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The Assurance Desk

C3IA Solutions Limited review

Advisory firm

A UK cyber security consultancy with NCSC-assured status for audit and risk management, working for public-sector and defence clients. It also sells security testing.

Relevant if you need NCSC-assured audit or risk work for a public-sector or defence body

Price Published
Indemnity cover Not published
How it uses AI Not published
Facts last checked

Not published means we did not find it on the firm's own pages.

C3IA Solutions scores

Six scores, each 1 to 5. The evidence for each is further down.

Help when things go wrong 2/5
Qualifications of the people who do the work 4/5
What it publishes about fees 3/5
Knowledge of your sector 3/5
Independence from what it sells 4/5
Who carries the risk if the advice is wrong 2/5

What C3IA Solutions offers, and what it publishes

You get a firm the UK's National Cyber Security Centre has assured for two kinds of work: audit and review, and risk management. Its G-Cloud 14 listing says its staff hold Developed Vetting clearance, and that it holds ISO 27001, accredited on 22 September 2023, and Cyber Essentials Plus.

C3IA Solutions' own site shows no prices. Its G-Cloud 14 listing gives day rates of £497 to £1,720. It does not publish its professional indemnity insurance. It does not publish a named case study for its audit or risk work. The one case study we found sits under a different service line, C3IA Technologies.

The same firm sells penetration testing, security testing and defence systems engineering alongside its assured audit and risk work. So it can recommend a fix and then be paid to deliver it. Its Companies House filings are up to date, with accounts to 31 March 2025 filed on 8 January 2026.

Strengths

  • NCSC Assured Cyber Security Consultancy in Audit & Review and Risk Management, among the first six firms NCSC-certified, since 2017.
  • ISO/IEC 27001 accredited (22 September 2023) and Cyber Essentials Plus certified, per its own G-Cloud 14 listing.
  • CREST- and CHECK-certified security testers and Developed Vetting (DV) cleared staff, evidencing genuine public-sector/defence assurance depth.
  • Publishes an SFIA-banded day-rate card (£497-£1,720/day) on G-Cloud, giving real fee transparency for public-sector buyers.
  • Companies House filings (accounts and confirmation statement) are up to date, with no overdue filings found.

Things to check

  • C3IA's own service pages list Penetration Testing, Security Testing and defence Systems Engineering delivery alongside its NCSC-assured Audit & Review and Risk Management consultancy, so the same firm can recommend remediation and then be paid to deliver it.
  • No professional indemnity insurance details, such as insurer name or cover level, are published anywhere on C3IA's own website.

Common questions

Does C3IA publish its fees?

Yes, on G-Cloud. Its G-Cloud 14 listing gives day rates of £497 to £1,720. Its own website shows no prices.

What has the UK's NCSC assured it to do?

Audit and review, and risk management. The NCSC's register lists C3IA as an Assured Cyber Security Consultancy in those two categories.

Does C3IA sell other work besides audit and risk advice?

Yes. Its own site lists penetration testing, security testing and defence systems engineering. So the firm that recommends a fix can also be paid to deliver it.

Does C3IA publish its professional indemnity insurance?

No. Its own website names no insurer and no level of cover.

Evidence for each C3IA Solutions score

Show our working

Notes behind each thing to check

  • C3IA's own service pages list Penetration Testing, Security Testing and defence Systems Engineering delivery alongside its NCSC-assured Audit & Review and Risk Management consultancy, so the same firm can recommend remediation and then be paid to deliver it. (c3ia.co.uk/services/cyber-security/ lists Penetration Testing, Security Testing and Audit & Compliance together as services of the same firm.)
  • No professional indemnity insurance details, such as insurer name or cover level, are published anywhere on C3IA's own website. (c3ia.co.uk/about-us/ and its risk-consultancy and audit-compliance service pages contain no PI insurance disclosure of any kind.)
Six criteria, each scored 1 to 5, with the evidence for each.
CriterionScoreEvidence
Help when things go wrong 2/5 No published case study, court record or regulatory finding evidencing C3IA defending a client through an incident or regulatory probe was found on its own site or via search; equally no adverse finding was found.
Qualifications of the people who do the work 4/5 NCSC Assured Cyber Security Consultancy in Audit & Review and Risk Management, ISO/IEC 27001 accredited 22 Sep 2023, Cyber Essentials Plus, CREST/CHECK testers, DV-cleared staff, per NCSC register and C3IA's own G-Cloud listing.
What it publishes about fees 3/5 C3IA publishes an SFIA-banded day-rate card of £497 to £1,720 per day on its G-Cloud 14 listing, but no separate fee schedule or pricing appears on its own website.
Knowledge of your sector 3/5 Deep public-sector/defence pedigree since 2006 with DV-cleared, CCP-type certified staff, but its own service list spans systems engineering, radio comms and physical security well beyond assurance work.
Independence from what it sells 4/5 No proprietary compliance software or platform sale was found tied to its assurance findings; however C3IA's own site lists penetration testing and engineering delivery alongside its audit and risk consultancy.
Who carries the risk if the advice is wrong 2/5 No professional indemnity insurance level or liability commitment is disclosed on C3IA's own site; its G-Cloud listing cites only the ISO 20700 consultancy-management standard.

Sources for C3IA Solutions

  • C3IA Solutions Limited is an active private limited company, company number 05746584, incorporated on 17 March 2006. (Active; incorporated 17/03/2006) (Companies House, checked 19 September 2026)
  • C3IA holds NCSC Assured Cyber Security Consultancy status in two categories: Audit & Review and Risk Management. (Audit & Review; Risk Management) (ncsc.gov.uk, checked 19 September 2026)
  • C3IA's G-Cloud 14 listing publishes an SFIA-banded day-rate card for its NCSC assured cyber security services. (£497 to £1,720 per unit per day) (G-Cloud, checked 19 September 2026)
  • The same G-Cloud listing states C3IA's ISO/IEC 27001 certification was accredited on 22 September 2023, and that its staff are cleared to Developed Vetting (DV) level. (ISO 27001 accredited 22/09/2023; staff DV cleared) (G-Cloud, checked 19 September 2026)
  • C3IA's own company history page states it became one of the first six companies certified by NCSC to provide cyber services in 2017, having gained ISO 9001 in 2011 and ISO 27001 in 2013. (NCSC first-six 2017; ISO 9001 (2011); ISO 27001 (2013)) (c3ia.co.uk, checked 19 September 2026)
  • Companies House filing history shows C3IA's statutory filings are current: full accounts for the year ended 31 March 2025 were filed 8 January 2026, and a confirmation statement was filed 25 March 2026. (Accounts filed 08/01/2026; confirmation statement 25/03/2026) (Companies House, checked 19 September 2026)

NCSC Assured Cyber Security Consultancy in Audit & Review and Risk Management (NCSC register, ncsc.gov.uk, checked 2026-09-19) ISO/IEC 27001 accredited, dated 22 September 2023 (stated on its G-Cloud 14 listing) Cyber Essentials Plus certified (stated on its G-Cloud 14 listing) CREST- and CHECK-certified security testers on staff (stated on its G-Cloud 14 listing)

First DPO or AI policyRegulated sectors

Where this firm appears

If you represent this firm and something here is wrong or out of date, email hello@theassurancedesk.com with the evidence.

This is an independent editorial guide, not legal advice.