Application Security Services & Managed Testing Solutions

Modern businesses face increasingly sophisticated cyber threats that target applications, APIs, and cloud infrastructure. Osto delivers a unified application security platform powered by AI-driven scanning, real-time threat detection, and managed testing solutions — giving growing startups and scaling enterprises complete visibility, faster remediation, and the confidence to build and operate securely.

Security professionals reviewing application vulnerability scan results on a modern dashboard

Our Application Security Services

Comprehensive application security and managed testing solutions designed to protect your web apps, APIs, cloud infrastructure, and endpoints.

AI Web Vulnerability Scanning

AI-powered scanner that automatically analyzes website security, categorizes vulnerabilities by severity, and delivers detailed remediation guidance — with 2x faster scan execution and scheduled email reporting.

Web Application & API Protection

Real-time threat detection and prevention for all HTTPS traffic, blocking OWASP Top 10 threats, DDoS attacks, bot traffic, and API abuse through a high-performance Nginx reverse-proxy architecture.

VAPT as a Service

Managed Vulnerability Assessment and Penetration Testing service that systematically identifies, validates, and helps remediate security weaknesses across your applications and infrastructure.

Cloud Security Posture Management

Automated discovery and continuous monitoring of security configurations across AWS, Azure, and GCP — providing asset inventories, misconfiguration findings, and step-by-step remediation guidance in a single dashboard.

Zero Trust Network Access

Enforce secure authentication workflows and least-privilege access controls so remote teams can work safely without exposing critical infrastructure to unauthorized access.

Shift Left Security

Integrate security testing early in the development lifecycle to catch vulnerabilities before they reach production, reducing remediation cost and accelerating secure software delivery.

Cybersecurity analyst conducting application penetration testing on a laptop with security tools

Our 5-Step Managed Security Testing Process

Step 1: Discovery & Scope Definition

We map your entire attack surface — web applications, APIs, cloud resources across AWS, Azure, and GCP — establishing a clear scope so no asset is overlooked before testing begins.

Step 2: Automated AI-Powered Scanning

Step 3: Manual Penetration Testing & Validation

Step 4: Prioritized Reporting & Remediation Guidance

Step 5: Continuous Monitoring & Re-Testing

Trusted By Growing Teams

Success Stories

See how startups and scaling enterprises have strengthened their security posture with Osto.

"Osto's AI Web Vulnerability Scanning is a game-changer. We're detecting vulnerabilities 2x faster with incredible accuracy. Their automated remediation guidance saves us hours each week."

Sarah Chen

"Switching to Osto solved our multi-cloud visibility nightmare. Azure, AWS, and GCP all in one dashboard—complete posture management finally works seamlessly for our scaling operations."

Marcus Rodriguez

"Their application security services have transformed how we protect customer data. The Web Application & API Protection is robust, and the Admin Management features give us granular control without complexity."

Emily Watson

"Speed matters in our startup environment. Osto's SSL Certificate Management auto-renews with zero manual intervention. That one feature alone has freed up our tiny team tremendously."

Rajesh Patel

"The Device & Application Control dashboard is intuitive. User-level incident detection, bulk agent notifications, and asset management—everything we needed for comprehensive endpoint security governance."

Linda Thompson

"We've relied on Osto's Secure Server Access with MFA for six months now. Access logs, multi-factor enforcement, and top-accessed-servers insights give us real peace of mind and control in one streamlined platform."

Vikram Gupta

"As a growing B2B SaaS, application security services like Osto's Zero Trust Network Access (ZTNA) keeps our remote workforce secure without complexity. Perfect for scaling enterprises."

James Mitchell

"Osto's AI-Driven Adaptive Web Protection Profiling and Content Filtering caught sophisticated bot attacks we'd never spot manually. The machine learning accuracy rivals tools ten times the price."

Priya Sharma

"Osto's AI Web Vulnerability Scanning is a game-changer. We're detecting vulnerabilities 2x faster with incredible accuracy. Their automated remediation guidance saves us hours each week."

Sarah Chen

"Switching to Osto solved our multi-cloud visibility nightmare. Azure, AWS, and GCP all in one dashboard—complete posture management finally works seamlessly for our scaling operations."

Marcus Rodriguez

"Their application security services have transformed how we protect customer data. The Web Application & API Protection is robust, and the Admin Management features give us granular control without complexity."

Emily Watson

"Speed matters in our startup environment. Osto's SSL Certificate Management auto-renews with zero manual intervention. That one feature alone has freed up our tiny team tremendously."

Rajesh Patel

"The Device & Application Control dashboard is intuitive. User-level incident detection, bulk agent notifications, and asset management—everything we needed for comprehensive endpoint security governance."

Linda Thompson

"We've relied on Osto's Secure Server Access with MFA for six months now. Access logs, multi-factor enforcement, and top-accessed-servers insights give us real peace of mind and control in one streamlined platform."

Vikram Gupta

"As a growing B2B SaaS, application security services like Osto's Zero Trust Network Access (ZTNA) keeps our remote workforce secure without complexity. Perfect for scaling enterprises."

James Mitchell

"Osto's AI-Driven Adaptive Web Protection Profiling and Content Filtering caught sophisticated bot attacks we'd never spot manually. The machine learning accuracy rivals tools ten times the price."

Priya Sharma

"Osto's AI Web Vulnerability Scanning is a game-changer. We're detecting vulnerabilities 2x faster with incredible accuracy. Their automated remediation guidance saves us hours each week."

Sarah Chen

"Switching to Osto solved our multi-cloud visibility nightmare. Azure, AWS, and GCP all in one dashboard—complete posture management finally works seamlessly for our scaling operations."

Marcus Rodriguez

"Their application security services have transformed how we protect customer data. The Web Application & API Protection is robust, and the Admin Management features give us granular control without complexity."

Emily Watson

"Speed matters in our startup environment. Osto's SSL Certificate Management auto-renews with zero manual intervention. That one feature alone has freed up our tiny team tremendously."

Rajesh Patel

"The Device & Application Control dashboard is intuitive. User-level incident detection, bulk agent notifications, and asset management—everything we needed for comprehensive endpoint security governance."

Linda Thompson

"We've relied on Osto's Secure Server Access with MFA for six months now. Access logs, multi-factor enforcement, and top-accessed-servers insights give us real peace of mind and control in one streamlined platform."

Vikram Gupta

"As a growing B2B SaaS, application security services like Osto's Zero Trust Network Access (ZTNA) keeps our remote workforce secure without complexity. Perfect for scaling enterprises."

James Mitchell

"Osto's AI-Driven Adaptive Web Protection Profiling and Content Filtering caught sophisticated bot attacks we'd never spot manually. The machine learning accuracy rivals tools ten times the price."

Priya Sharma
The Osto Difference

Why Choose Osto?

Osto is built for businesses that need enterprise-grade security without the complexity of managing a large IT department.

AI-Powered Detection

Machine learning algorithms deliver 2x faster scans with improved accuracy, catching threats traditional tools miss.

Unified Platform

Manage web app protection, cloud posture, ZTNA, and endpoint security from a single, easy-to-use dashboard.

Multi-Cloud Coverage

Complete posture visibility across AWS, Azure, and GCP in one consolidated inventory — ideal for businesses operating modern cloud-native infrastructure.

Built for Scaling Businesses

Osto is purpose-built for startups and scaling enterprises that need agile, enterprise-grade security without heavyweight overhead.

Meet the Osto Security Team

The people behind your comprehensive cybersecurity protection.

Osto was built with a clear mission: to simplify cybersecurity for new age, fast-moving businesses. As modern organizations increasingly rely on cloud infrastructure and distributed teams, the security challenges they face have grown exponentially — yet many lacked the resources of large enterprise IT departments. Osto was designed to close that gap. Since launch, the platform has grown rapidly — adding full multi-cloud posture management across Azure, AWS, and GCP, AI-powered vulnerability scanning, Zero Trust Network Access, and managed testing capabilities in rapid succession. Today, Osto serves startups, growing businesses, and scaling enterprises with a unified platform that delivers real-time threat detection, continuous posture monitoring, and actionable remediation — all from one streamlined dashboard. The team remains committed to continuous innovation, ensuring every update makes security more accessible, faster, and smarter.

One DashboardUnified visibility across apps, cloud, endpoints, and access
2x Faster ScansAI-powered scanning with improved detection accuracy
3 Cloud PlatformsFull posture management across AWS, Azure, and GCP

Frequently Asked Questions

What does application security do?

Application security protects software applications from threats throughout their entire lifecycle — from development to deployment and ongoing operation. It encompasses practices like vulnerability scanning, penetration testing, secure coding, access controls, and real-time threat monitoring to prevent unauthorized access, data breaches, and exploitation of weaknesses in web apps, APIs, and mobile applications.

What are examples of application security?

What is meant by application security?

What is the difference between application security and SOC?

What is VAPT as a Service and how does it work?

How does AI-powered vulnerability scanning differ from traditional scanning?

Can Osto's platform protect applications across multiple cloud environments?

Is Osto suitable for startups and small teams without a large IT department?

Still Have Questions About Application Security?

Talk to our security experts for a personalized consultation on protecting your applications.

Certified & Trusted

Awards and Recognition

OWASP Top 10 aligned application security certification badge

OWASP Aligned Protection

Security controls aligned with OWASP Top 10 standards

ISO 27001 information security management certified badge

ISO 27001 Aligned Practices

Information security practices aligned with ISO 27001 framework

Multi-cloud security posture management verified badge

Multi-Cloud Security Verified

Verified posture management across AWS, Azure, and GCP

Get a Free Application Security Assessment

Tell us about your applications, cloud environment, and security goals. Our team will review your details and reach out with a tailored security assessment plan — no obligation required.

Contact Us Today

For immediate assistance, feel free to give us a direct call at You can also send us a quick email at connect@osto.one