Ranked · 18 of 22 assessed
Ordered by Agency List ScoreCustom AI agents and quality engineering for software development and QA teams
Manual, automated, performance, security, and accessibility testing for web, mobile, and OTT apps
UX design and digital strategy for startups and enterprise organizations
Development and dev services for inbound lead capture and search visibility
AI-driven software testing and quality assurance for global enterprises
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AI-driven QA and testing for diverse industries
AI-powered software testing for diverse platforms and industries
AI and IP-led digital assurance across mobile, cloud, IoT, and security testing
Independent software QA testing and consulting services
Application development, cloud architecture, and managed IT support across finance, healthcare, and retail
Enabling digital transformation with AI and cloud solutions
Application development, cloud architecture, and testing across AWS, Azure, and GCP
SEO and PPC services for inbound lead capture and search visibility
Security audits, penetration testing, and managed SOC services for regulated industries
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Protein analysis for pharma, academia, and industry
Custom AI software development and automation for enterprise and mid-sized organizations
Also in United States · 8 not ranked here
4 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 18 of the 22 assessed security testing agencies in United States — the ones carrying a published score — out of 26 listed.
The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.
Cohorts and awards
Agencies are compared within a cohort — here, Security Testing in United States. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 22, so the strongest award available here is top 10%.
The 4 security testing agencies not yet assessed are listed on this page but not ranked.
A further 4 were assessed and no published evidence of their work was found, so no score is shown for them.
Paid placement
Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.
Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.
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Questions
- How many security testing agencies are in United States?
- 26 are listed on Agency List in United States. 22 of them have been assessed on the Agency List Score as of October 2026, and 18 of those carry a published score.
- Which security testing agency in United States is ranked highest?
- Abstracta, with an Agency List Score of 96.6, ranks #1 of 22 assessed agencies in Security Testing in United States.
- Why are 8 security testing agencies listed here but not ranked?
- 4 of the 26 listed have not yet been assessed on the Agency List Score. A further 4 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
- How is the ranking determined?
- By Agency List Score, within the Security Testing in United States cohort of 22 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.