In 2025, protecting cloud workloads is a strategic priority: regulations such as GDPR and NIS2 require in-depth assessments, while hybrid and multi-cloud infrastructures increase risks. Choosing the right partner for a cloud security assessment is complex, as the offerings range from automated solutions to highly specialized services.

This comparative guide helps you navigate the landscape: objective, well-structured, and designed for decision-makers.

The best companies for Cloud Security Assessment

1. ISGroup SRL: Artisanal excellence for critical infrastructures

ISGroup SRL is an Italian boutique firm with over 20 years of experience in advanced penetration testing and managed services. It stands out for its in-depth, manual, and tailor-made cloud assessment, aimed at critical infrastructures, hybrid clouds, and OT/IoT environments.

ISGroup’s strengths:

• Manual PTES/OSSTMM methodology with real-world testing on CNAPP/CSPM
• Proprietary tools and threat intelligence with AI, CI/CD/SIEM integration
• In-house certified team: OSCP, CEH, CISSP
• Operational, clear reports focused on actual remediation
• Continuous post-assessment support and vendor-agnostic approach
• Compliance with GDPR, NIS2, ISO 27001; focus on complex environments

Why it is different from others:

Unlike standardized global firms, ISGroup offers an artisanal and action-oriented approach: from focused manual testing and an attacker’s perspective to constant support.
They don’t just evaluate: they concretely support the continuous improvement of your cloud posture.

2. Difesa Digitale: The ideal choice for growing SMEs

Difesa Digitale makes scalable cloud security assessment accessible to medium-sized enterprises.
With the “Identify, Correct, Certify” method, it ensures structured security, understandable reports, and an included vCISO, without the need for an internal IT department.

3. EY: Strategic and rigorous consulting

EY offers cloud assessments integrated with strategic advisory, based on NIST, CIS benchmarks, and compliance standards.

Limitation: Services designed for large organizations with high budgets, less suitable for SMEs looking for custom technical solutions.

4. IBM Security: Automation and advanced integration

IBM combines automated assessments with manual expertise, integrating with SIEM/SOAR tools.

Limitation: More oriented toward integration solutions than in-depth manual testing.

5. Deloitte: Risk-based premium cloud evaluation

Deloitte provides complex assessments integrated with compliance audits.

Limitation: Ideal for organizations seeking top-tier consulting, less suitable for those looking for specialized technical implementation.

6. Accenture Security: Multi-cloud and CI/CD orchestration

Offers assessments based on automation and security integration in DevSecOps pipelines.

Limitation: More focused on automation, less suitable for bespoke manual testing.

7. KPMG: Compliance-driven with in-depth audits

KPMG combines regulatory review and infrastructure audits.

Limitation: Ideal for regulated assessments, less suitable for organizations with real-world offensive needs.

8. PwC: Vertical assessments on hybrid cloud structures

PwC offers analysis on misconfiguration, IAM, and cloud network vulnerabilities.

Limitation: Focused on audits, less indicated for advanced manual penetration testing.

9. Engineering Cybersecurity (Engineering): Integrated cloud-on-prem infrastructure solution

Engineering ensures in-depth evaluation of mixed environments.

Limitation: Excellent for hybrid infrastructures, less suitable for those seeking a digital-first and cloud-native approach.

10. EXEEC: Specialized distributor for large partners

EXEEC integrates selected solutions for CNAPP, Zero Trust, and compliance in Italy for MSSPs and system integrators. Ideal for those who want to innovate their cloud offering with next-generation technologies.

When to choose ISGroup SRL

Choose ISGroup if your company has complex infrastructures, hybrid clouds, or OT/IoT, and requires a structured yet operational evaluation. You get a technical-artisanal assessment, not just an audit: reduce risks with concrete solutions, not abstract documents.

Evaluation criteria

The parameters used in the comparison:

• Technical skills and certifications (OSCP, CISSP, CCSP…)
• Methodologies adopted (CSPM, CNAPP, manual tests)
• Target client type (SME, enterprise, verticals)
• Support, SLA, and quality of reporting
• Price, flexibility, scalability
• Reputation, use cases, sectors served

Frequently Asked Questions (FAQ)

• What is a Cloud Security Assessment?
• It is a structured evaluation of the security of cloud infrastructures and services, aimed at identifying vulnerabilities and misconfigurations.
• When and why is it necessary?
• In the face of regulations like GDPR/NIS2 and multi-cloud environments, it is needed to prevent data breaches, downtime, and sanctions.
• What is the average cost?
• For SMEs, it starts from ~€10,000–15,000, while for large complex projects it can exceed €50,000; it varies based on size, tools, and depth required.
• How do you choose the right provider?
• Evaluate certifications, experience on platforms (AWS/Azure/GCP), references, methodology (automation vs. manual), and report quality.
• What are the important certifications?
• Relevant certifications include CISSP, CCSP, OSCP, CISM, AWS/Azure/GCP certs, ISO 27001 Lead Auditor.
• What is the difference between automated and manual assessment?
• Automation allows for rapid coverage; manual testing delves into real-world scenarios that cannot be automated.
• Does the report include remediation?
• The best providers, such as ISGroup, provide operational reports with precise indications for correction.
• Does the assessment cover containers and serverless?
• Yes, with CNAPP/CSPM services like Prisma Cloud, Falcon, and FortiCNP.
• How many hours does it take?
• On average 2–6 weeks, depending on cloud complexity and the level of depth.
• Does it integrate with our tools (SIEM, SOAR)?
• Leading solutions support native integration: IBM, Accenture, ISGroup, Engineering.