CST
CST is a Bristol, UK-based private cyber security, consulting, installation and maintenance services firm founded in 1995, employing 11-50 staff to serve B2B clients across the security deployment lifecycle.
- Company typePrivate
- Founded1995
- HeadquartersBristol, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What CST does
CST is a private United Kingdom-based services firm headquartered in Bristol that provides cyber security, consulting, installation and maintenance services. Founded in 1995, the company has operated for approximately 30 years, suggesting an established regional position in the physical and/or cyber security services market. The company's service mix spans the full deployment lifecycle — from initial consulting and system design through installation and ongoing maintenance — which is typical of systems integrators and managed security service providers serving commercial and institutional clients.
The firm's operational scale is small, with a disclosed headcount band of 11-50 employees, and it operates as a privately held for-profit entity. Beyond the high-level service description and basic firmographics, the source material provides no further detail on the company's product portfolio, proprietary technology stack, go-to-motion, pricing structure, customer base, certifications, partnerships, or financial performance. The company's own website (cstltd.com) returned only a verification/loading screen during data collection, so no first-party website content was available to enrich the profile. The legal name, ownership structure, management team, and funding history are all undisclosed in the available data.
Given the data limitations, the company's business model is best characterized as a B2B services revenue model built on project-based installation engagements and recurring maintenance contracts, consistent with the broader UK small/mid-market security services segment. No information is available to confirm or refute assumptions about customer concentration, vertical mix, geographic reach beyond Bristol, or competitive positioning. Any investment, partnership, or M&A assessment for CST would require substantially more first-party data — including management interviews, customer references, revenue disclosures, and a current capability inventory — before reliable conclusions can be drawn.
CST firmographics
Firmographics- Name
- CST
- Website
- https://cstltd.com
- Company type
- Private
- Founded year
- 1995
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- CST is a Bristol, UK-based private cyber security, consulting, installation and maintenance services firm founded in 1995, employing 11-50 staff to serve B2B clients across the security deployment lifecycle.
- Ownership category
- akta.pro rank
CST industry classification
Industry- Product category
- IT Security & Consulting Services
- NAICS
- Computer Systems Design and Related Services (54151), Security Systems Services (except Locksmiths) (561621)
- SIC
- Services-Management Consulting Services (8742)
- akta.pro primary industry
- Privacy, Data Protection & Cyber Governance (GRC) (BPAHAFAF)
Keywords
Where CST is headquartered
LocationHeadquarters
- HQ city
- Bristol
- HQ country
- United Kingdom
- HQ region
- Europe
Markets served
CST business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Supply Chain
CST product offering
Product offeringCore offering
CST provides cyber security services alongside broader IT consulting, installation, and maintenance offerings to organizational customers. As a small Bristol-based firm (11–50 employees) operating since 1995, it delivers these capabilities as professional services rather than as packaged software or hardware products.
Differentiator
Problem solved
Functional benefit
Products and services
- Cyber security services Cyber security service offering delivered to organizations, based on the company's stated short description that it provides cyber security alongside consulting, installation, and maintenance.
- IT consulting services Consulting service offered to organizations to address IT and security needs, per the company's stated short description.
- Installation services Installation services delivered to organizational clients as part of CST's stated offering set.
- Maintenance services Ongoing maintenance and support services delivered to organizational clients as part of CST's stated offering set.
Companies that use CST
Customer profileIdeal customer profiles1 record
CST technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
CST competitors and assessment
Company assessmentBroad incumbents
- Trustwave: Global cybersecurity services and managed detection provider with strong UK presence. Comparable on managed security and consulting, though materially larger and broader in scope than CST.
- BAE Systems (Applied Intelligence): Large UK-headquartered defence and security firm operating a significant cyber consulting and managed services division. Comparable as a UK cyber services provider, though at materially greater scale.
- PwC UK (Cyber & Privacy): Big Four firm's UK cyber practice offering advisory, GRC, and managed security. Overlaps with CST on the consulting and cyber governance side, particularly with regulated UK buyers.
Direct peers
- NCC Group: UK-headquartered cybersecurity services firm offering consulting, managed detection, and technical assurance. Directly comparable to CST as a UK cyber services provider serving mid-market and enterprise clients.
- Pen Test Partners: UK cybersecurity consultancy providing penetration testing, compliance, and consulting services. Comparable as a UK-based cyber services firm of similar scale targeting regulated and enterprise customers.
- WithSecure (formerly F-Secure Business): European-headquartered cybersecurity vendor offering consulting, managed detection, and installation/deployment services. Comparable as a mid-sized cyber services provider with similar bundled offerings.
- Bridewell Consulting: UK-based cybersecurity consultancy delivering advisory, managed security services, and testing. Closely comparable to CST in target market (UK mid-market/enterprise) and service mix of consulting + managed security.
- BSI (Cybersecurity & Information Resilience): UK-based organisation providing cybersecurity consulting, ISO 27001 advisory, and assurance services. Comparable to CST on the governance/compliance cyber advisory side.
Market position
Strengths3 records
Weaknesses3 records
Competitive moat2 records
Key risks4 records
Key highlights3 records
Customer concentration
CST social profiles
Digital presenceCST financial estimates
Financial estimateRevenue estimate
Valuation estimate
CST leadership team
Management profileNumber of profiles
CST funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CST M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CST
What does CST do?
CST provides cyber security services alongside broader IT consulting, installation, and maintenance offerings to organizational customers. As a small Bristol-based firm (11–50 employees) operating since 1995, it delivers these capabilities as professional services rather than as packaged software or hardware products.
When was CST founded?
CST was founded in 1995. It employs 11 to 50 people.
Where is CST based?
CST is headquartered in Bristol, United Kingdom, in the Europe region.
Who are CST's main competitors?
Broad incumbents on record are Trustwave, BAE Systems (Applied Intelligence) and PwC UK (Cyber & Privacy). Direct peers are NCC Group, Pen Test Partners, WithSecure (formerly F-Secure Business), Bridewell Consulting and BSI (Cybersecurity & Information Resilience).
Does CST have an API?
No public API is recorded for CST.
What industry is CST in?
CST's product category is IT Security & Consulting Services. Its primary akta.pro industry code is BPAHAFAF, Privacy, Data Protection & Cyber Governance (GRC). Its NAICS code is 54151 and its SIC code is 8742.