Cybersecurity Services: 4 global agencies to consider
Cybersecurity Services agencies: Mandiant, NCC Group, IBM Security Services / X-Force, Orange Cyberdefense. Sources linked; order is not a ranking.
Providers shortlisted for incident response, assurance and managed security.
| Agency | HQ | Best for |
|---|---|---|
| Mandiant (Google Cloud) | Reston, Virginia and Mountain View, California (sources vary); part of Google Cloud | Incident readiness, breach response and threat-led security improvement. |
| NCC Group | Manchester, UK | Independent technical assessments, penetration testing and incident preparedness. |
| IBM Security Services / X-Force | Part of IBM (Armonk, New York, USA) | Large security programmes spanning preparedness, testing and response. |
| Orange Cyberdefense | Paris La Defense, France (third-party sources) | Organisations seeking ongoing managed protection alongside specialist advice. |
Mandiant (Google Cloud)
Best for: Incident readiness, breach response and threat-led security improvement.
Specialist consulting covering incident response, threat intelligence, security assessments and defence improvement.
In this category:
- Incident readiness and breach response
- Threat-led security improvement
Services
Best at
- Incident readiness and breach response
- Threat-led security improvement
Also offers
- Security consulting
- Threat-led security improvement
- Google Cloud security integration
NCC Group
Best for: Independent technical assessments, penetration testing and incident preparedness.
Technical security specialist with penetration testing and incident response. UK NCSC listings provide external assurance for specific services.
In this category:
- Technical assurance and penetration testing
- Incident response and preparedness, with NCSC scheme assurance on specific services
Services
What stands out
- Extensive accreditations listed (CREST, CBEST, NCSC schemes, TISAX, UKAS)
- Named clients including TikTok, Vodafone and Transport for London
- Listed on the London Stock Exchange (FTSE 250, per Wikipedia)
Research before choosing
- Accreditations are self-listed; verify with each scheme
- Headcount differs slightly by source
- Pricing not published
IBM Security Services / X-Force
Best for: Large security programmes spanning preparedness, testing and response.
Broad enterprise security offering supported by X-Force research, threat intelligence, incident response and adversary simulation.
In this category:
- Preparedness, testing and incident response in one offering
- Adversary simulation backed by X-Force research
Services
Best at
- Preparedness, testing and incident response in one offering
- Adversary simulation backed by X-Force research
Also offers
- Cyber strategy and risk
- Autonomous security and agentic IAM offerings
- Quantum-safe transformation
Orange Cyberdefense
Best for: Organisations seeking ongoing managed protection alongside specialist advice.
Combines security consulting with managed detection, response, cloud security and security operations.
In this category:
- Managed protection alongside specialist advice
- Security consulting combined with MDR and cloud security
Services
Best at
- Managed protection alongside specialist advice
- Security consulting combined with MDR and cloud security
Also offers
- Security consulting
- Cloud security
How to choose
- Check accreditations on the scheme's own register.
- Ask about response times and who is on call.
- Clarify scope: advisory, testing or managed operations.
- Request references in your sector.
Run an agency in this category?
Listing is free and review is the same for everyone.