About
We think most display ads fail for the same boring reason.
Not the bidding. The creative. BannerSphere is a display agency built around that conviction, working with brands worldwide from our base in Madrid.
Why we started
Creative and media, run as one.
Brands put real money into display every year, yet most of it rides on tired static banners and cheap, barely-seen inventory. The two halves of the channel, the creative and the buy, usually sit in different teams who barely talk. Designers hand over a few static sizes; a media team buys whatever is cheapest. No one owns the result.
We started BannerSphere in 2020 to close that gap. We run the creative and the media as a single engagement, so the banner and the buy are built for each other. That is the whole idea, and it is why one dynamic master can ship every standard IAB size at once instead of a designer resizing JPGs by hand. See it in practice in our case studies or the step-by-step process.
What we believe
Six principles we actually run by.
Not poster slogans. These decide what we build, what we buy and what we cut.
Creative first
We fix the banner before we touch the bidding, because that is where most display budgets are won or lost.
Bought for quality
Private marketplace and contextual deals, viewability floors and pre-bid fraud screening beat cheap, unseen volume every time.
Judged on conversions
Cost per acquisition and view-through, not impressions served. If a placement does not earn its place, it goes.
Your accounts, your data
We work inside your own DV360, Trade Desk and Google Ads seats. Nothing is trapped in a platform you cannot leave.
Believable over spectacular
We quote numbers inside real benchmark ranges. We would rather be trusted than dazzle you with a figure that cannot be true.
Current, not stale
Display changes fast. We re-check benchmarks and platform rules constantly, so the advice and the setup reflect how display works now.
By the numbers
What we have done so far.
display & programmatic media managed
markets we have run campaigns in
best-case retargeting ROAS delivered
largest display CPA cut delivered
The team
Two practitioners, one roof.
Creative and media, run by people who have shipped both, not by an account manager relaying messages.
Álvaro Ferrández
Creative & Performance Director
Álvaro leads BannerSphere's creative side: HTML5 banner systems, dynamic creative optimization and landing-page testing. Over ten years he has shipped thousands of responsive and dynamic display units for Spanish and EU brands, and argues that creative, not bidding, decides most display outcomes.
- Google Web Designer specialist
- Google Ads Display certified
- CXL Conversion Optimization certified
- 10 years in ad creative & CRO
Núria Bosch
Head of Programmatic
Núria plans and buys programmatic media across DV360 and The Trade Desk, with a focus on viewability, private marketplaces and contextual targeting. She has run display and retargeting for retail, travel and B2B SaaS advertisers across Spain and the wider EU for nine years.
- DV360 (Display & Video 360) certified
- The Trade Desk Edge Academy certified
- 9 years buying programmatic media
Where we work
Madrid base, clients worldwide.
We are based in Madrid and run campaigns for brands across Europe, the UK, the US and beyond, in whatever markets and languages a campaign needs. Because one dynamic creative master localises every IAB size per market, geography is rarely the constraint. Wherever your customers are, the banners and the buy travel with them.
Certified and measured on the platforms that matter
- Google Ads Display certified
- Display & Video 360 certified
- The Trade Desk Edge Academy
- Google Web Designer
- DoubleVerify & IAS verification
- GA4 measurement
See where your display budget is leaking.
Send us a campaign or a set of live banners. We will tell you, for free, what is costing you clicks and conversions, and what we would change first.