Ranked · 6 of 7 assessed
Ordered by Agency List ScoreAI optimization and SEO for measurable digital growth
Media planning across TV, CTV, radio, podcast, and programmatic for growth-stage brands
Medical website design and digital marketing for healthcare providers and clinics
Dynamics 365 and ERP testing for manufacturing, retail, and financial services teams
Delivers measurable growth through technical SEO and tailored digital strategies
Also in California · 301 not ranked here
300 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 6 of the 7 assessed CRO agencies in California — the ones carrying a published score — out of 307 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, CRO in California. 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 7, so no award can be issued here.
The 300 CRO agencies not yet assessed are listed on this page but not ranked.
One more was assessed and no published evidence of its work was found, so no score is shown for it.
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.
Browse
Categories in California
CRO nearby
Questions
- How many CRO agencies are in California?
- 307 are listed on Agency List in California. 7 of them have been assessed on the Agency List Score as of September 2026, and 6 of those carry a published score.
- Which CRO agency in California is ranked highest?
- Avita Group, with an Agency List Score of 96.1, ranks #1 of 7 assessed agencies in CRO in California.
- Why are 301 CRO agencies listed here but not ranked?
- 300 of the 307 listed have not yet been assessed on the Agency List Score. One more was assessed and no published evidence of its work was found, so no score is shown for it. 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 CRO in California cohort of 7 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.