Google: The Other Half of the DuopolyWide moat

Meta Platforms (META) — moat facet

Fifteen years of direct competition has moved search share and social share hardly at all — Google sells intent, Meta sells interruption, and advertisers buy both.

Meta and Google are described as rivals so routinely that the nature of the rivalry goes unexamined. They compete for a share of each advertiser's budget. They do not, for the most part, compete for the same advertising moment.

Why the duopoly is stableGoogle sellsintent — the user askedMeta sellsinterruption — nobody askedThe advertiserbuys both, for different jobsShare moved in 15 yearshardly any, either directionMeta price per ad, 2025+9%Competition splits a growing budget rather than driving a price war.
Fifteen years of direct rivalry has moved neither company's core share.

Google sells intent: someone has typed what they want, and the advertiser pays to be the answer. Meta sells interruption: nobody asked, and the advertiser pays for Meta's guess about who might be interested. These are complementary purchases, which is why a large advertiser buys both and why neither company has ever taken meaningful share from the other's core. Fifteen years of direct competition has moved search share and social share hardly at all.

The consequence is that the duopoly is more stable than a duopoly usually is. Each side's product is genuinely better at something the other cannot easily replicate, so competition expresses itself as a split of a growing budget rather than as price war. Meta's average price per ad rose 9% in 20251 — not the behaviour of a market under competitive assault.

Watch for the two converging on one another's ground. Google pushing harder into discovery formats, or Meta into commerce search, would be the signal that the comfortable division is breaking down. Until then, the more useful way to think about Google is as the other tollbooth on a road that keeps widening.

Moat trajectory: Holding steady

The most stable competitive relationship in this collection. Two companies have competed directly for fifteen years without either taking meaningful share of the other's core, because intent advertising and interruption advertising are different products bought by the same customer. Stable, and likely to remain so until one side pushes seriously into the other's format.

The number that tests this moat
Reported
Meta advertising revenue against Google's
$196.2B vs $294.7B in 2025

Google sells intent and Meta sells interruption, and advertisers buy both. The gap narrowing would mean budgets are moving toward discovery formats; widening, toward search and AI answers.

Source: Meta and Alphabet Forms 10-K, FY2025 ↗
References
  1. ReportedMeta's average price per ad rose 9% in 2025.
    Meta Form 10-K, FY2025 — Family daily active people 3.58 billion on average for December 2025 (+7%); ad impressions delivered across the Family of Apps increased 12% year over year in 2025; average price per ad increased 9%; total revenue $200,966M, with revenue disaggregated by customer address of United States and Canada $78,866M, Europe $46,569M, Asia-Pacific $53,817M and Rest of World $21,714M; United States revenue $74.78 billion — FY2025 (ended December 31, 2025) · publ. January 29, 2026 · source ↗
Sources
Generated September 23, 2026