VAPT as a Service
End-to-end vulnerability assessment and penetration testing delivered as a managed service, giving MSPs continuous offensive security coverage without building an in-house red team.
Osto delivers rigorous external penetration testing built specifically for Managed Service Providers operating across the US. From identifying exposed attack surfaces to validating your clients' defenses against real-world threats, our structured methodology helps MSPs demonstrate security value, satisfy compliance requirements like SOC 2 and NIST, and close security gaps before adversaries exploit them.
Comprehensive offensive security services designed to uncover and remediate external threats before attackers do.
End-to-end vulnerability assessment and penetration testing delivered as a managed service, giving MSPs continuous offensive security coverage without building an in-house red team.
Machine learning-powered scanner that automatically analyzes all external-facing domains, categorizes vulnerabilities by severity, and delivers prioritized remediation guidance with 2x faster scan execution.
Deep-dive external testing of web applications and APIs, identifying OWASP Top 10 risks, injection flaws, and exposed endpoints that could be exploited by external threat actors.
Integrates security testing early in the development pipeline, enabling MSPs to identify and remediate vulnerabilities during build phases before they become exploitable external attack vectors.
External threat simulation targeting endpoint exposures, validating EDR effectiveness and identifying gaps in how client endpoints respond to real-world external attack scenarios.
AI-driven threat detection layer that simulates adversarial attack patterns against external infrastructure, providing MSPs with intelligent insights into emerging threat vectors and blind spots.
We collaborate with your MSP team to define the exact external attack surface—IP ranges, domains, APIs, and cloud-exposed assets—and establish clear rules of engagement aligned with US compliance frameworks like NIST SP 800-115 and SOC 2 requirements.
See how Managed Service Providers across the US have strengthened client defenses with Osto's external pen testing.
MSPs across the US rely on Osto for offensive security that is thorough, actionable, and built for the way modern service providers operate.
Our testing frameworks are purpose-built for MSPs, accounting for multi-tenant environments, shared infrastructure, and the compliance obligations US service providers face.
Machine learning algorithms deliver 2x faster scan execution with improved detection accuracy, reducing false positives so your team remediates real risks—not distractions.
Every engagement is mapped to recognized US frameworks including NIST, SOC 2, and OWASP, ensuring findings translate directly into evidence your clients can use for audits and certifications.
Reports deliver prioritized, step-by-step remediation guidance—not raw data dumps—so MSPs can communicate risk clearly to clients and resolve vulnerabilities faster.
Cybersecurity specialists dedicated to protecting MSPs and their clients.
Osto was built on a single conviction: growing businesses and the MSPs that serve them deserve enterprise-grade security without the complexity of an enterprise security team. Since launching, Osto has rapidly evolved from a web application protection platform into a comprehensive cybersecurity ecosystem covering AI-powered vulnerability scanning, multi-cloud posture management across AWS, Azure, and GCP, Zero Trust Network Access, and rigorous external penetration testing. Serving Managed Service Providers across the United States, Osto understands the unique pressure MSPs face—managing security for multiple clients while staying ahead of a threat landscape that never stops changing. Every feature, every update, and every engagement is designed to give MSPs the offensive and defensive security capabilities they need to protect their clients and grow their business with confidence.
External penetration testing simulates real-world attacks against your internet-facing infrastructure—domains, IPs, APIs, and cloud services—to find exploitable vulnerabilities before adversaries do. For MSPs, it is essential because you manage security for multiple clients simultaneously. A single undetected external exposure in your own infrastructure or a client's environment can lead to widespread breaches, reputational damage, and breach of contract obligations.
Talk to an Osto security specialist for a no-obligation consultation tailored to your MSP.
Osto delivers external penetration testing services to Managed Service Providers across the United States, remotely and on-site.
Remote & On-Site
Service Model
US-Wide Coverage
Availability
Dedicated MSP Team
Support
Reach out to confirm coverage and schedule your MSP's external penetration test.
Penetration testing methodology aligned with OWASP standards.
Engagements structured to support NIST cybersecurity compliance.
Reports formatted to support SOC 2 Type II audit evidence.
Fill out the form below and an Osto security specialist will reach out within one business day to discuss your scope, timeline, and how we can tailor an external penetration testing engagement for your MSP and your clients.
For immediate assistance, feel free to give us a direct call at You can also send us a quick email at connect@osto.one
For immediate assistance, feel free to give us a direct call at You can also send us a quick email at connect@osto.one