10 Best Cloud Penetration Testing Companies in 2025

As more businesses migrate their infrastructure to the cloud, cloud penetration testing has become a critical service.

Unlike traditional network tests, cloud pentesting focuses on unique attack vectors such as misconfigured services, insecure APIs, and overly permissive IAM (Identity and Access Management) policies.

In 2025, the best companies in this field combine deep knowledge of cloud-native vulnerabilities with a flexible, platform-driven approach to provide continuous, actionable security insights.

Why We Choose It

Cloud environments, particularly multi-cloud setups, present a complex security challenge.

Misconfigurations are the leading cause of cloud security breaches, and automated scanners often miss the subtle, exploitable flaws in how services are connected or configured.

Cloud penetration testing goes beyond automated scans by simulating a real-world attacker’s mindset.

Expert pentesters exploit weaknesses in Amazon Web Services (AWS), Google Cloud Platform (GCP), and Microsoft Azure, uncovering critical vulnerabilities that could lead to data theft, service disruption, or unauthorized access.

How We Choose The Best Cloud Penetration Testing Companies in 2025

We selected the top cloud penetration testing companies for 2025 based on three key criteria:

• Experience & Expertise (E-E): We looked for companies with a proven track record, a deep understanding of cloud service provider (CSP) nuances, and a history of discovering and responsibly disclosing cloud vulnerabilities.
• Authoritativeness & Trustworthiness (A-T): We considered market leadership, industry recognition, and the reputation of their offensive security teams.
• Feature-Richness: We assessed the comprehensiveness of their platforms and services, looking for capabilities in:
• CSP-Specific Expertise: The ability to test for vulnerabilities unique to AWS, Azure, and GCP.
• Continuous Testing: A platform or service model that allows for ongoing security validation as the cloud environment changes.
• Advanced Reconnaissance: The capability to discover all publicly exposed cloud assets.
• Actionable Reporting: Clear, prioritized reports with detailed remediation guidance and re-testing options.

Comparison Of Key Features in 2025

Company	CSP-Specific Expertise	Continuous Testing	Advanced Reconnaissance	Actionable Reporting
NetSPI	Yes	Yes	Yes	Yes
Bishop Fox	Yes	Yes	Yes	Yes
Synack	Yes	Yes	Yes	Yes
Rhino Security Labs	Yes	No	Yes	Yes
Astra Security	Yes	Yes	Yes	Yes
Praetorian	Yes	Yes	Yes	Yes
Coalfire	Yes	Yes	Yes	Yes
Pentera Cloud	Yes	Yes	Yes	Yes
TrustedSec	Yes	No	Yes	Yes
Cobalt.io	Yes	Yes	Yes	Yes

Top 10 Best Cloud Penetration Testing Companies in 2025

• NetSPI
• Bishop Fox
• Synack
• Rhino Security Labs
• Astra Security
• Praetorian
• Coalfire
• Pentera Cloud
• TrustedSec
• Cobalt.io

1. NetSPI

NetSPI is a leader in cloud penetration testing, distinguished by its PTaaS (Penetration Testing as a Service) platform, Resolve.

Its team of experts specializes in finding vulnerabilities in multi-cloud environments, including misconfigurations, overly permissive access, and flaws in container security.

NetSPI’s platform provides real-time visibility into findings, making the entire testing process more efficient and collaborative.

The company’s work with 9 out of 10 of the top banks in the US and the largest cloud providers highlights their trusted expertise.

Why You Want to Buy It:

NetSPI’s Resolve platform streamlines the entire pentest workflow, from scoping to remediation. This makes it an ideal choice for organizations that need to centralize their security findings and measure progress over time.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Specialists in AWS, Azure, and GCP.
Continuous Testing	Yes	PTaaS model with continuous testing and real-time findings.
Advanced Reconnaissance	Yes	Comprehensive external asset discovery.
Actionable Reporting	Yes	In-platform collaboration and detailed reports.

Best For: Large enterprises that need a scalable, continuous, and platform-driven approach to cloud security.

Try NetSPI here → NetSPI Official Website

2. Bishop Fox

Bishop Fox is a top-tier offensive security firm with a strong reputation for its Cloud Penetration Testing services.

The company’s team of highly creative and technical experts, known as “The Fox,” uses cutting-edge, proprietary and open-source tools to simulate real-world attacks.

They excel at identifying complex misconfigurations and attack pathways, providing a truly realistic assessment of an organization’s cloud defenses.

Why You Want to Buy It:

Bishop Fox’s expertise is unmatched. Their testers go beyond standard checks to find sophisticated vulnerabilities that automated tools and less-experienced firms would miss.

They provide insights into the most critical and exploitable attack paths.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Deep expertise across all major CSPs.
Continuous Testing	Yes	Offers a continuous attack surface testing (CAST) model.
Advanced Reconnaissance	Yes	In-depth discovery of cloud-related attack paths.
Actionable Reporting	Yes	Tailored executive and technical reports with prioritized findings.

Best For: Organizations that need a highly customized and technically deep-dive cloud security assessment from one of the most respected offensive security firms.

Try Bishop Fox here → Bishop Fox Official Website

3. Synack

Synack pioneered the PTaaS model and applies its crowdsourced approach to cloud security.

The company can deploy a diverse community of vetted ethical hackers to test cloud environments, providing broader coverage and finding more vulnerabilities in less time than a small, static team.

Synack’s platform can integrate with AWS, Azure, and GCP to automatically detect changes and launch on-demand tests, making it a highly agile solution.

Why You Want to Buy It:

Synack’s model offers unparalleled scalability and speed. The ability to have multiple researchers from around the world testing your cloud environment simultaneously provides a comprehensive, 24/7 security posture.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Integrations with AWS, Azure, and GCP.
Continuous Testing	Yes	On-demand and continuous testing via the Synack Platform.
Advanced Reconnaissance	Yes	Continuous asset discovery with AI-powered validation.
Actionable Reporting	Yes	Real-time reporting and patch verification on the platform.

Best For: Companies that need continuous, on-demand cloud testing and want to leverage the power of a vast, crowdsourced community of elite hackers.

Try Synack here → Synack Official Website

4. Rhino Security Labs

Rhino Security Labs is a highly specialized cloud penetration testing company, widely recognized for its deep expertise in AWS, Azure, and GCP.

The company’s research team has a history of discovering and publishing high-profile cloud vulnerabilities and tools, such as the Pacu cloud exploitation framework.

This research-driven approach ensures that their tests are always up-to-date with the latest attack techniques.

Why You Want to Buy It:

Rhino Security Labs’ services are based on a foundation of cutting-edge research, meaning they’ll uncover vulnerabilities that are not yet widely known.

They are experts in attacking the cloud from the perspective of a sophisticated threat actor.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Core specialization in AWS, Azure, and GCP.
Continuous Testing	No	Focuses on traditional, time-boxed engagements.
Advanced Reconnaissance	Yes	In-depth cloud asset enumeration.
Actionable Reporting	Yes	Detailed reports with clear remediation guidance.

Best For: Organizations with complex cloud environments that want to work with a firm known for its deep technical expertise and contributions to cloud security research.

Try Rhino Security Labs here → Rhino Security Labs Official Website

5. Astra Security

Astra Security offers a comprehensive Cloud Pentest Suite that combines automated scanning with expert human analysis.

The company’s platform runs over 13,000 automated security tests and compliance checks, which are then validated by human pentesters.

This hybrid approach ensures both the speed of automation and the depth of human expertise, making it a highly efficient solution for continuous cloud security.

Why You Want to Buy It:

Astra’s blend of automation and manual testing makes it a cost-effective and efficient way to secure your cloud assets.

The platform simplifies vulnerability management and provides clear, developer-friendly reports to speed up remediation.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Supports AWS, Azure, and GCP.
Continuous Testing	Yes	PTaaS platform with continuous vulnerability scanning.
Advanced Reconnaissance	Yes	Discovers and maps cloud infrastructure.
Actionable Reporting	Yes	Detailed reports with step-by-step remediation advice.

Best For: Small to medium-sized businesses and agile development teams that need a fast, affordable, and continuous cloud security solution.

Try Astra Security here → Astra Security Official Website

6. Praetorian

Praetorian is an offensive cybersecurity company that provides expert-led cloud penetration testing services. They use an adversarial mindset to help organizations prioritize and reduce material risks in their cloud environments.

Praetorian’s services are designed to go beyond simple compliance, focusing on uncovering exploitable vulnerabilities that are most likely to be leveraged by real-world attackers.

The company also offers Continuous Threat Exposure Management (CTEM) to maintain security over time.

Why You Want to Buy It:

Praetorian’s unique approach helps you optimize your security budget by focusing on the vulnerabilities that pose the greatest risk.

Their expertise ensures that you’re not just finding flaws but understanding their potential impact on your business.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Strong expertise across all major CSPs.
Continuous Testing	Yes	CTEM services for continuous security validation.
Advanced Reconnaissance	Yes	Identifies external attack surface and exploitable entry points.
Actionable Reporting	Yes	Provides insights on material risk and strategic recommendations.

Best For: Enterprises that want a strategic partner for offensive security, focusing on real-world risk reduction rather than just compliance.

Try Praetorian here → Praetorian Official Website

7. Coalfire

Coalfire is a cybersecurity services firm with a strong focus on compliance, particularly for FedRAMP, PCI, and SOC 2.

Its cloud penetration testing services are tailored to help organizations meet these stringent regulatory requirements while also strengthening their security posture.

Coalfire’s experts assess cloud configurations, network segmentation, and application security to ensure that both technical and compliance standards are met.

Why You Want to Buy It:

Coalfire’s deep expertise in compliance and its history of working with federal and highly-regulated clients makes it an ideal partner for businesses that need to demonstrate their cloud security posture to auditors and regulators.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Expertise in cloud security for various compliance frameworks.
Continuous Testing	Yes	Offers continuous testing as part of its managed services.
Advanced Reconnaissance	Yes	In-depth cloud asset discovery.
Actionable Reporting	Yes	Detailed reports with a strong focus on compliance requirements.

Best For: Organizations in highly regulated industries that need a cloud penetration test that meets strict compliance standards.

Try Coalfire here → Coalfire Official Website

8. Pentera Cloud

Pentera Cloud offers a unique, automated security validation and one of the core cloud penetration testing companies platform that simulates cloud-native attacks.

Unlike manual penetration testing, Pentera’s solution continuously challenges an organization’s cloud environment, finding exploitable misconfigurations and attack paths without the need for human intervention.

The platform provides a hybrid test, identifying attack vectors that extend across both cloud and on-premises environments.

Why You Want to Buy It:

Pentera Cloud provides a continuous, always-on security assessment, making it an excellent tool for organizations with rapidly changing cloud environments.

Its ability to find exploitable kill-chains between on-premises and cloud systems is a key advantage.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Automated testing for cloud-native vulnerabilities.
Continuous Testing	Yes	Continuous security validation and attack emulation.
Advanced Reconnaissance	Yes	Maps cloud workloads, databases, and identities.
Actionable Reporting	Yes	Evidence-based remediation reports.

Best For: Organizations that need to continuously validate their cloud security controls with an automated, hybrid approach.

Try Pentera Cloud here → Pentera Cloud Official Website

9. TrustedSec

TrustedSec is a well-regarded cybersecurity consulting firm known for its expert-led, hands-on penetration testing services.

Their approach to cloud security is highly customized, with consultants simulating real-world cyberattacks on AWS, Azure, and GCP environments.

TrustedSec is renowned for its detailed reporting and a strong focus on providing clear, prioritized remediation guidance.

Why You Want to Buy It:

TrustedSec’s reputation is built on the expertise of its consultants. If you want a thorough, hands-on assessment from a firm that prioritizes a deep understanding of your unique environment, TrustedSec is an excellent choice.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Specialists in AWS, Azure, and GCP.
Continuous Testing	No	Focuses on traditional, project-based engagements.
Advanced Reconnaissance	Yes	Conducts extensive cloud asset enumeration.
Actionable Reporting	Yes	Detailed, technical reports with remediation advice.

Best For: Companies that value a personalized, white-glove service from a team of highly-skilled and ethical hackers.

Try TrustedSec here → TrustedSec Official Website

10. Cobalt.io

Cobalt.io is a pioneer of the PTaaS model, offering a platform that connects businesses with a global community of vetted security researchers.

For cloud penetration testing, Cobalt’s platform enables organizations to quickly scope and launch engagements, providing access to specialized talent and accelerating the testing process.

The platform centralizes all findings, making it easy to manage and track vulnerabilities.

Why You Want to Buy It:

Cobalt’s platform and crowdsourced model allow you to launch a cloud pentest in days, not months.

The platform’s streamlined workflow and on-demand access to talent make it an efficient way to integrate security into your development lifecycle.

Feature	Yes/No	Specification
CSP-Specific Expertise	Yes	Offers network & cloud security testing.
Continuous Testing	Yes	PTaaS model for on-demand and continuous engagements.
Advanced Reconnaissance	Yes	Identifies and tests the cloud attack surface.
Actionable Reporting	Yes	In-platform dashboards and bug reports.

Best For: Fast-moving tech companies and agile teams that need a flexible, on-demand, and scalable solution for cloud penetration testing.

Try Cobalt.io here → Cobalt.io Official Website

Conclusion

The cloud has fundamentally changed the landscape of cybersecurity, and cloud penetration testing is no longer a niche service it’s a necessity.

The top firms in 2025 are those that have moved beyond traditional testing to embrace the complexities of multi-cloud environments, continuously evolving attack vectors, and the need for speed.

While platforms like NetSPI, Synack, and Cobalt.io offer a modern, efficient PTaaS model, firms like Bishop Fox and Rhino Security Labs provide deep, research-backed expertise for the most critical of cloud environments.

Your choice should align with your organization’s specific needs, whether that is continuous, automated validation, a deep-dive expert assessment, or compliance-focused testing.

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