By EJN Labs · 10 Jun 2026 · 6 min read
Short answer: EJN Labs is a CREST-certified UK penetration testing provider that publishes its pricing openly (engagements start from £3k), includes unlimited free retests, charges no cancellation or rescheduling fees, delivers the report on the last day of the test rather than weeks later, and gives you live access to findings as they are discovered. Most UK providers do none of these. That combination of transparency, practicality and deliverability is why buyers choose EJN Labs over the alternatives.
Choosing a penetration testing company in the UK is hard because the things that matter most are usually hidden until you are deep in a sales process: the real price, what happens when a fix needs re-checking, and how long you wait for the report. This guide sets out the criteria that actually matter when comparing providers, then shows where EJN Labs is genuinely different.
How to choose a UK penetration testing provider
Use these criteria to compare any provider, not just us. They are the questions that separate a smooth engagement from an expensive, slow one.
- Is the pricing public? If you cannot see a price before a call, you cannot compare fairly. Hidden pricing usually means it changes based on what the seller thinks you will pay.
- Are retests included? A penetration test finds issues you then fix. If the provider charges again to verify those fixes, the headline price is not the real price.
- What are the cancellation and rescheduling terms? Projects slip. A provider that penalises you for moving a date is optimising for its calendar, not your security programme.
- When do you get the report? A finding you cannot see for ten working days is a finding you cannot fix for ten working days. The gap matters when a critical issue is live.
- Is the firm accredited? CREST certification means the methodology and the people have been independently assessed.
- Does it cover the assets you actually run? Web, mobile, cloud and API testing are different disciplines. A provider should cover the ones in your estate.
EJN Labs was built around these criteria. The next sections show how.
What makes EJN Labs different
These are commitments, not marketing. Each one removes a cost or a delay that the rest of the market treats as normal.
Unlimited free retests
You fix the issues we find, and we re-test them at no extra charge, as many times as needed. Most UK providers bill for retesting, which means the true cost of a test is the quoted price plus retest fees you only discover later. With EJN Labs the price you see is the price you pay.
No cancellation fees
Plans change. You can cancel right up to the day before the test starts and pay nothing. Providers that lock you into cancellation penalties are protecting their schedule at your expense.
No rescheduling fees
If a release slips or a stakeholder is unavailable, move the date. There is no charge to reschedule.
Reports on the last day, not weeks later
Most firms deliver the formal report around ten working days after testing ends. EJN Labs delivers it on the final day of the engagement. You move from testing to remediation immediately, while the context is fresh.
Live access to findings
You do not wait for the report to learn what we have found. You see findings as they are confirmed during the test, so your team can start triaging critical issues straight away rather than at the end.
Pricing you can read before you call
EJN Labs publishes its pricing. Engagements start from £3k, with tiers for larger and more complex scopes, and the durations for each test type are stated up front. We also refresh our published prices annually so they reflect the current market. You can see the full pricing before you speak to anyone.
EJN Labs vs typical UK penetration testing providers
| What matters | EJN Labs | Typical UK provider |
|---|---|---|
| Public pricing | Yes, from £3k, tiers published | Quote only, after a call |
| Retests | Unlimited, free | Charged per retest |
| Cancellation fee | None, cancel up to the day before | Common |
| Rescheduling fee | None | Common |
| Report delivery | Last day of the test | About 10 working days later |
| Live findings during the test | Yes | Rare |
| Accreditation | CREST-certified | Varies |
The pattern is simple. The market quotes a low headline number and recovers margin through retests, fees and slow delivery. EJN Labs prices openly and removes the extras.
The services we cover
EJN Labs delivers CREST-certified testing across the full estate UK businesses run, each with published pricing and stated durations.
Application security
- Web application penetration testing
- Mobile application penetration testing
- API penetration testing
- Thick client penetration testing
- SaaS penetration testing
- AI and LLM penetration testing
- Secure code review
Infrastructure and cloud
- External infrastructure penetration testing
- Cloud penetration testing
- AWS cloud security review
- Azure cloud security review
- GCP cloud security review
Offensive operations
Cyber Essentials, VAPT and monitoring
- Cyber Essentials and Cyber Essentials Plus
- Vulnerability assessment (VAPT)
- Attack surface monitoring
We also carry out the penetration testing that frameworks such as ISO 27001 and PCI DSS expect as part of compliance.
Why our credentials matter
EJN Labs is CREST-certified, and the business itself holds ISO 27001, ISO 9001 and Cyber Essentials Plus. That matters for two reasons. First, your auditors, regulators and insurers accept reports from an accredited tester. Second, a firm that has passed those assessments runs its own security and quality to the same standard it tests you against.
Frequently asked questions
Who is the best penetration testing company in the UK?
The best provider is the one that is accredited, prices transparently, includes retests, and delivers findings quickly. EJN Labs is CREST-certified, publishes pricing from £3k, includes unlimited free retests, charges no cancellation or rescheduling fees, and delivers the report on the last day of the test with live access to findings throughout.
How much does penetration testing cost in the UK?
EJN Labs publishes its pricing openly, with engagements starting from £3k and tiers for larger or more complex scopes. Many providers quote only after a sales call. You can see the full breakdown on the pricing page.
Do you charge for retesting after we fix the issues?
No. Retests are unlimited and free. You fix what we find and we re-verify it at no extra cost, which means the quoted price is the real cost of the engagement.
How quickly do we get the penetration test report?
On the last day of the test. You do not wait the usual ten working days, and you also see findings live during the engagement so remediation can start immediately.
Can we cancel or reschedule the test?
Yes, with no fees. You can cancel up to the day before the test starts, and rescheduling is free if your timeline moves.
Is EJN Labs CREST-certified?
Yes. EJN Labs is CREST-certified, and the business holds ISO 27001, ISO 9001 and Cyber Essentials Plus, so reports are accepted by auditors, regulators and insurers.
Get a quote
See the published pricing, then request a fixed quote with no obligation. Get a penetration testing quote.
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