842 agencies indexed·Latest entry: 17 July 2026
Programmatic in Cardiff · 1 agency

Programmatic agencies in Cardiff.

Programmatic advertising is the automated, auction-based buying of digital media through demand-side platforms (DSPs) like DV360, The Trade Desk, and Amazon DSP. It spans display, online video, connected TV, digital out-of-home, and digital audio. Unlike PPC (search ads) or paid social (Meta, TikTok, LinkedIn), programmatic runs across the open web and broadcast-equivalent inventory. This page shows every agency on AgencyIndex offering programmatic in Cardiff.

At a glance
  • 1 UK agencies offering programmatic in Cardiff
  • Part of the Programmatic service set
  • Indexed in Cardiff
  • Reviewed 17 May 2026
Showing 1-1 of 1 programmatic agency in CardiffAll Programmatic agencies
Hello Starling logo
Hello Starling
Independent·Cardiff·11-50 Employees·Verified

Hello Starling is a Cardiff-based media planning and buying agency that prioritises result-driven strategies. Uniquely identified by its dedication to delivering quantifiable results for its clients, Hello Starling utilises data-led insights to customise campaigns for optimal engagement and influence. With a diversity of media specialities, encompassing TV, cinema, radio, outdoor, press, digital,

Editor's note

AgencyIndex tracks 1 programmatic agency in Cardiff. The list above is filtered to that intersection and ordered with verified and featured listings first.

For the wider editor's view on programmatic agencies in the UK, see the programmatic service brief. For context on Cardiff's marketing cluster, see the Cardiff location brief. The pricing, timeline and red-flag notes below apply to programmatic as a discipline; they do not change materially in Cardiff.

Typical cost
10-20% of spend
+ DSP fees, on £25k-500k+ monthly media

Specialist / boutique trading desk £2,000-6,000 mgmt fee + 10-20% DSP · Mid-market £4,000-15,000 + DSP fees · Network / holding-group £15,000-100,000+ on enterprise spend. Most credible agencies will not take programmatic-only briefs below ~£10k/mo media because DSP access fees stop making sense.

Realistic timeline
4-8 weeks
onboarding, then always-on

1-2wks DSP seat + billing + pixel and conversion setup · 1-2wks audience build, first-party data onboarding, creative trafficking (VAST for CTV) · 2-4wks CTV QA, brand-safety and SPO config, test campaigns. CTV and clean-room data flows push the upper bound.

Red flags
6 to watch
in any pitch
  • · Bundled 'all-in CPM' with no separated agency fee, DSP fee, data fee, and SSP cost breakdown
  • · No supply path optimisation (SPO) strategy and no explicit Made-for-Advertising (MFA) exclusion list
  • · No third-party verification via DoubleVerify, IAS, or MOAT (or sell-side-only reporting)
  • · Refuses log-level data access or independent audit rights in the contract
  • · Won't disclose rebates, principal-trading arrangements, or preferred-supplier incentives
  • · Treats programmatic as 'retargeting + display network' rather than a CTV / DOOH / audio / open-web stack
Frequently asked

What brands ask about programmatic agencies.

The 5 questions our editors get most often, answered honestly. These apply to programmatic as a discipline regardless of city.

Curated by humans

UK programmatic engagements in 2026 layer two costs. Agency management runs £2,000-6,000 a month for specialist trading desks, £4,000-15,000 at mid-market, and £15,000-100,000+ at network or holding-group level. On top sits the DSP access fee, typically 10-20% of media spend on The Trade Desk and 10-15% on DV360. Most credible agencies set a minimum media commitment around £10,000 a month because below that, platform fees swallow efficiency.