Warner Bros. Discovery Evaluated Ad Measurement Firms
A new white paper highlights significant data discrepancies between five major video measurement providers.
Updated on Oct. 6, 2026 in Advertising
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Warner Bros. Discovery released a white paper titled The Unified Reach Paradox that compared five video measurement providers. The report highlights massive inconsistencies in campaign metrics, with one provider reporting nearly double the impressions of another.
Why it matters
The findings underscore a lack of industry consensus on audience measurement, which hinders the ability of marketers to trust campaign performance data. WBD aims to spark a dialogue to establish clearer standards and expectations for digital and traditional video advertising.
The report analyzed 50 campaigns using five providers and surveyed 154 agency and marketer decision-makers. Data showed 73 percent of respondents identified unified reach as a missing data point, while 79 percent said they lack trust in campaign outcomes without it.
The players
Warner Bros. Discovery
This is a global media and entertainment company that owns and operates a wide portfolio of television, film, and streaming assets.
Advertiser Perceptions
This is a research firm that specializes in providing business intelligence and consumer insights to the advertising and marketing industry.
The details
WBD compared VideoAmp, iSpot, Comscore, Innovid, and Samba across areas including universal audience estimates and cross-platform coverage. Researchers specifically noted a financial brand campaign where Comscore and iSpot provided drastically different impression counts.
Timeline
Throughout 2025, WBD researched five video measurement providers.
During Q4 2025, a campaign measurement discrepancy occurred for a financial brand.
In October 2026, WBD published the white paper during Advertising Week New York.
Market Landscape
This research highlights the persistent difficulty in reconciling cross-platform data, a challenge that complicates the ongoing transition from traditional Nielsen-style ratings to multi-source digital measurement. It positions the firm as a leader in pushing for standardization amidst a fractured ecosystem of competing tech vendors.
Marketers and businesses relying on these measurement tools may find that their return on investment data varies significantly depending on the vendor they use. This lack of transparency can complicate budget allocation and make it difficult for businesses to optimize their advertising spend.
The takeaway
Advertisers should demand more transparency and standardization from measurement partners to ensure data accuracy. Relying on a single vendor's dashboard without understanding underlying methodology may lead to skewed impressions of campaign success.
Further reading
For more context on how brands manage digital reach, visit Advertising.
Source note: This article includes information reported by AdExchanger.
Live Poll
Should the advertising industry prioritize standardized measurement metrics over proprietary methodology?
