Ranked · 1 assessed
Ordered by Agency List ScoreData-backed media planning and buying for measurable results
About this ranking
What this page ranks
This page ranks the 1 advertising agency in Cardiff, United Kingdom that has been assessed on the Agency List Score, out of 1 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, Advertising in Cardiff, United Kingdom. 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 1, so no award can be issued here.
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 advertising agencies are in Cardiff, United Kingdom?
- 1 is listed on Agency List in Cardiff, United Kingdom. 1 of them has been assessed on the Agency List Score as of October 2026.
- Which advertising agency in Cardiff, United Kingdom is ranked highest?
- Hello Starling, with an Agency List Score of 96.8, ranks #1 of 1 assessed agency in Advertising in Cardiff, United Kingdom.
- How is the ranking determined?
- By Agency List Score, within the Advertising in Cardiff, United Kingdom cohort of 1 assessed agency. 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.