Cybersecurity Companies in Bristol: 28 Active Firms (2026)
Cybersecurity companies in Bristol protect organisations with security software, managed services and advisory work across the city-region.
Buying centres tend to sit with IT, security operations, risk and compliance teams rather than a single software budget. Bristol-area suppliers in this segment usually sell to mid-market businesses, regulated operators and public-sector bodies that need evidence of controls as much as tooling. Engagements are commonly framed as recurring monitoring, incident-response readiness, cloud-security reviews or advisory projects tied to procurement and audit cycles. The ideal customer profile points to specialists that can handle security-critical infrastructure without the sales machinery of an enterprise outsourcer: technical delivery, documentation and board-level risk translation all matter.
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Bristol has 28 actively trading cybersecurity companies. Reported headcount stands at 593 employees, so the local footprint is not just founder-led consultancies; it includes employers with delivery teams, service desks and account management capacity. The revenue shape also matters for researchers: only 6 firms clear £5M in turnover, which leaves the city-region weighted towards specialist providers rather than broad outsourcing platforms. That makes comparisons with larger UK cyber clusters awkward, but it also helps isolate suppliers serving regional regulated clients and security-conscious SMEs.
No sector-wide licence sits over most cyber security supply, so obligations usually follow the client, the service, or the incident being handled. GDPR and ICO expectations shape advisory and incident-response work, while the NIS regime applies to essential-service operators and relevant digital service providers such as cloud services. Planned Cyber Security and Resilience Bill reforms would bring medium and large managed service providers further into scope under the Information Commission and shorten breach-reporting expectations. NCSC guidance, techUK's Cyber Exchange and the UK Cyber Security Council provide the main reference points for technical practice and professional standards.
Bristol's cyber market appears likely to remain specialist-led rather than platform-led. The absence of a young-company wave points to an older local base, while the limited scale-up layer suggests that procurement, recruitment and certification costs may keep many suppliers focused on advisory, managed service and cloud-security niches. Demand tends to be steadier where clients have regulated infrastructure or board-level exposure to cyber risk. Consolidation pressure may come from larger service groups seeking regional delivery capacity, but independent specialists should remain visible where trust, proximity and incident response judgement carry weight.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
28
Active firms
2026
6
Above £5M
turnover
0
Recent incorporations
since 2022
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Key facts
About 21% of the trading cohort reports turnover above £5M (6 of 28 firms) — the rest sits below that revenue band.
The Network and Information Systems Regulations 2018 apply to operators of essential services and relevant digital service providers, including online marketplaces, online search engines and cloud computing services.
The ICO is the competent authority for relevant digital service providers and can issue fines of up to £17 million in the most serious cases.
The Cyber Security and Resilience Bill would bring medium and large managed service providers into scope and require quicker reporting of harmful cyber breaches.
Government sector analysis estimates 2,165 active UK firms providing cyber security products and services, £13.2 billion of revenue and approximately 67,300 FTEs.
GOV.UK states that the UK exported £7.2 billion of cyber services in 2023, while a 2026 government factsheet describes the UK as “the most targeted country in Europe for cyber attacks” in 2024.
Top Bristol Cybersecurity companies
Develops a cyber resilience training and simulation platform that provides hands-on cybersecurity labs, cyber‑attack simulations, and crisis exercises. Enables organisations to test incident…
Serves enterprise CISOs, security teams, developers and executives needing cyber resilience readiness, including sectors such as financial services, operational technology and organisations managing…
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Computed from 3 filingsProvides managed cyber security and IT support services, including threat monitoring, incident response, penetration testing, vulnerability assessments, and security consultancy. Also delivers…
Serves UK businesses and public sector organisations, especially finance, legal, healthcare and green energy sectors, with buyers including IT managers, operations leaders and enterprises managing…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 2y
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Provides a cybersecurity training and assessment platform delivering hands‑on labs, cyber attack simulations, and operational drills. Enables organisations to test incident response capabilities,…
Targets enterprise organisations, especially CISOs, security leaders, SOC/red/blue teams, application security and developer teams, plus board stakeholders. Sector focus includes financial services…
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Computed from 5 filingsProvides cybersecurity and identity consulting services focusing on cloud security, identity and access management, and compliance. Implements and supports platforms such as Okta, Auth0 and Microsoft…
Serves government bodies and private-sector organisations, targeting security, identity and IT leaders responsible for cloud, identity access management and compliance programmes, including users of…
Financial Health
StrongStrong · Growing, Hiring · 37% CAGR over 4y
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Computed from 3 filingsProvides consulting and engineering services for security information and event management (SIEM) and observability platforms. Designs, deploys and operates monitoring and data platforms such as…
Serves growing and established businesses with security, observability and IT operations teams that need SIEM, monitoring and data platform support, including Splunk, Sentinel and Cribl users.
Financial Health
StableStable · Profitable · -7% CAGR over 2y
Location
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Computed from 5 filingsProvides managed IT support and cybersecurity services for businesses, including helpdesk support, device and network management, Microsoft 365 and Google Workspace administration, AI and cloud…
Serves B2B customers with 20+ employees, mainly businesses in Bristol, the South West and across the UK that need managed IT, cyber security, AI support and digital compliance.
Financial Health
StableStable · -3% CAGR over 4y
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Computed from 5 filingsProvides governance, risk and compliance consulting services, including GDPR and data protection compliance, ISO 27001 and Cyber Essentials certification support, compliance audits, risk assessments,…
Serves organisations of all sizes across regulated, professional, commercial and technology sectors, including healthcare, financial services, legal, charities, retail/ecommerce, education, logistics…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
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Computed from 5 filingsProvides technology and digital transformation consultancy for organisations in defence, national security and critical infrastructure. Services include strategy and policy development, AI and data…
Serves senior leaders in UK defence, national security and critical infrastructure organisations, plus businesses seeking guidance on digital, AI, data governance and technology transformation.
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
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Computed from 5 filingsProvides managed IT support, cybersecurity services, cloud and digital transformation, IT infrastructure management, structured cabling, VoIP and Teams communications systems, mobile device…
Serves businesses in Bristol, the South West, the Midlands and Wales that need managed IT, cybersecurity, cloud, infrastructure and communications support for their teams and operations.
Financial Health
HealthyHealthy · Hiring · 2% CAGR over 4y
Location
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Computed from 4 filingsProvides managed IT services and technical support for businesses, including cloud hosting and migration, cybersecurity, backup and disaster recovery, network connectivity, telecoms, and Microsoft…
Serves businesses in South West England and Wales, from small businesses to enterprises, across a broad range of industries needing IT support, managed services, cloud, connectivity and cyber…
Financial Health
StableStable · -77% CAGR over 3y
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Computed from 2 filingsProvides managed IT services including cloud infrastructure, cybersecurity, enterprise networking and telecoms. Offers cloud migration, virtualisation, disaster recovery, process automation, and…
Serves B2B organisations, from small businesses to large enterprises, plus non-profits, across various industries needing secure, compliant cloud and IT operations support.
Financial Health
DistressedDistressed · -9% CAGR over 1y
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Computed from 5 filingsProvides managed IT support and consultancy for businesses, including network infrastructure setup and monitoring, cybersecurity, cloud services such as Microsoft 365 and Azure, VoIP phone systems,…
Serves SMEs and sole entrepreneurs in the South West UK, from one-person firms to teams of around 100, with a separate focus on education-sector clients.
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides managed IT services for businesses, including service desk support, infrastructure monitoring, cloud services using Microsoft Azure, disaster recovery, cybersecurity, and IT procurement, as…
Serves businesses and organisations across the South West, including growing SMEs, charities, community organisations and local business teams needing outsourced IT support and technology management.
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StableStable · 0% CAGR over 2y
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Computed from 5 filingsDevelops and supplies digital security software and hardware, including software copy protection and licensing systems, multi-factor authentication tools, FIDO security keys, OTP tokens, smart cards,…
Serves B2B customers globally, from independent software companies to multinational corporations, including software vendors, IT/security teams and organisations managing user access control and…
Financial Health
StableStable · 0% CAGR over 4y
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Computed from 3 filingsDevelops identity and access management software that automates user account provisioning, role-based access control, password management and single sign-on. Provides cloud-based tools for managing…
Serves B2B and public-sector organisations, especially education, financial services, government, healthcare, nonprofits and MSPs, targeting IT and HR teams managing staff access and user accounts.
Financial Health
HealthyHealthy · -11% CAGR over 2y
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Computed from 2 filingsDevelops enterprise governance, risk and compliance (GRC) software that helps organisations manage regulatory requirements, audits, third‑party risk and operational risk. Platform provides analytics,…
Serves large enterprises and government agencies, particularly risk, compliance, audit, IT security, ESG, resilience and third-party risk teams.
Financial Health
DistressedDistressed
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Computed from 4 filingsDevelops software for compliance and security in unified communications platforms, capturing, archiving and analysing voice, video, chat and other collaboration data. Provides tools for supervision,…
Serves regulated enterprises and public-sector organisations, especially financial services, state and local government, telemedicine, education and manufacturing teams responsible for communications…
Financial Health
StrongStrong · Hiring · 52% CAGR over 3y
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Develops identity and access management software for enterprises. Provides a platform for authentication, single sign‑on, identity governance, API security, and user access control to secure digital…
Sells to large enterprises and digital organisations, targeting IT, security and identity teams responsible for customer, workforce and partner access across complex technology ecosystems.
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Provides consulting and implementation services for SAP security, risk, identity and governance (GRC) systems. Offers cyber risk assessments, system design, upgrades, managed support, and regulatory…
Serves SAP-using organisations worldwide, from large enterprises running S/4HANA to smaller businesses new to SAP, across diverse industry sectors with cyber, risk, identity, compliance and…
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N/AN/A
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Computed from 3 filingsProvides a cloud-based application security and risk management platform that scans software for vulnerabilities across the development lifecycle, including static and dynamic testing, open‑source…
Serves B2B software and security teams, from startups to Fortune 500 enterprises, targeting CISOs, AppSec leaders, developers and security teams in financial services, public sector, healthcare,…
Financial Health
StableStable · Profitable · -7% CAGR over 2y
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Provides managed IT services for enterprises including mainframe operations, cloud infrastructure management, application and data modernization, migration to hybrid and public cloud, database…
Serves large enterprises and IT leaders with mission-critical mainframe, IBM Power, hybrid cloud, data centre, security, data and AI environments, including organisations using AWS, Microsoft,…
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Computed from 5 filingsProvides managed IT services including outsourced and co-managed IT support, cloud infrastructure design and migration, cybersecurity services, and technology transformation projects such as software…
Serves businesses across Bristol and the South West, including software, aerospace, professional services, consultancy, technology and defence firms, with buyers such as IT leaders and management…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
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Computed from 3 filingsProvides cyber security and information security consulting, including ISO 27001 readiness and audits, security testing, incident response, identity and access governance, privacy and third‑party…
Serves B2B organisations seeking digital risk, cyber security, privacy, governance and assurance support, including start-ups, regulated businesses and teams needing ISO 27001, SWIFT or third-party…
Financial Health
StableStable · Hiring · 58% CAGR over 2y
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Computed from 5 filingsDevelops hardware-based cybersecurity technology that secures industrial and control-system communications. Provides packet-level authentication, encryption and zero-trust enforcement devices that…
Targets defense agencies, critical infrastructure operators and industrial organisations running OT, control and edge systems in high-assurance or disconnected environments.
Financial Health
WeakWeak · Hiring · 12% CAGR over 4y
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Computed from 5 filingsProvides IT consulting and managed services focused on cyber security, cloud infrastructure, networking and data resilience. Designs and implements security controls, threat detection, compliance…
Serves IT, security and operations leaders at UK businesses with complex cyber, cloud, infrastructure and operational resilience requirements, including leisure, retail, hospitality, financial…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 33% CAGR over 4y
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Computed from 3 filingsProvides managed IT support for small and medium-sized businesses, including network and hardware management, cloud services using Microsoft 365, backup and disaster recovery, cybersecurity…
Serves small and medium-sized businesses in Bristol, typically with 5–300 computers, including firms in financial services, legal, property and other professional sectors.
Financial Health
StrongStrong · -4% CAGR over 2y
Location
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Computed from 3 filingsProvides managed IT support and technology services for businesses, including network monitoring, IT support packages, cloud and Microsoft 365 management, cybersecurity, backups, telephony systems,…
Serves SMEs and schools in Bristol and the South West, including organisations without dedicated in-house IT teams and businesses looking to outsource technology management.
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 2y
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Provides engineering and technical services for space and security sectors, including space systems engineering, ground segment and mission operations support, cybersecurity services, security…
Serves institutional and commercial clients in the space sector, alongside government and enterprise technical, security and programme teams responsible for demanding, mission-critical engineering…
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Computed from 3 filingsProvides cybersecurity certification services including Cyber Essentials, IASME and ISO 27001 support, alongside vulnerability assessments, penetration testing, managed threat detection, incident…
Serves B2B organisations seeking cyber security certification and assurance, including non-technical business owners, IT specialists, technical teams and resellers with UK or international compliance…
Financial Health
WeakWeak · -25% CAGR over 2y
Location
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Computed from 5 filingsProvides managed IT services and cloud desktop solutions including virtual desktop infrastructure, hosted desktops, and Windows 365 environments. Also offers cybersecurity support, compliance-focused…
Serves regulated B2B organisations, especially financial services firms and operators of critical national infrastructure, targeting IT, compliance and risk leaders within these sectors.
Financial Health
HealthyHealthy · Growing, Hiring · 41% CAGR over 4y
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Computed from 5 filingsProvides IT support and managed IT services for small and medium‑sized businesses, including network management, cybersecurity, data backup and recovery, Microsoft 365 support, cloud services,…
Serves B2B SME customers in Bristol and the South West, especially engineering, industrial, trades, telecommunications and utility construction businesses needing outsourced IT and related technology…
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 5y
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Computed from 5 filingsDesigns and manufactures chip‑based quantum security hardware, including quantum key distribution (QKD) systems and quantum random number generators (QRNG). Products provide cryptographic key…
Serves B2B and public-sector buyers in defence, finance, telecoms, critical infrastructure, satellite communications and data centres that need high-security protection for networks, devices and…
Financial Health
StableStable · -6% CAGR over 4y
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Computed from 5 filingsProvides managed IT support and outsourced IT services for businesses, including network management, cyber security, data backup, technical consulting, and assistance with Cyber Essentials…
Serves businesses in Bath, Bristol and surrounding areas that need outsourced IT support and cyber security, including firms seeking strategic technology input for leadership teams.
Financial Health
StrongStrong · Growing, Hiring · 37% CAGR over 4y
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Computed from 5 filingsProvides enterprise, project, and cyber security risk management software delivered as SaaS or on‑premise, including tools for risk identification, assessment, reporting and mitigation tracking,…
Serves B2B and public-sector risk, project and cyber governance teams in aerospace and defence, construction and infrastructure, financial/professional services, government, energy and utilities.
Financial Health
HealthyHealthy · -4% CAGR over 4y
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Computed from 5 filingsProvides IT consultancy and managed IT services including network and endpoint monitoring, cloud and infrastructure deployment, backup and recovery, email and connectivity solutions, and…
Serves B2B customers ranging from small and medium-sized enterprises to multinational corporations, targeting organisations that require outsourced IT, cybersecurity, infrastructure and technology…
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 4y
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Computed from 5 filingsProvides IT consulting and managed services including infrastructure design and operation, cybersecurity, cloud and virtualisation, digital workplace support, systems and network management, and data…
Serves B2B clients, from key accounts to SMEs, across sectors including banking and telecoms, targeting organisations with significant IT infrastructure, data, digital workplace and systems support…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
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Computed from 3 filingsProvides managed IT services, cloud consulting and cyber security services based on Microsoft technologies. Implements and supports Microsoft 365, Azure and security platforms, and develops business…
Serves UK organisations using Microsoft cloud, including businesses and charities, with buyers in IT, security and operations roles seeking a Microsoft-focused MSP/MSSP partner.
Financial Health
WeakWeak · Hiring · 8% CAGR over 2y
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Computed from 5 filingsProvides IT support and cybersecurity services, including managed support packages. Supplies broadband and leased lines, business telephone systems, web hosting, web design and marketing services,…
Serves businesses, particularly around Bristol, that need outsourced technology, communications, hosting, cyber security, marketing and IT supply support.
Financial Health
WeakWeak
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Computed from 3 filingsProvides outsourced IT support and managed services for businesses, including network infrastructure deployment, cybersecurity monitoring, backup and disaster recovery, Microsoft 365 and cloud…
Sells to businesses needing outsourced IT support, cybersecurity, backup, cloud, broadband and hosting services, particularly organisations across South West England seeking managed infrastructure…
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 2y
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Computed from 3 filingsProvides IT and data management services including data storage, backup and secure cloud solutions, remote monitoring, networking, server infrastructure, Microsoft 365 and Azure support, SharePoint…
Serves businesses and organisations with significant data management needs, particularly IT teams managing enterprise data across data centres, cloud, hybrid, Microsoft 365/Azure and SharePoint…
Financial Health
StableStable · -7% CAGR over 2y
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Computed from 5 filingsProvides managed IT services including IT support, network management, cybersecurity, hosting, disaster recovery, and hosted phone systems. Offers monitoring, backups, cloud and server hosting,…
Serves UK businesses, particularly SMEs, with stated experience supporting professional services firms and creative agencies that want outsourced IT, cybersecurity, hosting and telecoms support.
Financial Health
WeakWeak · -3% CAGR over 4y
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How Bristol Cybersecurity companies work and how to sell to them
What they do
Revenue usually mixes recurring service retainers with project work. Bristol cybersecurity suppliers may run monitoring desks, manage detection workflows, prepare incident-response playbooks, review cloud estates, test applications or provide board-facing risk advice. Pricing tends to follow the unit being protected: per user, device, workload, site, log volume or retained service scope. Advisory work is more often fixed-fee or day-rate, while managed services are sold on annual or multi-year terms with service levels and reporting duties attached. Many firms also package software licences, documentation and response support together, because clients want evidence that controls are being maintained rather than a one-off technical report.
Who they sell to
Buyers are usually organisations where cyber risk has reached the board agenda but security teams remain relatively lean. Typical accounts include mid-market companies, public-sector bodies, regulated operators and SMEs with customer data, operational systems or procurement obligations to protect. Initial sponsors tend to be CISOs, heads of IT, CTOs, risk directors, data-protection leads or operations leaders; CFOs and procurement teams often become involved once the work becomes recurring. Smaller assessments can be bought through direct referral or a short proposal cycle. Managed service, incident-retainer and public-sector work more often moves through security questionnaires, procurement frameworks, RFPs and evidence reviews.
What they buy
Most cybersecurity firms tend to spend on systems that help them deliver repeatable assurance while protecting client information. Useful categories include CRM, proposal and quoting software, contract management, subscription billing, ticketing, service-desk tooling, workflow automation, evidence management, analytics, training systems and secure collaboration. Delivery teams may also need cloud infrastructure, log handling, test environments, endpoint management, identity controls and documentation platforms. Services spend often sits around recruitment, technical certification, legal review, insurance, accounting, bid writing and sector marketing. Sellers should expect close scrutiny of access controls, audit trails, data location, support commitments and how their own staff handle sensitive client material.
Why and how to sell to them
Pain is often operational rather than purely technical. Cybersecurity buyers tend to evaluate vendors when client audits become harder to service, recurring contracts start to strain delivery teams, a new managed service needs clearer reporting, or regulatory changes under GDPR, ICO expectations or the NIS regime raise the evidence burden. Hiring a senior sales, operations or compliance lead can also signal intent, as can a move into public-sector or regulated-client work. Outbound works better when it is specific: show how the offer reduces time spent on assurance, improves margin on retained services, shortens tender responses or gives technical teams less administrative work without diluting control.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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