transparency.
Clear boundaries for this interactive preview and the company information that must be verified before publication.
Static-site hardening
Local assets only, a restrictive same-origin CSP, deployment security headers, no inline scripts or styles, and no analytics or third-party trackers. The hosting provider must be configured to serve the included headers.
Privacy-first interaction
The simulator uses synthetic local events and creates no network traffic. The enquiry form prepares an email only after you submit it; the page does not send or store form entries. Avoid sensitive information.
Honest claims
Product screens, architecture, threat events and calculator outputs are illustrative, not measured results or a security assessment. Advisory content is general information, not legal or tax advice; no certification or claim outcome is implied.
Engagement safeguards
Test within agreed bounds.
- Before: authorisation, scope, methods and stop conditions.
- During: agreed limits, safe data handling and escalation.
- After: findings, remediation and any retest.
Rules are agreed in writing for each engagement.
Evidence & accountability
Evidence, not inflated claims.
No client stories, certifications or outcome metrics are claimed here. Public evidence requires verification and permission.
Example outputs: reports, risk registers, architecture reviews and research evaluations.
Company information:
Nexfend Ltd is a UK-based cybersecurity company. Formal company and data-protection details are not published here until they have been verified.
Official contact: nexfendsecure@gmail.com
Nexfend Ltd is a UK-based cybersecurity company. Formal company and data-protection details are not published here until they have been verified.
Official contact: nexfendsecure@gmail.com
Common questions
Clear answers, before we start.
How we scope, price and run engagements. If your question is not here, a short call is the fastest way to a straight answer.
How do engagements get scoped and priced?
Every engagement begins with a short scoping conversation. We agree objectives, in-scope assets, techniques, timing, exclusions and stop conditions in writing before any work starts. Pricing follows the agreed scope rather than a fixed package, so you only pay for work that answers your question.
What do I actually receive at the end?
Typically prioritised findings with clear evidence, practical remediation guidance, and a readout with your team. Depending on the work that can include a risk register, architecture review, research evaluation or test report. We do not dress up marketing as measured results.
How is AI security different from a normal penetration test?
AI systems add new attack surface: prompts, retrieved content, tools and agent permissions. We test those paths against the OWASP Top 10 for LLM Applications and help bound what the system is allowed to do, alongside the traditional application and infrastructure testing you would expect.
How do you handle our data and systems safely?
We work within the limits agreed in your rules of engagement, use least-privilege access, handle data carefully and escalate anything sensitive immediately. Testing stops at the agreed boundaries, and we agree data handling, retention and reporting before the work begins.
Can you work alongside our existing security team or suppliers?
Yes. We regularly complement in-house teams and other providers, sharing findings in a way your people can act on and own. Knowledge transfer is part of the engagement, not an upsell.
Do you publish client names, certifications or metrics?
Not unless they are verified and we have permission. We would rather show you our approach and let the work speak than list logos or numbers we cannot stand behind. Formal company and regulatory details are published only once confirmed.
Build what comes next