Companies Using RTB House

I've spent more than a decade building web crawlers and working with technographic data. This analysis covers 32,631 domains running RTB House as of our July 2026 crawl, of which 12,584 matched to a LinkedIn company record. That match rate of 36.9% is low next to the 57% to 66% we usually see, and working out why turned out to be the most useful thing in this dataset.

Growth trajectory

Our detection history starts in January 2014 on four domains, two years after the company was founded in Warsaw. It climbs slowly for a decade to about 2,074 active domains by April 2025. Then our own crawler reports 32,631. Those two numbers describe the same company measured two different ways, and the gap is the finding: the earlier feed never saw most RTB House deployments. Anyone reading the 2026 step as a growth explosion is reading a coverage change. For how our detection works and where it has limits, see our technology detection methods breakdown.

"The most interesting number on this page is the one that looks like growth and isn't. RTB House goes from 1,128 to 32,631 in our data without necessarily adding a single customer in between." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker

Sales Signal: Treat this as a mature market rather than an expanding one. The timing signal worth acting on isn't RTB House's growth curve, it's the 13,209 domains that dropped the tag since March 2026, and the reasons behind them.

Customer profile

The size distribution and the company list disagree, and both are correct. 54.27% of enriched customers have 1-10 employees, yet 54 of the 60 largest detections employ more than 1,000 people. RTB House sits on a barbell: a thin head of large advertisers carrying the media spend, and a long tail of small sites carrying a tag. On age, 38.99% were founded in the 2010s while 8.89% predate 1960, which is the newspaper and broadcaster cohort surfacing again.

RTB House publishes client work rather than a public customer list, so our detections are the primary evidence here. Named enterprises include LG, Magazine Luiza, Santander Brasil, Falabella and Bed Bath & Beyond. Several detections sit on subdomains with nothing to do with shopping, such as careers.neom.com and taxinvoice.airasia.com, which confirms the tag ships site-wide through a container rather than per campaign.

Sales Signal: Qualify on the head, not the distribution. The 1-10 employee majority is mostly incidental tag presence, so filter for companies above 1,000 employees in retail, banking, telecoms and travel if you're selling anything priced against ad budget.

Industry and geographic concentration

Retail leads at 6.89%. Add Newspaper Publishing (4.69%), Broadcast Media (4.64%), Book and Periodical Publishing (3.05%), Online Audio and Video (2.83%) and Media Production (2.45%) and the media cluster reaches 20.1%. That's larger than retail, and it isn't what a retargeting vendor's customer base should look like. Publishers sit on the inventory side of programmatic, so a DSP tag there is usually cookie syncing. Geographically the United States holds 41.63%, while Brazil (4.64%) and India (4.62%) both outrank Poland at 1.8%.

Sales Signal: Latin America is the concentration nobody expects from a Polish vendor. Sixteen of our 60 largest detections are Brazilian, so localised commerce, payments and measurement tooling has a warm audience in that segment.

Migration patterns

The churn direction is clear and it doesn't favour RTB House. Amazon Advertising now runs on 2,129 domains that dropped RTB House against 324 moving the other way, a 6.6:1 loss ratio. Criteo is close to balanced at 1,531 gained and 1,227 lost. Taboola shows 959 out against 253 in. Across every counterparty we recorded 2,654 gained and 5,428 lost.

One caveat outweighs all of those ratios. 81.5% of the domains that dropped RTB House had been detected exactly once, across an average of 2.67 scans, and only 493 were seen three or more times before disappearing. The same measure is 47.8% for Shopify and 62% for Tidio. A tag that intermittent is usually consent-gated or conditionally loaded, so most of these aren't cancelled contracts.

"When four in five departures are single sightings, you're measuring your own crawl as much as the market. We report the number and the caveat together, because the ratio alone would mislead." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker

Sales Signal: The Amazon Advertising corridor is the real one, and it's two-sided. Retail media budgets moving to Amazon create demand for measurement and incrementality tooling on the way in, and retention offers on the way out.

Technology ecosystem

Google Tag Manager appears on 97.32% of RTB House domains and Google Analytics on 93.16%. Adobe Experience Platform Launch reaches 38.16% and Snowplow Analytics 24.98%, both enterprise choices rather than SMB defaults. The ecommerce column is the surprise: Shopify reaches only 2.3% against 18.72% across AdRoll's base. Publisher measurement shows up too, with comScore at 6.47% and Chartbeat at 2.59%, backing the media cluster above. On consent, Funding Choices covers 21.66% and OneTrust 4.16%.

Sales Signal: Consent tooling is the gap. Roughly two thirds of these domains show no consent platform we recognise, which is both a compliance exposure for them and the reason their retargeting reach is inconsistent. Browser-level blocking compounds it, as our Safari market share analysis shows.

Third-party review signals

RTB House has almost no public review footprint. Gartner Peer Insights lists it at 5.0 stars from 2 reviews in the Ad Tech Platforms market, where Criteo carries 4.3 from 102 and Google 4.5 from 288. Gartner's comparison notes reviewers scored RTB House above Criteo on service and support and on ease of integration, and G2's side-by-side puts it ahead on ease of setup and administration. Two reviews can't carry a rating. The absence is the signal: a vendor on 32,631 domains with no review base is sold direct to enterprise, not self-serve.

Sales Signal: Buyers researching this category have almost no peer evidence to work from. Comparison content and first-party data fill a genuine vacuum here, which is unusual in adtech.

Key takeaways

1. Category rank overstates the position. RTB House is #1 of 20 in our Retargeting & Remarketing category at 68.72%, but Criteo runs 3.4x more domains from an adjacent category.
2. It's a coexistence product, not a replacement. Criteo sits on 75.83% of its domains, so advertisers stack DSPs rather than choose between them.
3. The customer base is enterprise and non-Western. Brazil, the Gulf and Southeast Asia carry the largest accounts, while Poland is 1.8%.
4. A fifth of detections are publishers. Media verticals reach 20.1%, which is supply-side cookie syncing rather than advertiser spend.
5. Churn figures need the intermittency caveat. 81.5% of departures were single sightings, so the 13,209 count measures detection volatility as much as attrition.
6. Amazon Advertising is the live threat. A 6.6:1 loss ratio is the clearest directional signal in the migration data.

Sales applications

Outreach angle: "You're running RTB House alongside Criteo, like 75.83% of the sites we track with that tag. Most teams in that position can't attribute incremental lift to either one." That opener works because it's specific and verifiable.

Targeting strategy: On TechnologyChecker.io, filter the RTB House list to 1,000+ employees, then narrow to Brazil, Chile, the UAE and Saudi Arabia. That isolates roughly the segment where our 60 largest detections concentrate, and it skips the micro-site tail entirely.

Competitive angle: The 2,129 domains that moved to Amazon Advertising are mid-transition and reviewing their retail media stack. Reach those before the migration settles, and lead with measurement rather than media buying.

All of this comes from our own crawl: 32,631 domains running RTB House, 12,584 matched to LinkedIn company records, refreshed monthly across 29.9M active domains at TechnologyChecker.io.