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Tran Tien Van
Tran Tien Van

Posted on Originally published at vanaxity.com

The AI Marketing ROI Gap: Adoption Up, Proof Missing

Marketers adopted AI almost universally, but most can't prove it works. Here's why the AI marketing ROI gap exists and how to actually close it with measurement.

Key takeaways

  • Adoption is near-universal: Comviva's 2026 Global CMO Survey found 90% of organizations raised AI marketing investment over two years.
  • Proof isn't: only 16% of leaders feel confident defending AI spend to their board, and just 12% can rigorously isolate AI's incremental revenue impact.
  • Boards are asking: 86% of marketing leaders say they've been asked to justify AI spending at the board level.
  • A widely-cited MIT report claims 95% of enterprise genAI efforts show no measurable return, though it's a preliminary, non-peer-reviewed study that drew debate.
  • Vanaxity's recommendation: treat this as a measurement problem, isolate AI's incremental impact, consolidate fragmented costs, and report cost per outcome, not efficiency.

📖 Read the full guide on Van Data Team → The AI Marketing ROI Gap: Adoption Up, Proof Missing

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