Purple Teaming Providers
Purple teaming is a collaborative security exercise that brings together offensive (red team) and defensive (blue team) capabilities to improve an organisation's detection and response posture. Unlike adversarial red team exercises where the blue team is unaware, purple teaming is a cooperative effort where attackers and defenders work side by side.
The red team executes specific attack techniques while the blue team observes whether their tools and processes detect the activity, then jointly works to improve detection rules, response playbooks, and security controls. Purple teaming uses frameworks like MITRE ATT&CK to systematically test coverage across different attack techniques, identify detection gaps, and develop specific mitigations.
This approach maximises the value of both offensive and defensive capabilities by ensuring that every attack technique tested leads to a measurable improvement in detection and response. Purple teaming is particularly effective for organisations that have invested in security operations and want to optimise their return on security tooling investments. It provides clear, actionable outcomes and measurable improvement in security posture.
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.
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.
CrowdStrike
Global cybersecurity leader leveraging world-class threat intelligence from the Falcon platform to deliver intelligence-led penetration testing and red teaming.
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.
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.
NCC Group
Global cybersecurity consultancy with CREST, CHECK, and CBEST accreditation, renowned for deep technical research and comprehensive penetration testing services.
Nettitude
CREST, CHECK, and CBEST accredited UK consultancy within Lloyd's Register, delivering premium penetration testing for government and critical infrastructure.
Secureworks
Dell Technologies-backed cybersecurity firm with elite Counter Threat Unit intelligence informing enterprise penetration testing and adversary simulation.
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.
Tevora
CREST-accredited California consultancy blending compliance expertise with penetration testing. First to earn ISO 17020 for MITRE ATT&CK and PTES frameworks.
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.
WithSecure
Leading European cybersecurity firm offering penetration testing with deep expertise in EU regulatory compliance including GDPR, NIS 2, and TIBER-EU.
Purple Teaming FAQs
What is the difference between purple teaming and red teaming?+
Red teaming is adversarial - the blue team does not know when or how attacks will occur. Purple teaming is collaborative - both teams work together in real-time to test and improve detection and response capabilities.
What do I need in place before purple teaming?+
You need a functioning security operations capability with detection tools (SIEM, EDR), defined response processes, and staff who can participate in the exercises. Purple teaming works best when there is a baseline of security maturity.
How are results measured?+
Results are measured in terms of detection coverage (percentage of tested techniques detected), mean time to detect, mean time to respond, and specific improvements made to detection rules and response playbooks.