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.

Related compliance:NIST CSFISO 27001SOC 2
9 providers
Best UK ProviderBest for EnterpriseResearch Leaders
NCC Group logo

NCC Group

Global cybersecurity consultancy with CREST, CHECK, and CBEST accreditation, renowned for deep technical research and comprehensive penetration testing services.

75
Score
LOCManchester, United Kingdom
Web ApplicationNetworkMobile App+13
CRESTCHECKCBEST+6
Nettitude logo

Nettitude

CREST, CHECK, and CBEST accredited UK consultancy within Lloyd's Register, delivering premium penetration testing for government and critical infrastructure.

64
Score
LOCLondon, United Kingdom
Web ApplicationNetworkMobile App+10
CRESTCHECKCBEST+2
Bridewell logo

Bridewell

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

56
Score
LOCBristol, United Kingdom
Web ApplicationNetworkCloud+7
CRESTCHECKISO 27001+1
Mandiant logo

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.

53
Score
LOCReston, Virginia, United States
Red TeamingPurple TeamingNetwork+6
SOC 2ISO 27001FedRAMP 3PAO
Best OverallElite TestersResearch Pioneers
Bishop Fox logo

Bishop Fox

Premier US-based offensive security firm known for elite penetration testers, cutting-edge research, and the Cosmos continuous attack surface management platform.

50
Score
LOCTempe, Arizona, United States
Web ApplicationNetworkMobile App+8
SOC 2OSCP Employer
WithSecure logo

WithSecure

Leading European cybersecurity firm offering penetration testing with deep expertise in EU regulatory compliance including GDPR, NIS 2, and TIBER-EU.

49
Score
LOCHelsinki, Finland
Web ApplicationNetworkCloud+7
CRESTISO 27001
Black Hills Information Security logo

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.

44
Score
LOCSpearfish, South Dakota, United States
NetworkWeb ApplicationSocial Engineering+5
SOC 2
CrowdStrike logo

CrowdStrike

Global cybersecurity leader leveraging world-class threat intelligence from the Falcon platform to deliver intelligence-led penetration testing and red teaming.

43
Score
LOCAustin, Texas, United States
Red TeamingNetworkWeb Application+5
SOC 2ISO 27001
Secureworks logo

Secureworks

Dell Technologies-backed cybersecurity firm with elite Counter Threat Unit intelligence informing enterprise penetration testing and adversary simulation.

41
Score
LOCAtlanta, Georgia, United States
Web ApplicationNetworkCloud+7
SOC 2ISO 27001

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.