Ads

The Duopoly

Google and Meta — half the world’s digital ad spend between them

GOOGL — Alphabet (Google)

Search, YouTube, and the ad-tech stack that brokers a huge share of the open web — the single biggest digital ad business on earth, now bolted to Gemini.

Why it matters: The gravity well of digital advertising — every challenger on this map is measured by how much share they can pry loose from Google.

Outlook: Search ads still print cash while YouTube and Cloud grow; the swing factor is whether AI search answers erode the query volume the whole model rests on.

Check the data: Yahoo Finance quote & financials · Find SEC filings

META — Meta

Facebook, Instagram, WhatsApp, and Threads — the social half of the duopoly, where AI-driven targeting and Reels monetization keep ad revenue compounding.

Why it matters: The other half of the duopoly and the templater of the playbook everyone copies — short-form video, AI targeting, and a self-serve auction.

Outlook: The best-performing ad machine of the cycle: AI recommendations lifted engagement and price-per-ad simultaneously, funding the Reality Labs money pit.

Check the data: Yahoo Finance quote & financials · Find SEC filings

The Challengers

Retail media, streaming, and social chipping at the duopoly

AMZN — Amazon

Retail media’s 800-pound gorilla: ads on the product searches where people actually buy. The fastest-growing threat to the duopoly because it owns the purchase intent.

Check the data: Yahoo Finance quote & financials · Find SEC filings

TIKTOK — TikTok (private)

The attention black hole that forced Meta and YouTube to copy it. A private (ByteDance-owned) juggernaut whose US ad business grows despite constant divestment drama.

Why it matters: The reason Reels and Shorts exist. Its US ownership saga is a live catalyst — a forced sale would reshuffle billions in ad dollars.

valuation $300B · revenue $30B

NFLX — Netflix

The streaming winner’s ad tier is now a real ad business — premium connected-TV inventory sold against the most-watched content on the platform.

Check the data: Yahoo Finance quote & financials · Find SEC filings

DIS — Disney

Disney+, Hulu, and ESPN streaming — premium CTV ad inventory bundled with sports and franchises the duopoly can’t match.

Check the data: Yahoo Finance quote & financials · Find SEC filings

RDDT — Reddit

The internet’s comment section, monetizing intent-rich conversation — and licensing its data to the AI labs training on it.

Check the data: Yahoo Finance quote & financials · Find SEC filings

PINS — Pinterest

Visual discovery with commercial intent baked in — a shopping-adjacent ad platform that punches above its size in retail categories.

Check the data: Yahoo Finance quote & financials · Find SEC filings

SNAP — Snap

Snapchat’s AR-forward ad platform — a perennial turnaround story chasing profitable growth against far larger rivals.

Check the data: Yahoo Finance quote & financials · Find SEC filings

The Independents

The neutral plumbing and performance engines

TTD — The Trade Desk

The largest independent demand-side platform — the neutral buying desk for the open internet and connected TV, positioned as the alternative to the walled gardens.

Why it matters: The purest public pick-and-shovel on digital advertising — it wins when ad budgets flow to the open web instead of the walled gardens.

Outlook: CTV is the growth engine; the bet is that advertisers want a Switzerland outside Google and Amazon, though both are muscling into the same ad-tech turf. Demoted from the S&P 500 to the MidCap 400 in the September 2026 rebalance (effective Sept 21) — forced index selling after a rough year.

Check the data: Yahoo Finance quote & financials · Find SEC filings

APP — AppLovin

The mobile-gaming ad engine (AXON AI) that became one of the market’s biggest winners — now pushing its performance-advertising model into e-commerce.

Why it matters: The AI-performance dark horse: if its e-commerce ad expansion works, it attacks the duopoly from the results-driven bottom.

Check the data: Yahoo Finance quote & financials · Find SEC filings

The Budget

One pool of money everyone is fighting over

Advertisers

Brands and performance marketers with a finite budget — every dollar TikTok or Amazon wins is a dollar Google or Meta loses. This is the share-of-wallet everyone here is fighting over.

Relationships on the map

• Alphabet (Google) supplies Advertisers — Search & YouTube ads (~$280B/yr)
  Search, YouTube, and network ads — the largest single slice of the global ad budget.
• Meta supplies Advertisers — Social & Reels ads (~$175B/yr)
  Feed, Stories, and Reels across Facebook and Instagram — the social half of the duopoly.
• Amazon supplies Advertisers — Retail media (~$60B/yr)
  Sponsored products on the searches where people actually buy — retail media’s biggest engine.
• TikTok supplies Advertisers — Short-video ads (~$30B/yr)
  The fastest-growing attention platform, monetizing short video worldwide.
• Netflix supplies Advertisers — CTV ad tier (~$4B/yr)
  Premium connected-TV inventory — small today, growing fast.
• Disney supplies Advertisers — CTV & sports ads (~$6B/yr)
  Hulu, Disney+, and ESPN streaming inventory.
• Reddit supplies Advertisers — Conversation ads (~$2B/yr)
  Intent-rich ads plus AI data licensing.
• Pinterest supplies Advertisers — Discovery ads (~$4B/yr)
  Shopping-adjacent visual ads.
• Snap supplies Advertisers — Social & AR ads (~$5B/yr)
  Snapchat’s ad platform.
• The Trade Desk supplies Advertisers — Open-web & CTV buying (~$3B/yr)
  The independent demand-side platform for the open internet.
• AppLovin supplies Advertisers — Performance ads (~$5B/yr)
  AI-driven mobile and e-commerce performance advertising.
• Alphabet (Google) competes with Meta — The duopoly
  The two giants split roughly half of global digital ad spend and set the price for everyone else.
• TikTok competes with Meta — Short video
  TikTok forced Meta to build Reels; they fight for the same young attention and creator economy.
• TikTok competes with Alphabet (Google) — Video attention
  TikTok and YouTube Shorts battle for short-form video minutes and creators.
• Amazon competes with Alphabet (Google) — Search intent
  Product searches are moving to Amazon — the most valuable queries Google is losing.
• Netflix competes with Disney — CTV inventory
  The two premium streamers race to build ad tiers against the same CTV budgets.
• The Trade Desk competes with Amazon — Independent vs walled garden
  The Trade Desk pitches neutrality while Amazon and Google pull ad-tech into their own gardens.
• AppLovin competes with Meta — Performance ads
  AppLovin’s AXON engine competes with Meta’s Advantage+ for results-driven ad budgets.
• Reddit partners with Alphabet (Google) — AI data licensing (~$60M/yr)
  A $60M-a-year deal (Feb 2024) to train Gemini on Reddit posts — up for renewal in 2026, with Reddit threatening to walk as AI Overviews eat the search referrals it depends on.