Competitive strategy / Jul 18, 2026 / 4 min
Reddit Built the List. Idealo Closed the Sale.
On July 17, France's competition authority published a 3,700-page opinion finding OpenAI, Google, and Anthropic control 84% of the global AI agent market — then proved with 550 shopping prompts that ChatGPT and Gemini shop entirely different internets.
France's antitrust watchdog didn't just count market share — it built shopping bots, ran 550 purchase prompts through ChatGPT and Gemini, and proved the next checkout layer is already a three-company cartel where the sites agents visit and the sites they cite are not the same thing.
What's new: On July 17, the Autorité de la concurrence published Opinion No. 26-A-05 — more than 3,700 pages with annexes — concluding OpenAI, Google, and Anthropic together hold more than 84% of the global AI agent market, citing Sensor Tower data from May 2026.
The opinion does not accuse anyone of breaking the law. It maps how chatbots became autonomous agents — and how those agents are becoming the new gatekeepers to digital commerce.
The experiment: Between May 20 and 30, regulators posed 550 shopping questions to ChatGPT and Gemini via their APIs: 350 discoverability prompts and 200 purchase-completion follow-ups across electronics, appliances, hotels, and transport.
They logged every site each agent visited and every source it cited. The results diverged sharply:
- ChatGPT consulted Reddit on 87.4% of discoverability questions — but cited Reddit in only 1.0% of answers. Wikipedia followed a similar pattern: consulted 32.0%, cited 3.5%.
- Gemini leaned on Idealo (87.0%) and Cdiscount (62.5%) to complete purchases — price-comparison and retail sites ChatGPT barely touched.
- Across both agents, the 10 most-visited sites accounted for 24% of visits but only 22% of ChatGPT citations and 20% of Gemini's — meaning the browsing trail and the footnotes don't match.
The Authority cautions the snapshot isn't statistically definitive. It's still the first time a major regulator stress-tested agentic commerce with its own bots.
Why three firms own the funnel: Building an agent is cheap. Scaling one is not.
- Distribution: Copilot ships inside Office. Gemini ships inside Android. Meta AI ships inside WhatsApp. Rivals without a default install pay to reach users.
- Data: Incumbents combine proprietary usage logs with search-engine ranking power competitors cannot replicate.
- Inference costs: An EY study cited in the opinion estimates orchestrating a multi-step agent task cost $1.20 in 2026, up from $0.04 for a single chat response in 2023. Google told markets in May it processed 3.2 quadrillion tokens per month — seven times the prior year.
In France, ChatGPT reached 21.6 million unique visitors in September 2025, per Médiamétrie. OpenAI reported 900 million weekly active users and 50 million subscribers worldwide as of March 2026.
Mistral AI is named repeatedly as Europe's lone scaled alternative — and one respondent told the Authority it "does not benefit from the same investment capacity, infrastructure and large-scale adoption as the global US players."
The commerce protocols race: Agentic checkout is not theoretical. Two incompatible standards are already competing:
- Google's Universal Commerce Protocol (UCP), launched January 2026 with Shopify, Walmart, Visa, and Stripe.
- OpenAI's Agentic Commerce Protocol (ACP), launched September 2025 with Stripe under Apache 2.0.
The Authority warns whoever governs those standards controls a chokepoint — Recommendation No. 6 calls for open, collaborative standard-setting so no dominant player writes the rules alone.
That fight is accelerating: the Linux Foundation launched the x402 Foundation on July 14 with Visa, Mastercard, Coinbase, and Stripe to standardize machine-to-machine payments over HTTP — a separate rail from either checkout protocol.
The traffic cliff ahead: AI-agent referrals to French e-commerce sites sit below 5% today. The Authority forecasts 20% to 25% by 2030.
When purchases happen inside an agent interface, merchants lose behavioral data, publishers lose referral revenue, and users may never see the websites that supplied the underlying information. The opinion frames this as "disintermediation" — and flags risks of self-preferencing, bundling, and algorithmic collusion as agents gain negotiating power.
European Commission Executive Vice-President Teresa Ribera's warning on the Meta-WhatsApp case — that "in rapidly evolving markets, competition can be lost long before a final decision is adopted" — appears in the opinion as a cautionary precedent.
What Paris wants: Six recommendations, no fines — yet.
- Fully deploy existing EU law: the AI Act, DMA, DSA, GDPR, and Data Act.
- Watch equity investments and partnership deals between big platforms and agent developers.
- Guarantee users can switch agents without losing history or functionality.
- Keep standards open as agentic commerce scales.
Convina's view: SEO optimized your brand for Google. Agentic commerce will route around it. The Authority's 550-prompt experiment shows there is no single "agent internet" — ChatGPT shops Reddit, Gemini shops Idealo, and three California companies own 84% of the front door. Enterprise buyers betting on one checkout protocol or one agent API are picking a landlord, not a market. Build for portability, audit citation trails, and assume the cart layer consolidates faster than the model layer did.