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Penetration Testing Companies in Ireland: An Honest Guide
This is a buyer's guide, not a how-to, but the principle behind everything we publish still holds: legitimate testing only ever runs against systems the client owns or has authorised in writing, under the Criminal Justice (Offences Relating to Information Systems) Act 2017.
Most 'best penetration testing companies in Ireland' lists are written by one of the companies, or by an overseas firm using the list as a lead magnet. This one is written by a provider, and we'll still tell you honestly how to choose — including when the right answer isn't us. If that seems odd, it's the whole point of how we do things: you make a better decision with real information, and we'd rather earn a client who chose well.
The landscape, briefly
Irish organisations buying pentesting generally choose between a few types of provider:
- Large managed-security firms (for example Integrity360, Smarttech247) — broad services, 24/7 SOCs, good for enterprises wanting one partner for everything. Testing is one line in a big catalogue.
- Established IT/security providers (for example PFH) — long track records, CREST membership, often part of larger groups. Solid, if sometimes generalist.
- Specialist testing firms and red teams — smaller, offensive-security-focused, often deeper technically on the testing itself.
- The big consultancies (EY, KPMG and similar) — scale and brand, priced accordingly, common in regulated finance.
- Overseas platform providers — PTaaS and automated-plus-validated models marketed into Ireland; convenient, but check who actually does the manual work.
None of these is 'best' in the abstract. The best provider is the one that fits your size, your risk, and the specific thing you need tested.
The questions that actually matter
Ignore the trust strip for a moment — everyone has CREST and OSCP on the page. Ask these instead:
- Can I see a redacted sample report? The quality gap between providers is nowhere more visible. If they won't show one, move on.
- Who exactly will test, and what have they published? Named, findable testers who write and speak beat an anonymous 'certified team'.
- Is this manual testing or a scan with a report? Ask directly whether a human attempts exploitation and whether the report shows attack chains.
- Is a re-test included? The fix-and-confirm loop is where security actually improves.
- How do you handle production risk? A good answer is specific and cautious, not 'don't worry'.
- Will you tell me if I don't need this yet? A provider willing to lose the sale is a provider worth trusting.
- Do you know my sector? OT, finance under DORA, health data — domain knowledge changes the quality of findings.
Red flags
- A price with no scope, or a suspiciously cheap flat fee (usually an automated scan).
- No sample report available, even redacted.
- 'Elite', 'guardians', 'military-grade' — marketing language standing in for substance.
- No re-test, or no debrief call.
- Pressure to buy the biggest scope before you've done the basics.
- A generic report you could have generated with a free scanner.
What certifications do and don't tell you
CREST membership means a firm meets a recognised standard for process and testing — worth having, and often required for regulated work. OSCP and similar mean an individual tester passed a hard, hands-on exam. Both are a floor, not a ceiling: they tell you someone is competent, not that they're the right fit or that they'll write you a report you can use. Treat certifications as a filter, then judge on the sample report and the answers to the questions above.
Where CyberLabs fits — honestly
We're a specialist, education-first provider with particular depth in network and OT/ICS environments. We're a good fit if you value a tester who explains their work, publishes openly, and will tell you plainly where you stand — including 'you're not ready for this yet'. We're not the right call if you need a 24/7 managed SOC bundled in, or a global-consultancy brand on the cover for a board that only recognises the big four. When that's what you need, one of the firms above will serve you better, and we'll say so.
Common questions
How do I choose a penetration testing company in Ireland?
Look past the certifications everyone lists and ask the questions that reveal quality: can I see a sample report, who exactly will test, is this manual testing or a scan, is a re-test included, and will you tell me if I don't need this yet? Then match the provider's size and specialism to your actual risk and sector.
Do penetration testers need to be CREST certified in Ireland?
It's not a legal requirement, but CREST membership is a recognised standard and is often required for regulated work or by larger clients. Treat it as a useful filter that shows a baseline of competence, not as proof a provider is the right fit — the sample report and the tester's actual experience tell you more.
Should I use a big firm or a specialist for penetration testing?
It depends on what you need. Large managed-security firms and consultancies suit enterprises wanting one partner and a recognised brand; specialist testing firms often go deeper on the testing itself and cost less. Match the provider to your size, sector and the specific system being tested rather than to reputation alone.
If, after all that, you'd like to talk to us, here's how a CyberLabs engagement works — and if we're not the right fit for what you need, we'll tell you who might be.
No prices on this page and no hard sell.
This page is educational and not legal advice. Only test systems you own or are explicitly authorised to test. · ↑ Back to top