Automated API security testing for UK teams. Scan your endpoints. Read plain-English findings. Fix and retest. No consultancy. No 3-week wait.
Trusted by UK teams securing APIs
Pen testing shouldn't cost more than your server.
The average UK web app pen test costs £3,750–£6,250 and takes 2–4 weeks to deliver a PDF you'll read once.
Most SMEs skip testing entirely. Only 12% of UK businesses pen tested last year.
N4Z gives you continuous automated security testing for less than the cost of one manual engagement — with results in minutes, not weeks.
Traditional Pen Test
- £3,750 – £6,250
- 2–4 week turnaround
- Annual engagement
- PDF report
- Manual retest (extra £)
N4Z
- From £49/mo
- Results in minutes
- Continuous scanning
- Live dashboard + PDF
- One-click retest
- AI-powered summaries
Three steps. Five minutes. Zero consultants.
Point
Paste your API URL or upload your Swagger/OpenAPI spec. We map every endpoint automatically.
Scan
N4Z crawls endpoints, tests authentication, fuzzes inputs, checks for OWASP Top 10 and abuse signals.
Fix
Prioritised findings with plain-English remediation. Fix the issue, hit retest, confirm it's resolved. Ship with confidence.
See what N4Z finds.
Scanned by N4ZBuilt for builders, not compliance departments.
Swagger-Aware
Upload your OpenAPI spec and N4Z maps every endpoint, understands schemas, and tests intelligently.
AI Executive Summary
Every scan produces a plain-English summary your non-technical stakeholders can actually read.
Compliance-Ready
Findings mapped to Cyber Essentials, ISO 27001, and OWASP ASVS controls.
Fix-Retest-Compare
Fix a vulnerability, hit retest, and see a clean before/after comparison report.
UK-Hosted
Your scan data stays in the UK. No data leaves jurisdiction. Matters for NHS, fintech, legal.
Branded PDF Reports
Professional reports suitable for insurers, auditors, and client due diligence.
Beyond port scanning.
N4Z performs deep API security verification — not just surface-level reachability checks.
Less than one manual pen test. All year.
Starter
£399/yr — save 32%
- ✓2 web app targets
- ✓1 network target (10 IPs)
- ✓Monthly automated scans
- ✓AI executive summaries
- ✓PDF reports
- ✓Email support
Pro
£1199/yr — save 33%
- ✓10 web app targets
- ✓5 network targets (50 IPs)
- ✓Weekly automated scans
- ✓API endpoint scanning
- ✓CI/CD integration
- ✓Scheduled scans
- ✓Slack alerts
- ✓Priority support
Business
£3199/yr — save 33%
- ✓Unlimited targets
- ✓Daily scans
- ✓Team accounts (up to 10)
- ✓Compliance mapping
- ✓White-label reports
- ✓Dedicated support
14-day free trial. No credit card required.
Need more? Enterprise plans with internal network agents, cloud config review, and managed pen testing available. Talk to us →
What UK teams are saying.
“N4Z found an auth bypass in our staging API that we'd missed for six months. Took 4 minutes.”
— CTO, [SaaS Company], London
“We used to skip pen testing because of cost. Now we scan weekly for less than our Slack bill.”
— Founder, [eCommerce Brand], Manchester
“The AI summary was good enough to send directly to our insurer for Cyber Essentials renewal.”
— Head of Engineering, [Fintech], Edinburgh
Questions.
Know your weaknesses
before someone else does.
Start your free trial →No credit card required. 14-day free trial. Cancel anytime.