Cloud penetration testing assesses the security of cloud environments hosted on platforms such as AWS, Microsoft Azure, and Google Cloud Platform. Unlike traditional infrastructure testing, cloud pen testing examines cloud-specific attack vectors including misconfigured IAM policies, overly permissive storage buckets, insecure serverless functions, container escape vulnerabilities, and cloud service misconfigurations.
Testers evaluate identity and access management configurations, network security groups, encryption settings, logging and monitoring gaps, and the security of cloud-native services. Cloud pen testing also covers multi-cloud and hybrid environments where workloads span on-premises and cloud infrastructure.
This testing is essential for organisations migrating to or operating in the cloud, as the shared responsibility model means customers are responsible for securing their configurations and workloads. Cloud pen testing helps organisations meet compliance requirements for SOC 2, ISO 27001, PCI DSS, FedRAMP, and industry-specific regulations while identifying real security risks in their cloud deployments.
UK offensive security consultancy delivering CREST-accredited penetration testing, adversary simulation and CBEST, TIBER-EU and TBEST threat-led testing, mainly for financial services and other large organisations.
Penetration testing firm trusted by nine of the top ten US banks, with the Resolve platform for continuous attack surface management.
US penetration testing firm founded in 2011, running 600+ engagements a year with a fully remote, US-based team. Manual, expert-led testing across web, network, cloud, mobile, wireless, OT/ICS, and AI/LLM. Gartner Sample Vendor for PTaaS.
Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.
Global Big Four professional services firm delivering CREST, CHECK, and CBEST-accredited penetration testing and red teaming services from London, serving the UK's largest enterprises and regulated organisations.
CREST and CHECK-accredited UK penetration testing and managed security provider formed in 2026 from Pentest People, Bulletproof, and Target Defense, with CREST STAR/TLPT-FS capability and the GuardNest vulnerability management platform.
Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.
Full-service London-based cybersecurity consultancy with CREST, CHECK, and NCSC accreditations delivering offensive testing, managed detection, and strategic advisory services.
Global managed security provider with the elite SpiderLabs penetration testing team and deep PCI DSS compliance expertise.
Manchester-based independent cybersecurity consultancy with over 20 years of experience delivering CREST and CHECK-accredited penetration testing, red teaming, and compliance certification services.
CREST and CHECK-accredited UK penetration testing consultancy with CBEST approval, specialising in infrastructure, application, and simulated attack assessments across the public and private sectors.
CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.
AWS, Azure, and GCP all allow penetration testing against your own resources without prior approval for most services. Some services (like DDoS testing) still require pre-approval. Always check the provider's current penetration testing policy.
Professional cloud pen testers typically cover AWS, Azure, and GCP. Some also specialise in other platforms like Oracle Cloud, IBM Cloud, or private cloud environments.
Configuration review (like CIS benchmark checks) identifies misconfigurations against best practices. Cloud pen testing goes further by actively exploiting findings to demonstrate real attack paths and business impact.