Qualys

Qualys

Cloud-based IT security and compliance platform with web application scanning (WAS) for automated DAST and API security testing.

About Qualys

Qualys, Inc. is a pioneering leader in cloud-based security, compliance, and IT solutions, serving over 10,000 subscription customers globally, including many from the Forbes Global 100 and Fortune 100. Established in 1999, Qualys offers a unified platform that automates security and compliance processes, delivering critical security intelligence through a single agent. Their solutions enable organizations to streamline vulnerability detection, compliance management, and protection across a range of IT environments, including on-premises systems, endpoints, servers, and various cloud platforms. With strong partnerships with major cloud service providers like Amazon Web Services, Google Cloud, and Microsoft Azure, Qualys integrates its expertise into a variety of security offerings. The company's mission is to help businesses effectively measure and eliminate cyber threats through innovative detection and remediation tools.

Editorial Review

Our take on Qualys

Qualys is a well-established player in the application security testing space, headquartered in Foster City, CA. Founded in 1999, the company has built an enterprise-scale organization with global reach that serves a diverse range of clients across multiple industries including financial services, healthcare, technology, and government sectors.

Their core service offerings span DAST, Web Application Scanning, Vulnerability Management, Compliance, among other specialized capabilities. Qualys has positioned itself as a reliable partner for organizations seeking to identify and remediate vulnerabilities in their software applications before they can be exploited by malicious actors. The company's approach emphasizes both automated scanning technologies and expert-driven assessment methodologies.

One of the notable strengths of Qualys is its commitment to staying current with evolving threat landscapes and emerging attack vectors. Their security professionals bring deep technical expertise and industry certifications that add credibility to their assessments. Clients frequently cite the quality of reporting and actionable remediation guidance as key differentiators.

From a service delivery standpoint, Qualys demonstrates professionalism in project management, clear communication throughout engagements, and thorough documentation of findings. Their solutions are designed to integrate into modern development workflows, supporting organizations in their shift-left security initiatives and DevSecOps transformations.

For organizations evaluating application security testing providers, Qualys represents a solid option worth considering. Their combination of technical capabilities, industry experience, and commitment to client success makes them a competitive choice in the Foster City market and beyond. Prospective clients should evaluate specific service offerings against their unique requirements to ensure the best fit for their security program needs.

Badges & Credentials

Verified credentials and recognition earned by Qualys

5 badges

Verification

Verified

This agency has a verified website presence.

LinkedIn Verified

This agency has a verified LinkedIn company page.

Recognition

Top Rated

This agency has an exceptional AgencyCluster score of 80+.

Experience

15+ Years

Established in 1999. Over 15 years of experience.

Company

Enterprise

Enterprise (500+)

Awards & Recognition

Rankings earned on AgencyCluster

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About Qualys

Common questions about Qualys.

Where does Qualys rank on AgencyCluster?

Qualys has earned rankings on 5 AgencyCluster lists: Top 25 Application Security Testing in California, Top 10 Application Security Testing in California, Top 50 Application Security Testing, and 2 more. Their highest AgencyCluster Score is 97/100. Rankings are merit-based and determined by evidence across six evaluation pillars — agencies cannot pay for higher positions.

What are Qualys's strengths according to AgencyCluster?

In our evaluation for Application Security Testing, Qualys scores 97/100 overall. Their strongest areas are Credibility, Proof of Work & Outcomes, Reputation, Delivery Maturity, Freshness, Category Fit. A high Outcomes score means they have verifiable case studies with measurable results — the most heavily weighted factor in our methodology.

How long has Qualys been in business?

Qualys was founded in 1999, giving them over two decades of experience in application security testing. In an industry where many agencies are less than 5 years old, 27+ years of sustained operations signals stability, client retention, and the ability to adapt through multiple technology cycles. Today, the team is enterprise.

Is Qualys a verified agency?

Yes. Qualys has been vetted and verified by AgencyCluster's editorial team through a rigorous, multi-factor review process. Unlike self-serve directories, AgencyCluster does not accept automated submissions — every agency is evaluated manually before being published. Our vetting covers identity verification (website, LinkedIn, domain age), business legitimacy (years of operation, team size, registered presence), evidence of work (case studies, portfolio, client outcomes), reputation checks across third-party platforms, activeness and freshness of their online presence, and screening for red flags including misconduct, fraud, or misleading claims. Agencies that fail any critical check are not listed. For Qualys, verified signals include a functioning website, LinkedIn company profile, 27+ years of operating history (founded 1999), 5 earned rankings on curated top lists.