Who says small can’t do what big can?
Buck up your ideas, mun!

This is where the little bite big.

What makes us different? We exist to help the unlikely and underestimated in their pursuit to become the overachievers they damn right deserve to be.

An independent, integrated creative agency based in the heart of Cardiff, we produce consumer-facing campaigns for those who aren’t (yet) market leaders.

This agency doesn’t ego pander and it certainly doesn’t think small, everything we do rewards ambition using S|3: strengths, skills and success.


Total Staff


Year Established


Sector Experience

Automotive, Broadcasting, Charity, Cosmetics/Beauty, Education, Financial, Food and drink, Healthcare, Leisure, Media, Outdoor Activities, Property, Public sector, Retail, Sport, Tourism, Utilities


Recommended for 36 services

and 22 more


  • Bounce Energy Balls
  • S4C
  • Deliveroo
  • National Farmers' Union (NFU) UK / Cymru
  • Kabuto Noodles
  • Iceland Food Warehouse
  • Huddersfield University
  • Spectrum Collections
  • Hosta Meltis
  • NHS | Public Health Wales


"Switchboard have worked with S3 Advertising on a couple of digital projects and it's worked out very well. They have been intuitive and responsive; contributed creative ideas and overall a pleasure to work with."

LGBT Switchboard

"S3 have driven significant growth for our business through the management of our online direct response activity. They are efficient and easy to work with making it a great all round experience."

MotoNovo Finance

"A fab diverse team, friendly, knowledgeable, speedy and great rates."

Dressing Room 5