Best Red Teaming Companies (2026)
Red teaming goes beyond traditional penetration testing by simulating realistic, end-to-end attacks against your organisation. The best red teaming companies employ advanced adversary simulation techniques mapped to frameworks like MITRE ATT&CK, testing your detection and response capabilities against sophisticated threat actors.
These providers specialise in red team engagements including CBEST, TIBER-EU, and bespoke adversary simulations. They are recommended for organisations with mature security programmes that want to validate their defensive capabilities.
Aardwolf Security
Boutique UK penetration testing consultancy in Milton Keynes specialising in manual, expert-led security assessments across web applications, APIs, cloud, and mobile platforms.
Aon Cyber Solutions
Cybersecurity consulting division of global insurance leader Aon, uniquely combining penetration testing with cyber risk quantification and insurance expertise.
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.
Bishop Fox
Premier US-based offensive security firm known for elite penetration testers, cutting-edge research, and the Cosmos continuous attack surface management platform.
Black Hills Information Security
Community-driven penetration testing firm known for free security education, open-source tools, Wild West Hackin' Fest, and practical offensive security services.
Blaze Information Security
CREST-accredited boutique pen testing firm with offices across Europe and Brazil, serving 200+ organisations in 25 countries.
Bridewell
Fast-growing CREST and CHECK-accredited UK cybersecurity consultancy with deep expertise in critical national infrastructure sectors.
Bulletproof
CREST-accredited UK cybersecurity and compliance provider offering penetration testing, managed security services, and regulatory consultancy to over 2,000 customers from its Stevenage headquarters.
Claranet
CREST and CHECK-accredited European managed services provider delivering penetration testing with deep infrastructure and cloud hosting expertise.
CovertSwarm
Subscription-based offensive cybersecurity firm delivering continuous cyber attack services with CREST STAR and CBEST accreditations from its London headquarters.
CrowdStrike
Global cybersecurity leader leveraging world-class threat intelligence from the Falcon platform to deliver intelligence-led penetration testing and red teaming.
Cyberis
CREST and CHECK-accredited UK penetration testing consultancy with CBEST approval, specialising in infrastructure, application, and simulated attack assessments across the public and private sectors.
CyberLab
Cardiff-based CREST and CHECK-accredited cyber security company delivering penetration testing, red teaming, and OT security assessments as part of the Chess Group.
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.
DTS Solution
Dubai-based cybersecurity firm providing pen testing and security consulting across the GCC with expertise in critical infrastructure.
Evalian
CREST-accredited UK cyber security and data protection consultancy offering penetration testing, ISO consultancy, and managed SOC services from offices across the UK and Ireland.
Integrity360
CREST-accredited pan-European cybersecurity services provider delivering penetration testing and managed security from Dublin with a strong UK and Ireland presence.
IOActive
Elite boutique security consultancy specializing in IoT, SCADA/ICS, embedded systems, and hardware security research with world-renowned researchers.
JUMPSEC
Full-service London-based cybersecurity consultancy with CREST, CHECK, and NCSC accreditations delivering offensive testing, managed detection, and strategic advisory services.
Komodo Consulting
Tel Aviv-based offensive security consultancy leveraging Israel's deep cybersecurity talent for pen testing, red teaming, and threat intelligence.
LRQA
The only organisation worldwide with a full suite of CREST accreditations. 250+ cybersecurity specialists operating in 55+ countries across pen testing, red teaming, and incident response.
Mandiant
World-renowned cybersecurity firm now part of Google Cloud, delivering threat intelligence-led penetration testing and red teaming informed by front-line incident response experience.
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.
NCC Group
Global cybersecurity consultancy with CREST, CHECK, and CBEST accreditation, renowned for deep technical research and comprehensive penetration testing services.
NetSPI
Leading penetration testing firm with the Resolve platform for continuous attack surface management, trusted by nine of the top ten US banks.
Nettitude
CREST, CHECK, and CBEST accredited UK consultancy within Lloyd's Register, delivering premium penetration testing for government and critical infrastructure.
Offensive Security
Creators of OSCP, Kali Linux, and Exploit-DB, offering elite penetration testing services from the team that trains the world's ethical hackers.
Packetlabs
Canada's most reviewed cybersecurity company. CREST-certified, SOC 2 Type II-attested pen testing from Toronto.
Pen Test Partners
The UK's largest independent security testing firm, renowned for IoT/OT research, CBEST red teaming, and CHECK/CREST-accredited penetration testing across all sectors.
Pentest People
CREST and CHECK-accredited UK penetration testing firm with an innovative SecurePortal platform and transparent pricing for mid-market organizations.
Praetorian
Offensive security firm founded by former DoD professionals, offering elite penetration testing and the Chariot continuous attack surface management platform.
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.
Rapid7
Creators of Metasploit offering enterprise penetration testing integrated with their comprehensive vulnerability management and security operations platform.
Raxis
Gartner-recognised PTaaS provider with 14+ years of experience. Expert-led pen testing combining manual techniques with AI-powered tooling across web, cloud, mobile, and SCADA/ICS.
Redbot Security
Denver-based boutique pen testing firm with senior-only testers. Personalised engagements across penetration testing, red teaming, and vulnerability management.
Redscan (A Kroll Business)
London-based cybersecurity provider, now part of Kroll, delivering CREST-accredited penetration testing, managed detection and response, and incident response with a 550-strong cyber team.
RedSecLabs
CREST-certified and PCI QSA penetration testing consultancy in London, delivering offensive security and compliance services across 25+ countries with research-driven expertise.
RedTeam Security
Atlanta-based pen testing firm serving major enterprises. Known for physical penetration testing alongside network and application assessments.
Rhino Security Labs
Cloud security penetration testing specialists known for the Pacu AWS exploitation framework and deep expertise across AWS, Azure, and GCP environments.
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.
SEC Consult
Leading European cybersecurity consultancy from Vienna with a prolific vulnerability research program and deep expertise in IoT and embedded systems security.
Secarma
Manchester-based independent cybersecurity consultancy with over 20 years of experience delivering CREST and CHECK-accredited penetration testing, red teaming, and compliance certification services.
SECFORCE
Leading UK offensive security consultancy based in Canary Wharf, delivering CREST-accredited penetration testing and adversary simulation to organisations with the most demanding security requirements.
Secureworks
Dell Technologies-backed cybersecurity firm with elite Counter Threat Unit intelligence informing enterprise penetration testing and adversary simulation.
Securing (SecuRing)
Poland's longest-running independent pen testing firm with 50+ consultants. Specialises in application security, cloud testing, and red teaming.
Sencode
CREST-accredited North East England penetration testing specialist founded in 2019, offering accessible and transparent security testing with free retests and a strong focus on social engineering.
SensePost (Orange Cyberdefense)
Elite ethical hacking team within Orange Cyberdefense with 20+ year track record. Known for building industry-standard security tools and groundbreaking research.
Shielder
Independent Italian offensive security firm specialising in web, mobile, network, and embedded security assessments with a strong research focus.
SpecterOps
Adversary-focused security firm created by former DoD red team operators. Creators of BloodHound. CREST-accredited for penetration testing, red teaming, and purple team assessments.
Stripe OLT
Award-winning CREST-certified managed cyber security and IT support provider with offices in Bristol, London, and Manchester, specialising in penetration testing and Microsoft security technologies.
Synack
FedRAMP-authorized crowdsourced penetration testing platform combining vetted elite hackers with AI-powered Hydra technology for continuous security testing.
Telspace Africa
Johannesburg-based infosec consultancy operating since 2002. One of Africa's oldest pen testing firms with deep technical expertise.
ThreatSpike Red
London-based cybersecurity firm offering unlimited, fixed-price penetration testing and red teaming services with ISO 27001 certification and a unique subscription model.
TrustedSec
Elite offensive security firm founded by a former NSA operator, delivering CREST-accredited penetration testing, red teaming, and adversary simulation to Fortune 500 and government clients.
Trustwave
Global managed security provider with the elite SpiderLabs penetration testing team and deep PCI DSS compliance expertise.
Vumetric (TELUS)
ISO 9001-certified Canadian pen testing firm conducting 500+ tests annually. Now part of TELUS, serving Fortune 1000 to SMBs.
WithSecure
Leading European cybersecurity firm offering penetration testing with deep expertise in EU regulatory compliance including GDPR, NIS 2, and TIBER-EU.
Best Red Teaming Companies (2026) — FAQs
What is red teaming and how does it differ from pen testing?+
Red teaming is an objective-driven adversary simulation that tests your organisation's detection and response capabilities. Unlike pen testing, which focuses on finding vulnerabilities within a defined scope, red teaming simulates realistic attacks across the full kill chain to test people, processes, and technology.
How much does a red team engagement cost?+
Red team engagements typically cost between £30,000 and £150,000+ depending on scope, duration, and complexity. Engagements usually last 4-12 weeks. Regulated frameworks like CBEST and TIBER-EU tend to be at the higher end.
Is my organisation ready for red teaming?+
Red teaming is most valuable when you have mature security controls including a SOC, EDR solutions, incident response procedures, and network segmentation. If basic security controls are lacking, traditional pen testing may be more appropriate first.
What is CBEST and TIBER-EU?+
CBEST is the Bank of England's framework for intelligence-led red teaming of financial institutions. TIBER-EU is the European Central Bank's equivalent framework. Both require specialised, accredited red team providers and are mandatory for significant financial entities.