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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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French cybersecurity firm offering Red/Blue/Purple team services, SOC, and training
MSSP offering cloud security, compliance, and vCISO services for enterprises.
MDR provider offering SOC-as-a-Service with composable security solutions
UK-based managed SOC/XDR provider with 24/7 monitoring and incident response
Cybersecurity services provider specializing in SOC and security for software cos
Pentesting and red team assessment firm for financial and hi-tech sectors.
Security-first MSP delivering managed IT, cloud, and cybersecurity services in Europe.
Full packet capture platform for network forensics and security investigation.
All-in-one IT security platform for SMBs focused on autonomous monitoring.
APAC-focused pure-play cybersecurity services firm offering MSS, consulting, and R&D.
CREST-accredited penetration testing services for UK organizations
MSSP offering SOC-as-a-Service, red teaming, and incident response globally
Atos Group's tech unit delivering cybersecurity, AI, and advanced computing services.
Digital forensics firm offering data recovery, device analysis, and legal expert reports.
Penetration testing company offering offensive security services via PTaaS
Global cybersecurity value-added distributor connecting vendors and resellers.
Canadian MSP/MSSP providing managed IT and cybersecurity services to SMBs
Managed cybersecurity services firm offering SOC, vCISO, and pen testing to businesses.
UK-based managed cybersecurity division with CREST/CHECK accreditation and 24/7 SOC.
Breach recovery and cyber resilience firm specializing in post-attack response.
Cybersecurity services firm offering end-to-end security solutions for businesses.
MSP-focused provider of NOC, SOC, and white-label Help Desk managed services.
Cloud-native cybersecurity consulting & managed SOC services with GRC focus
MSSP offering managed SIEM, threat intelligence, and incident response for SMBs.
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.