As cyber threats become more tricky and sophisticated, ensuring robust application security is critical for the success and reputation of businesses of all sizes.
Top application security companies apply proven tools and best practices to help clients identify vulnerabilities, protect against attacks, and maintain compliance. With a wide range of solutions available, selecting the right partner can be challenging.
In this article, we feature the best app security companies and experts boasting years of expertise and multiple notable achievements in the field of cyber security.
Application Security Companies At A Glance
Here is a quick comparison of the application security companies in this list, with the headquarters and core AppSec services stated in each profile below.
1. Company
HQ
AppSec services
1. White Knight Labs
Pennsylvania, USA
Mobile and web application testing, cloud penetration testing
2. Offensive Security
New York, USA
Penetration testing, offensive security training (OSCP, OSWP, OSCE)
Since 2017, White Knight Labs has been providing a comprehensive range of cybersecurity solutions, spanning mobile application testing, web application testing, cloud penetration testing, network penetration testing, physical penetration testing, and more.
The company is a leader in web app penetration testing, specializing in identifying vulnerabilities across a broad array of programming languages and environments. From crypto trading platforms to complex web apps handling HIPAA data, security experts at White Knight Labs help effectively safeguard sensitive data in every sector. They boast a proven track record of testing hundreds of web applications across America’s critical infrastructure, providing meaningful insights and solutions to protect strategic systems.
White Knight Labs also offers premium-quality mobile application penetration testing services. Experienced security engineers at this company have unmatched expertise in both iOS and Android platforms, ensuring meticulous testing of on-device security issues, back-end web services, and APIs.
Services and expertise: mobile application testing, web application testing, cloud penetration testing, network penetration testing, physical penetration testing
Location: Pennsylvania, USA
Team size: 10+ experts
Industries: Financial Services, Government, Manufacturing, Information Technology, Healthcare, Media, Retail
Clients: Harbor Financial Group LLC, USPlate Glass Insurance Company, Frost Ridge Maple Farm
Offensive Security (OffSec) is a well-known provider of cybersecurity training and certifications, with a focus on ethical hacking and penetration testing. They are recognized for their hands-on approach to security education, offering courses like the Offensive Security Certified Professional (OSCP) and other certifications tailored to security professionals.
OffSec’s training programs are designed to help individuals and organizations enhance their application security skills through practical exercises and real-world scenarios. In addition to training, OffSec offers penetration testing services aimed at uncovering vulnerabilities in applications and networks. Their security assessments focus on identifying risks and weaknesses, allowing companies to fortify their defenses against potential attacks.
By combining education with testing, OffSec supports businesses in building a stronger security posture, especially in the realm of offensive security tactics.
Services and expertise: offensive security certified professional (OSCP) training, offensive security wireless professional (OSWP) training, offensive security certified expert (OSCE) training, advanced web attacks and exploitation (AWAE), offensive security exploitation expert (OSEE) training, penetration testing services
Checkmarx is among the best application security services, providing a platform designed to help organizations secure their software development lifecycle. Their exclusive platform scans over 160 billion lines of code monthly, identifying vulnerabilities and ensuring that security is integrated into development processes.
With over 1.05 million customer scans conducted each month, 80% of which utilize multi-engine scanning, Checkmarx ensures thorough coverage across various coding environments. Their support spans 75+ technologies and programming languages, making their solution adaptable for a wide range of software applications across industries.
Serving over 1,800 customers in 70+ countries, Checkmarx leverages AI across its platform to streamline security management, enhance accuracy, and reduce the total cost of ownership (TCO). By incorporating AI-driven capabilities, they make application security more accessible to developers, encouraging them to adopt a security-first mindset throughout the development cycle. This approach aligns with their goal of simplifying complex security measures and integrating them more seamlessly into daily software development practices.
Services and expertise: SAST, SCA, AI security, API security, ASPM, codebashing, container security, maturity assessment
Location: headquarters in Israel; offices in 8 locations
Veracode is a well-known application security company that focuses on providing solutions for secure software development. Their platform has scanned over 164 trillion lines of code, enabling organizations to detect and remediate security vulnerabilities throughout the software development lifecycle.
By offering static and dynamic analysis, software composition analysis, and manual penetration testing, Veracode supports a range of approaches to identify software flaws early and address them effectively. The company has helped fix over 89 million software vulnerabilities, demonstrating its impact in reducing security risks for organizations. With a customer recommendation rate of 97%, Veracode is widely used across industries to improve application security and promote secure coding practices.
Their approach emphasizes integrating security into development processes, helping developers and security teams work together to build more resilient software.
Contrast Security is one of the best app security audit companies that specialize in application security by embedding security testing directly into the software development process. Their platform helps enterprises reduce vulnerabilities in applications, boasting a 92% reduction in vulnerable apps.
By integrating security early in the development cycle, Contrast Security enables continuous detection and remediation of threats, which minimizes security risks before applications are deployed. The company’s approach aligns with the shift toward DevSecOps, ensuring that security becomes an inherent part of the development process.
The company reports a 258% three-year return on investment (ROI), with a total cost of ownership reduction and a payback period of just five months. Additionally, Contrast Security increases developer productivity by 13%, freeing up five hours per week per developer by streamlining security checks. This efficiency allows developers to focus more on coding rather than spending excessive time on security fixes, improving overall workflow without compromising security standards.
Rapid7 is a top app cybersecurity service company that offers a range of application security solutions to help organizations identify and manage vulnerabilities within their software environments. Their platform integrates security testing into the software development process, focusing on vulnerability management, application security, and penetration testing.
With their InsightAppSec solution, Rapid7 helps developers scan applications for security issues throughout the development lifecycle, allowing for real-time detection and remediation of vulnerabilities. The company’s approach to application security emphasizes automation and scalability, allowing organizations to manage security risks across large application portfolios.
Rapid7 provides tools that enable continuous monitoring of applications to detect vulnerabilities and misconfigurations before they can be exploited. They’re designed to support DevSecOps practices, aligning security testing with development cycles to enhance security without interrupting the development process.
Services and expertise: dynamic analysis, mobile application security testing (MAST), API security testing
Astra Security focuses on providing comprehensive mobile application security solutions. Their platform allows organizations to test Android and iOS applications for over 9,300 different vulnerabilities and hacks.
Astra combines dynamic application security testing (DAST), static application security testing (SAST), and manual scanning to ensure thorough security assessments. Through their pentesting services, they provide continuous protection by identifying and addressing potential vulnerabilities before they can be exploited.
The platform reports uncovering over 110,000 vulnerabilities monthly, helping businesses save valuable time by preventing security breaches. It’s designed to streamline the security process for developers and CXOs, allowing them to maintain secure mobile applications with reduced manual effort.
Additionally, Astra provides application audit services and penetration testing checklist, allowing organizations to evaluate and enhance their mobile app security posture effectively.
Services and expertise: mobile app security, web application security, DAST, SAST, manual scanning, vulnerability assessment, penetration testing
Palo Alto Networks is a global cybersecurity company that offers advanced solutions for application security, with a focus on protecting cloud environments, preventing malware attacks, and blocking exploit attempts. Their platform processes over 1 trillion cloud events, detecting more than 3,000 exploit attempts and preventing 250,000 malware executions. By analyzing vast amounts of data and identifying new attack vectors, Palo Alto Networks aims to provide real-time security insights to safeguard applications and infrastructure.
The company has analyzed 1.57 billion unique objects and identified 16.94 million new unique attack objects, which helps organizations stay ahead of emerging threats. In total, they have prevented 11.3 billion attacks inline, ensuring that application vulnerabilities are addressed proactively.
Palo Alto Networks’ approach emphasizes continuous monitoring and threat detection to protect cloud-native applications, aligning with modern security needs for enterprises operating in dynamic digital environments.
HCL Software is a division of HCL Technologies, focusing on providing a range of software solutions across various domains, including application security. The company offers products designed to help organizations secure their applications against vulnerabilities and threats, emphasizing both automation and compliance. With tools that integrate security practices into the development lifecycle, HCL Software aims to address the increasing demands for robust application security measures in a rapidly evolving digital landscape.
In addition to standard application security offerings, HCL Software provides advanced features such as continuous security testing, threat modeling, and vulnerability management. These capabilities enable organizations to identify potential security weaknesses early in the software development process, thus reducing risk and enhancing overall application resilience.
HCL Software’s approach aligns with industry trends that advocate for a DevSecOps framework, enabling development teams to incorporate security considerations seamlessly without hindering the pace of software delivery.
Services and expertise: digital transformation, enterprise security, data & analytics, AI, automation, cloud-native software, marketing automation, customer data platforms, application security, low-code app development
Location: New Jersey, USA
Team size: 20,000+ experts
Industries: Manufacturing, Banking, Financial Services, Healthcare, Retail, and Technology
Invicti is a top provider of web application security solutions, specializing in dynamic application security testing (DAST) and interactive application security testing (IAST). Their flagship product, Acunetix, is designed to identify vulnerabilities in web applications, such as SQL injections and cross-site scripting, using automated scanning technology. Invicti’s tools are aimed at enabling organizations to continuously monitor and secure their web applications throughout the development lifecycle.
In addition to scanning, Invicti offers features that integrate directly with development environments, allowing teams to quickly address vulnerabilities without disrupting workflows. Their platform supports a wide range of web technologies and is built for scalability, making it suitable for large enterprises.
By combining DAST and IAST capabilities, Invicti helps organizations enhance their application security posture and reduce the risk of potential breaches.
Services and expertise: DAST IAST, vulnerability scanning, and web application security
Location: Texas, USA
Team size: 300+ experts
Industries: Finance, Healthcare, Government, and Technology
NowSecure specializes in mobile application security, providing automated mobile security assessments and expert penetration testing. With over 12 years in the industry, the company focuses on helping organizations identify and remediate security vulnerabilities in mobile applications.
Their automated solutions deliver over 4,000 mobile assessments daily, helping to detect a wide array of security risks. This process allows businesses to continuously monitor and improve the security of their mobile apps with minimal manual intervention.
In addition to automated assessments, NowSecure offers expert mobile penetration testing services. Their team conducts over 11,000 mobile penetration tests, complementing their automated solutions with a human-led approach for deeper vulnerability detection. With their tools uncovering more than 20,000 vulnerabilities daily, NowSecure emphasizes comprehensive coverage to secure mobile applications at scale.
Services and expertise: mobile digital transformation, mobile DevSecOps, OWASP mobile AppSec testing, mobile app security testing, API security testing
Location: Chicago, USA
Team size: 150+ experts
Industries: Consumer, Retail, Hospitality, Financial Services, Government, High Tech, Telecommunications
Clients: Cohesion, Yellow Card, U.S. Department of Justice, Genisys
TechMagic is a software development company with a strong security focus, providing comprehensive cybersecurity services. The team is dedicated to assessing and fortifying web and mobile applications, cloud and network environments.
As part of their offerings, they provide application security as a service, integrating security into every stage of the software development lifecycle to proactively identify and remediate vulnerabilities. The company’s expertise extends to managed security services, virtual CISO services, penetration testing, and audits preparation. Techmagic provides reasonable and reliable solutions without inflating clients’ budgets.
TechMagic is ISO 27001 certified and holds CREST accreditation for their penetration testing, ensuring top-tier information security and technical rigor. They are recognized by Clutch as one of the best cybersecurity companies, helping organizations to enhance their overall security posture.
Areas of Expertise: Cloud security, mobile and web applications, and network security.
Services and expertise: Managed security services (SOC), Penetration testing, Security awareness training, Virtual CISO services, ISO 27001, SOC2 and HIPAA consulting and readiness services, DevSecOps, Сyber Threat Intelligence.
Ox Security is a leading application security provider delivering a unified Active ASPM platform that enables organizations to focus on the 5 % of vulnerabilities that truly matter. By modeling exploitability, reachability, and business impact across the software delivery lifecycle, Ox ensures that critical risks are addressed before they reach production.
Analyzing over 100 million lines of code daily for around 200 customers, Ox helps security and DevOps teams eliminate noise from generic prioritization and focus remediation on high-impact issues only.
With support from major investors—DTCP led its $60 million Series B funding round, with participation from IBM Ventures, Microsoft, Swisscom Ventures, Evolution Equity Partners, and Team8—Ox continues scaling its platform, now serving customers ranging from Fortune 10 enterprises to government agencies.
Ox’s platform offers AI-powered fix recommendations, seamless CI/CD integration, and over 100 integrations across open-source and security tools, delivering end-to-end visibility and streamlined remediation workflows.
Services and expertise: Active ASPM, software supply chain security, AI-driven remediation, API exposure management, compliance, developer empowerment
Location: New York & Tel Aviv
Team & scale: ~150 employees
Industries & clients: eToro, SoFi, Microsoft, IBM
Application Security Services Explained
Application security (AppSec) covers the tools and services that find and fix weaknesses in software before attackers can use them. Most providers combine several of the following:
Static application security testing (SAST): scans source code for vulnerabilities without running the application, so developers can fix issues early in the build.
Dynamic application security testing (DAST): tests a running application from the outside, the way an attacker would, to find issues such as injection flaws and misconfigurations.
Interactive application security testing (IAST): places sensors inside a running application to combine code-level detail with runtime testing.
Software composition analysis (SCA): checks open source libraries and dependencies for known vulnerabilities and license risks.
Runtime application self-protection (RASP): monitors an application in production and blocks attacks as they happen.
Penetration testing: security specialists manually attack web, mobile, API and cloud targets to find flaws that automated tools miss.
API and mobile app security testing: focused testing for the interfaces and mobile apps that now carry much of a business’s sensitive data.
Application security posture management (ASPM): brings findings from different tools together so teams can prioritize and track fixes across the software supply chain.
Some companies in this list are product vendors that sell testing platforms, while others are service firms that run assessments for you. Many larger teams use both.
How To Choose An Application Security Company
Start with what you need to protect. Web apps, mobile apps, APIs and cloud workloads call for different testing skills, so check that a provider covers your mix.
Decide between tools and services. A platform suits teams that want continuous scanning inside their pipeline; a service firm suits teams that need expert manual testing or lack in-house security staff.
Check how findings reach developers. Look for integrations with your code repositories, CI/CD pipeline and issue tracker, plus clear remediation guidance.
Ask about false positives. A tool that floods developers with noise gets ignored. Ask how results are verified and prioritized.
Look at compliance experience. If you work under standards such as PCI DSS, HIPAA, SOC 2 or ISO 27001, ask for relevant reports and past projects.
Review credentials and references. Tester certifications, case studies in your industry and client references show how a firm performs in practice.
Application security services usually include code scanning (SAST), testing of running applications (DAST and IAST), open source dependency checks (SCA) and manual penetration testing of web, mobile and API targets. Many providers also offer remediation guidance, developer training and help with compliance. Some add runtime protection and posture management to track risk across all applications.
How much does application security testing cost?
Cost depends on the scope and the delivery model. Testing platforms are usually sold as subscriptions priced by the number of applications, developers or scans, while penetration tests are typically quoted per engagement based on the size and complexity of the application. Retesting, compliance reporting and ongoing managed services add to the total, so ask for a scoped quote.
SAST vs DAST: what is the difference?
SAST analyzes source code from the inside without running the application, which helps developers catch flaws early. DAST tests the running application from the outside, the way an attacker would, which finds runtime and configuration issues that code scanning can miss. Most mature AppSec programs use both, often alongside IAST and SCA.
In an increasingly digital world, application security is essential to safeguard sensitive data and prevent cyberattacks. The companies highlighted in this article offer a variety of automated and manual solutions to help businesses strengthen their security posture.
By addressing vulnerabilities and staying ahead of emerging threats, these providers play a crucial role in protecting applications. With the right application security partner by your side, you can confidently secure your software and data.
If you want to feature your app security company on this list, email us or submit a form in the Top Choices section. After a thorough assessment, we’ll decide whether it’s a valuable addition.
