NIS 2 Penetration Testing Providers

Network and Information Security Directive 2 · Europe

NIS 2 is the EU's updated cybersecurity directive that significantly expands the scope and requirements of the original NIS Directive. Effective from October 2024, NIS 2 applies to essential and important entities across 18 sectors and introduces stricter security requirements, incident reporting obligations, and supply chain security measures.

Article 21 requires entities to implement risk-based cybersecurity measures including vulnerability handling and disclosure, security testing, and security audits. NIS 2 explicitly recognises penetration testing as a key security measure and encourages regular testing of network and information systems.

The directive also introduces personal accountability for management bodies, making senior leadership directly responsible for approving and overseeing cybersecurity risk management measures. Non-compliance can result in fines of up to 10 million euros or 2% of global annual turnover for essential entities. Penetration testing helps organisations meet NIS 2 requirements by identifying vulnerabilities, testing incident response capabilities, and demonstrating a proactive approach to cybersecurity risk management.

Particularly relevant for Energy and utilities pen testing providers.

27 providers
CREST CertifiedAdversary Simulation
SECFORCE logo

SECFORCE

Canary Wharf-based adversary simulation and CBEST-aligned penetration testing consultancy, delivering CREST-accredited offensive security to UK financial services and other organisations with the most demanding requirements.

London, United KingdomPremium
Web ApplicationNetworkMobile App+10
CRESTCBESTSTAR+3
Verified Jun 2026
PwC Cyber Security logo

PwC Cyber Security

Global Big Four professional services firm delivering CREST, CHECK, and CBEST-accredited penetration testing and red teaming services from London, serving the UK's largest enterprises and regulated organisations.

London, United KingdomEnterprise
Web ApplicationNetworkIoT+9
CRESTCHECKCBEST+3
Verified Apr 2026
Dionach logo

Dionach

Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.

Oxford, United KingdomPremium
Web ApplicationNetworkRed Teaming+8
CRESTCHECKSTAR+3
Verified Apr 2026
MDSec logo

MDSec

Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.

Southam, United KingdomPremium
Web ApplicationNetworkCloud+7
CRESTCHECKCBEST+4
Verified Apr 2026
Aristi logo

Aristi

CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.

Birmingham, United KingdomMid-Range
Web ApplicationNetworkMobile App+8
CRESTCHECKISO 27001+3
Verified May 2026
Bridewell logo

Bridewell

Fast-growing CREST and CHECK-accredited UK cybersecurity consultancy with deep expertise in critical national infrastructure sectors.

Bristol, United KingdomMid-Range
Web ApplicationNetworkCloud+7
CRESTCHECKISO 27001+1
Verified Apr 2026
JUMPSEC logo

JUMPSEC

Full-service London-based cybersecurity consultancy with CREST, CHECK, and NCSC accreditations delivering offensive testing, managed detection, and strategic advisory services.

London, United KingdomMid-Range
Web ApplicationNetworkCloud+6
CRESTCHECKISO 27001+3
Verified May 2026
Salus Cyber logo

Salus Cyber

Award-winning Cheltenham-based cybersecurity consultancy with NCSC CHECK Green Light status and CREST approval, specialising in defence, government, and critical national infrastructure security.

Cheltenham, United KingdomMid-Range
Web ApplicationNetworkCloud+6
CRESTCHECKISO 27001+3
Verified Apr 2026
Global Defence PlayerANSSI-Qualified
Thales Cyber Solutions logo

Thales Cyber Solutions

Cybersecurity division of the Thales Group, with ANSSI, CREST, FedRAMP 3PAO, and NATO-cleared personnel. Defence, government, and critical infrastructure penetration testing worldwide.

Paris, FranceEnterprise
Web ApplicationNetworkCloud+9
CRESTFedRAMP 3PAOISO 27001+1
Verified Apr 2026
WithSecure logo

WithSecure

Helsinki-headquartered Finnish cybersecurity firm with roots dating to 1988, offering CREST-accredited penetration testing and deep expertise in EU regulatory compliance including GDPR, NIS 2, and TIBER-EU.

Helsinki, FinlandEnterprise
Web ApplicationNetworkCloud+7
CRESTISO 27001
Verified May 2026
SensePost (Orange Cyberdefense) logo

SensePost (Orange Cyberdefense)

Ethical hacking team within Orange Cyberdefense with a 20+ year track record. Known for building industry-standard security tools and groundbreaking research.

Pretoria, South AfricaMid-Range
Web ApplicationNetworkRed Teaming+3
CRESTISO 27001
Verified Apr 2026
Payment Security LeadersPCI QSA
usd AG logo

usd AG

Frankfurt-based European payment security specialist holding the full set of PCI credentials (QSA, PFI, ASV, P2PE). Manual-first penetration testing for fintechs, acquirers, and regulated enterprises.

Frankfurt, GermanyPremium
Web ApplicationNetworkCloud+6
PCI QSAPCI PFIPCI ASV+1
Verified May 2026

NIS 2 FAQs

Who does NIS 2 apply to?+

NIS 2 applies to essential entities (energy, transport, health, digital infrastructure, etc.) and important entities (manufacturing, food, chemicals, digital providers, etc.) with more than 50 employees or 10M EUR turnover.

What security testing does NIS 2 require?+

Article 21 requires risk-based cybersecurity measures including vulnerability handling, security testing, and cyber hygiene practices. Penetration testing is the primary method for meeting security testing requirements.

When does NIS 2 take effect?+

NIS 2 entered into force in January 2023 with EU member states required to transpose it into national law by October 2024. Most member states have implemented or are implementing national legislation.