DSPs reach less than 25% of the $80 billion US TV market

The over-reliance on programmatic DSPs creates a strategic bottleneck, limiting advertisers to a narrow slice of available inventory while incurring significant intermediary fees. For the streaming ecosystem, this highlights a growing divergence between the automated 'open web' model and the concentrated reality of premium TV, where 90% of scale is held by a few gatekeepers. As streaming captures nearly half of all US viewing time, the market is shifting toward 'convergent' infrastructure that bypasses traditional bidstreams. Success now depends on unified tools that can bridge the $68 billion divide between traditional upfront relationships and automated streaming auctions. Watch for publisher adoption rates of direct-connect tools like Upstream to determine if the 'ad tech tax' will face a permanent structural correction.

Tatari has built its platform around the thesis that programmatic DSPs access only a fraction of the total US TV ad market, and the company is now operationalizing that argument through a product called Upstream. Tatari announced Upstream as a supply-side technology that automates direct-sold campaigns through native integrations with publisher ad servers, including NBCUniversal, Paramount, Tubi, and Warner Bros. Discovery, in addition to Disney through its technology stack. The company reports that more than 80% of its media is transacted through direct publisher relationships, with less than 20% running programmatically, a deliberate inversion of the industry's default programmatic-first approach.

The ad-tech tax that Tatari highlights has gained mainstream validation from advertiser-side audits and industry benchmarks. The ANA's Q4 2025 Programmatic Transparency Benchmark found that advertisers enforcing quality governance converted 56.7% of programmatic spend into benchmark-qualified impressions, while lower-performing advertisers converted just 37.5%, confirming that delivery quality rather than transaction cost is now the primary constraint on programmatic performance. The same benchmark showed that private marketplaces accounted for over 92% of median spend and 100% of CTV transactions, reinforcing the shift away from open exchanges that Tatari's direct-integration model targets.

Tatari's own data and third-party research quantify the gap between programmatic reach and total TV spend. The company's 2026 guide cites Boston Consulting Group research showing publishers sell only about 35% of live-event CTV inventory programmatically, and notes that roughly one-third of every programmatic dollar goes to intermediaries rather than media. The guide also references an approximately 18% invalid-traffic rate in open programmatic CTV attributed to Pixalate, and points to Nielsen data showing streaming at 47.5% of all US TV viewing as of December 2025. These figures collectively support Tatari's argument that the $80 billion US TV market remains structurally inaccessible to DSP-only buyers.