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Cybersecurity service providers are the firms you bring in when you need hands and expertise rather than another tool: managed detection and response, penetration testing, vCISO and advisory, incident response, and compliance work. For teams that cannot hire fast enough, the right partner is often the difference between a control on paper and one that actually runs. The hard part is matching scope, specialization, and trust.
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UK-based MSSP offering CTI, MDR, incident response, and security consulting.
Global tech consulting firm providing transformation services and solutions
CREST-certified PTaaS platform for continuous penetration testing and compliance.
Celerium provides active cyber defense solutions via its Cyber Defense Network platform.
Offensive security firm providing pentesting and attack surface management
Italian MDR provider offering CTI, incident response, and SecOps platform.
Managed IT and cybersecurity services for regulated industries with SIEM focus.
Managed security services provider with xMDR solutions and global SOCs
Global tech provider offering cloud, cybersecurity, and managed services
Cybersecurity services provider offering assessments, pentesting, and advisory
Australian offensive security firm offering pentesting, red teaming & IR.
Managed cybersecurity services provider offering SOC, MDR, EDR, and compliance support.
Ontario-based MSP offering managed IT, cloud, and cybersecurity services.
MSSP offering MDR, SOC-as-a-Service, and managed firewall solutions.
PtaaS provider combining a SaaS platform with vetted pentesters for offensive security.
Managed IT services provider offering cybersecurity and cloud solutions to UK SMEs.
UK-based MSP/MSSP offering managed IT, connectivity, and cybersecurity services.
Swiss cybersecurity firm offering pentesting, red teaming, MDR, and IR services.
German MSSP offering SIEM, Cyber Defense Centers, ISMS, and security training.
Global IT solutions provider offering consulting, implementation, and managed services
MSP delivering managed IT, cybersecurity, and cloud services to SMBs in North America.
Colorado MSP delivering managed IT, cloud, and cybersecurity services to SMBs.
MSP providing security, compliance, and managed IT services to SMBs
Managed IT services provider offering NOC/SOC, cloud, and cybersecurity services.
The 444 providers in this directory span six service categories. Each type has different strengths, pricing, and ideal customer fit. Use the cards below to match your need to the right service.
Managed Security Service Providers
Outsourced security operations: SIEM monitoring, firewall management, vulnerability scanning, basic threat response.
Managed Detection & Response
24/7 SOC analysts actively hunting threats and executing response actions, on the provider's tech stack.
Penetration Testing Companies
Simulated attacks to find vulnerabilities before real adversaries do, scoped to your assets.
Virtual / Fractional CISO
Fractional senior security leadership, typically 1–4 days/month, for strategy without a full-time hire.
IR Firms & Retainers
Specialists you engage when an attack is in progress, often pre-contracted via retainers for response-time SLAs.
GRC & Compliance Consultants
Design, implement, and maintain controls for SOC 2, ISO 27001, HIPAA, PCI DSS, FedRAMP, NIST CSF.
Match the service to the need
Common questions about finding cybersecurity service providers.
The directory includes 444 service providers across Managed Security Service Providers (MSSPs), Managed Detection and Response (MDR) firms, penetration testing companies, virtual CISO (vCISO) services, incident response teams, and compliance consultants covering SOC 2, ISO 27001, HIPAA, and PCI DSS.
An MSSP (Managed Security Service Provider) typically offers broad outsourced security operations including SIEM monitoring, firewall management, and compliance support. An MDR (Managed Detection and Response) provider specializes in 24/7 threat detection and active incident response, often with their own technology stack. MDR is more focused on detecting and stopping attacks; MSSPs offer wider but sometimes shallower coverage.
A virtual CISO (vCISO) is ideal for organizations that need senior security leadership but cannot justify a full-time hire. Common scenarios: companies under 500 employees, organizations preparing for SOC 2 or ISO 27001, businesses scaling rapidly, and teams needing board-level security reporting. A full-time CISO typically makes sense at 500+ employees or in highly regulated industries.
Penetration testing costs vary widely based on scope. Web application pen tests typically range from $5,000 to $25,000. Network pen tests range from $10,000 to $50,000+. Red team engagements can exceed $100,000. Pricing depends on attack surface size, depth (black box, gray box, white box), and reporting requirements. Always request scoped quotes from at least 3 providers.
Evaluate on five criteria: (1) Specialization match — MSSP, MDR, pentest, vCISO, IR, or compliance; (2) Certifications — SOC 2, ISO 27001, CREST, OSCP for individual testers; (3) Industry experience — healthcare, fintech, SaaS, government; (4) Geographic and language coverage; (5) Pricing model — retainer, project-based, or per-incident. Always check client references and request sample reports.
SaaS startups typically need a vCISO for strategic guidance, an MSSP or MDR for monitoring once they have meaningful customer data, and a penetration testing firm for annual compliance and customer assurance. Compliance consultants help with SOC 2 Type II, the most common framework for SaaS companies. Filter providers by service type to compare options.