Ranked · 15 of 17 assessed
Ordered by Agency List ScoreManual, automated, performance, security, and accessibility testing for web, mobile, and OTT apps
AI-driven GxP validation turning requirements into validated, audit-ready systems fast
UX design and digital strategy for startups and enterprise organizations
Development and dev services for inbound lead capture and search visibility
QA and testing services for web and mobile applications
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
Enabling digital transformation with AI and cloud solutions
Application development, cloud architecture, and testing across AWS, Azure, and GCP
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SEO and PPC services for inbound lead capture and search visibility
Inclusive software testing for accessibility and functionality
Protein analysis for pharma, academia, and industry
Custom AI software development and automation for enterprise and mid-sized organizations
Also in United States · 5 not ranked here
3 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 15 of the 17 assessed regression testing agencies in United States — the ones carrying a published score — out of 20 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, Regression 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 17, so the strongest award available here is top 25%.
The 3 regression testing agencies not yet assessed are listed on this page but not ranked.
A further 2 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 regression testing agencies are in United States?
- 20 are listed on Agency List in United States. 17 of them have been assessed on the Agency List Score as of October 2026, and 15 of those carry a published score.
- Which regression testing agency in United States is ranked highest?
- Codoid, with an Agency List Score of 96.4, ranks #1 of 17 assessed agencies in Regression Testing in United States.
- Why are 5 regression testing agencies listed here but not ranked?
- 3 of the 20 listed have not yet been assessed on the Agency List Score. A further 2 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 Regression Testing in United States cohort of 17 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.