Application Security Services

Manual application security testing by OSCP/OSEP-certified engineers. We find the business-logic, auth-flow, and chained-exploit bugs your SAST/DAST scanner reports as 'no issues found.' 2-3 weeks. OWASP-aligned.

200+ apps tested · OWASP ASVS · OSCP / eWPTX certified · Clutch 5.0★
Free consultation · No commitment · Response within 24h
Let's Talk Security

Email us at hello@bsg.tech. We respond within one business day. No commitment required.

Your applications handle sensitive data. Our app security services find vulnerabilities before attackers do—with manual testing by OSCP, eWPTX, and eMAPT-certified experts, comprehensive reporting, and a 90-day free retest guarantee.

Trusted By

What We Test

BSG delivers expert app security services—including application pentesting, security assessments, and secure code review—that uncover vulnerabilities before attackers do. Our appsec testing combines automated scanning with deep manual testing to identify security weaknesses across web applications, mobile apps, REST/GraphQL APIs, and embedded systems. Coverage aligns with OWASP ASVS Level 2, OWASP API Security Top 10, and OWASP MASVS — the standards your auditors, enterprise customers, and security review questionnaires expect.

Our Testing Approach

We don't just run scanners—our OSCP and eWPTX-certified security experts perform thorough manual penetration testing, threat modeling, and architecture review to find the vulnerabilities that automated tools miss. You get actionable findings, clear remediation guidance, executive and technical reports formatted for SOC 2, ISO 27001, PCI DSS, HIPAA, and GDPR audit evidence — and a 90-day free re-test guarantee.

Application Security Services We Offer

Web Application Pentest

Web Application Pentest

Comprehensive testing of web applications against OWASP Top 10 and ASVS, business logic flaws, authentication and session vulnerabilities. Our team holds Burp Suite Certified Practitioner and eWPTX certifications. Black-box, gray-box, and white-box approaches with manual exploitation beyond automated scanners.

Mobile App Pentest

Mobile App Pentest

iOS and Android application security testing against the OWASP MASVS standard. We assess client-side storage, transport security, runtime tampering, and platform-specific weaknesses. Team holds eMAPT certification for mobile-focused engagements.

API Security Testing

API Security Testing

REST and GraphQL API testing covering authentication, authorization, input validation, rate limiting, and business logic. Coverage aligned with OWASP API Security Top 10. Suitable for both public APIs and internal service mesh assessments.

Security Architecture Review

Security Architecture Review

Expert evaluation of your application architecture against security best practices and real-world attack patterns. We review authentication, authorization, data protection, cryptography, and integrations to identify design-level security gaps before deployment.

Threat Modeling Assessment

Threat Modeling Assessment

Systematic threat analysis of your application design. We identify attack vectors, model adversary capabilities, assess risk levels, and deliver prioritized security requirements. The deliverable: a comprehensive threat model with actionable remediation roadmap that your team can implement immediately.

CI/CD Security Review

CI/CD Security Review

Assessment of your pipeline security configuration and automated testing coverage. We evaluate SAST, DAST, SCA, and container scanning effectiveness, identify gaps in security gate coverage, and assess whether your security automation is actually catching vulnerabilities. Deliverable: prioritized recommendations to improve DevSecOps maturity.

Secure Code Review

Secure Code Review

White-box security audit combining automated static analysis with expert manual review of critical code paths. We identify vulnerabilities that dynamic testing misses: authentication bypasses, authorization flaws, cryptographic weaknesses, injection vulnerabilities, and business logic errors. Deliverable: prioritized findings with remediation guidance.

Project Details

Duration

AppSec assessment project takes from 2 to 3 weeks to complete.

Team

From 2 to 3 appsec professionals.

Supervision

Managed by the AppSec Lead, coordinated by the Project Manager.

Suitable for

Suitable for

  • Web applications
  • Software as a Service
  • API web services
  • Mobile apps
  • IoT devices
  • Desktop applications
Applicable to

Applicable to

  • Meet compliance requirements on vulnerability management
  • Find and fix application security bugs in your software code
  • Lower the risks of data breaches, service disruptions, and bad publicity
  • Test the efficiency of Secure Software Development Lifecycle
  • Measure the effectiveness of your application security investment

Project Results

  • Immediate reports of all Critical application security bugs
  • A high-level Executive Summary for top management and clients
  • A non-confidential Attestation Letter to demonstrate your appsec effort
  • The report with all findings and clear recommendations on fixing them
  • The evidence, descriptions, and steps to reproduce for all findings
  • You are eligible for a free retest of all findings once you fix them

Pricing

Application Security Services

  • Learn how to protect your software from malicious hackers
  • Test your application for security vulnerabilities, find and fix security bugs
  • Get a concise report with all findings and recommendations
  • Get a discount for all recurring services

Finding the same vulnerabilities every test? Application Security Engineering prevents vulnerabilities by embedding security into your SDLC.

Explore Prevention-First Security →

Why Choose BSG for Application Security Services?

Qualification
Proven Track Record

12+ years delivering app security services, 200+ apps tested for 100+ clients across fintech, SaaS, and healthcare.

Free retests
Free retests

Free remediation validation of all findings in your security report within 90 days.

Discount
15% discount

Save 15% on recurring security assessments and training engagements.

Certified professionals
Certified Appsec Experts

OSCP, Burp Suite Certified Practitioner, eWPTX, eMAPT, CISSP-certified application security professionals.

Professional insurance
Professional insurance

Worldwide professional liability coverage protecting your security investments.

Manual assessments
Manual Testing First

Expert manual testing finds what scanners miss: business logic flaws, auth bypasses, and chained vulnerabilities.

Testimonials

Working quickly toward initiating fixes, Berezha Security Group doesn't waste time. Their in-depth reporting stands out, as does their commitment to delivering high quality. Future customers will encounter a timely, energetic partner.

Roman Kasumov

Head of Software Development, Credo Bank

Berezha Security Group was thorough in their approach, covering multiple angles and communicating clearly with the internal team. They performed so well that they're now set to return for a second project.

Christian Buerger

CEO, Vispato

The testing helped locate and resolve bugs in the client's system, meeting the expectations of the internal team. Berezha Security collaborates effectively with the client. The team leverages their technical expertise and experience to ensure a successful project.

Serhii Kokhan

Senior Security Engineer, Conductor

Our Certifications

Our team holds the industry's most demanding security certifications, independently validating expertise in penetration testing, application security, cybersecurity consulting, and red team operations.

Discover how our security engineering team can protect your business

Every software product earns malicious hackers’ attention one day: be it script-kiddies, cyber criminals, or nation-state APTs. And while there is virtually no way to make software unbreakable, it is worth trying to make those hackers work so hard that they would rather skip to another target.

Ihor Bliumental

IHOR BLIUMENTAL

Senior Consultant & AppSec Lead

Frequently Asked Questions

We already use a SAST/DAST/cloud scanner — why also pentest?

Automated scanners are great at scaling coverage of known vulnerability classes, but they miss the bugs that matter most: business-logic flaws, broken authentication, and chained exploits all require human reasoning to discover. Independent benchmarks like the OWASP Benchmark project show even the best scanners reliably find only a fraction of OWASP Top 10 issues. We recommend running both: tools for breadth and continuous coverage, BSG for the depth-of-finding that pre-launch, pre-audit, and post-incident assessments demand.

Can AI / AutoFix replace your engineers?

AutoFix and AI-suggested patches solve the symptom in code, but they cannot tell you which architectural decision introduced the class of vulnerability, and they will not detect a missing security control that was never written in the first place. Our threat modelling and architecture review address the root cause: the design decisions that produce vulnerable code. AI is a useful productivity layer for your developers; it is not a substitute for an independent security assessment.

Can scanner-only assessments meet our SOC 2 / ISO / PCI evidence needs?

Scanner output is necessary but not sufficient. Auditors expect a signed human report attesting to the scope, methodology, findings, and remediation status, not a Jira export of CVE scores. BSG delivers an executive summary, attack narratives, and a non-confidential attestation letter your auditor can attach as evidence, alongside the technical findings. We have supported SOC 2, ISO 27001, and PCI DSS evidence requirements across fintech, SaaS, and healthcare clients.

What are application security services?

We offer application penetration tests for web, mobile, and native applications, and application security assessment services of the secure development lifecycle. Most of our time we spend on the web and mobile application penetration testing. Our application pentests include cloud security assessments and network pentests of the application infrastructure.

What is application security penetration testing?

Web and mobile application pentesting is an application security service conducted by appsec experts to find and fix software security bugs. Unlike DAST or SAST scan, application pentest is performed manually by skilled security professionals. We ensure high-quality application pentest results by a creative testing approach, profound business logic analysis, comprehensive planning based on the application threat model, and the optimal project team composition.

How much does an application security penetration test cost?

We charge only for the time we spend doing the job. We do not add extra cost because of how big your business is or how much money it makes. Project prices vary from 4000 to 12000 USD, the average being roughly 7500 USD. All our customers get a free retest of all the vulnerabilities. We offer a discount for recurring services and a volume discount to regular clients.

How long should an application security penetration test take?

The application pentesting duration depends solely on the scope size: how many functions, endpoints, and user roles there are to pentest. A typical application pentest project takes about 2-3 weeks to complete. The report with the application pentest conclusions, vulnerabilities, and recommendations comes during the following week.

Do you do cloud security assessments as well?

We do cloud security assessments and we include a cloud security review in each application security pentest. During this project phase, we search for security vulnerabilities and security misconfigurations in your AWS, Azure, or GCP infrastructure, and ensure it meets the applicable cloud security recommendations and best practices.

How do you approach application security consulting?

Our application security consulting engagements begin with understanding your development processes, technology stack, and compliance requirements. We then design a tailored security program that may include threat modeling, secure architecture review, SDL integration, and recurring penetration testing. Whether you need a one-time assessment or an ongoing appsec consulting partnership, we align our methodology with frameworks like OWASP SAMM and NIST SSDF to help you build security into your software development lifecycle.

What industries do you serve with application security services?

We provide application security services to companies across fintech, banking, SaaS, healthcare, e-commerce, and IoT. Our clients range from startups preparing for their first security audit to established enterprises with complex multi-application environments. As an application security provider with experience across regulated and high-risk industries, we understand the compliance requirements (PCI DSS, HIPAA, SOC 2, GDPR) that shape security testing priorities.