Alphabet Has a Strange AI Problem: Success Threatens Its Biggest Money Machine

Alphabet (NASDAQ:GOOG)(NASDAQ:GOOGL) wants Google Search to do more than point people to websites. Its AI can increasingly answer questions, compare options and help complete tasks. But there’s a strange catch. Success could threaten the advertising business that pays for much of Alphabet’s AI ambitions.

WisdomTree Global Head of Research Christopher Gannatti flagged the risk in a blog post Monday on the firm’s website titled "Who Gets Paid for AI?⁠" WisdomTree increased its weighting in Alphabet to 4.2%, citing cloud growth, TPU integration and Gemini-powered enterprise agents, alongside a valuation that looks appealing relative to peers. But Gannatti identified a potential weakness in the investment thesis.

"The risk we are watching is that agentic search could disrupt advertising economics before new revenue scales," he wrote.

Agentic search means AI that handles more of the searching and decision-making process for users. Instead of scanning a list of blue links, users get synthesized answers, comparisons and help completing purchases or bookings. If fewer people navigate traditional search results pages where ads have long appeared, Google faces a challenge in making advertisements just as valuable in an AI-driven experience.

A $63 Billion Revenue Engine

The stakes are enormous. Alphabet’s Google Search and Other business generated $63.3 billion in the second quarter, representing about 53% of the company’s $119.8 billion in total revenue. The category, which includes advertising across other Google properties, grew 17% year over year in the second quarter. Across Google Services, revenue reached $94.5 billion.

By comparison, Google Cloud grew 82% to $24.8 billion. The business is expanding rapidly, but it remains far smaller than the advertising engine that has funded Alphabet’s AI push.

Google Is Betting on AI Ads

This is a potential threat, not an established collapse. Search advertising continues to grow, and Google is working to monetize its AI-powered search experiences.

AI Mode has surpassed 1 billion monthly users, while AI Overviews reach more than 2.5 billion, Google said in June. Last month, the company said ads can appear above or below AI Overviews in more than 200 markets, while ads in AI Mode remain in testing⁠.

Google is also expanding AI Max, which helps advertisers reach people making longer, more conversational searches. Its AI Max for Shopping campaigns⁠ are designed to match product ads to shoppers’ intent, including queries that traditional shopping campaigns might miss.

The company is also developing agentic shopping features that move consumers from product discovery toward checkout within AI experiences. These tools could create new advertising opportunities if Google can connect users with relevant products without making its AI answers feel like sales pitches.

Investors Face a Timing Question

WisdomTree’s decision to increase its Alphabet weighting reflects confidence in the company’s ability to finance AI investment through existing cash flows while expanding revenue through Cloud, custom silicon and enterprise AI agents. Still, the firm is watching whether advertising economics could face pressure before those newer revenue streams reach sufficient scale.

Google has argued that AI features can increase overall engagement, and longer, commercially focused queries could create valuable advertising opportunities. Retail and finance remain important categories for Search, but the economics of advertising could change as AI takes on more of the work traditionally done by users.

Google faces an unusual challenge. Its AI needs to become useful enough to change how people search, but that success could also reshape the advertising business that helped make Alphabet a technology powerhouse.

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