Late last month, the industry spent a week debating a ratio, according to Search Engine Journal. Duane Forrester reports that while marketers argue over whether Google organic or AI assistants send more visitors, data shows that the total search traffic pool is shrinking rapidly across the open web.
Key takeaways
- Marie Haynes analyzed 12 months of GA4 data across 100 sites and found ChatGPT sent a fraction of Google organic traffic.
- Similarweb analysis of 10,000 domains in the U.S. and France showed organic search visits fell significantly between August 2024 and August 2026.
- Bocconi University research found that ChatGPT produced an outbound click in only 5.2 percent of conversation sessions.
- Sundar Pichai noted on an Alphabet earnings call that agents will soon operate as a unifying layer across Google products.
What is happening to the search traffic pool?
Three pieces of research recently highlighted the small share of traffic sent by AI platforms compared to Google. Marie Haynes looked at 100 sites and more than 145 million sessions, finding that ChatGPT sent 0.62 percent of the sessions Google organic did. The SEO Works benchmarked 95 sites and found organic search delivered 39 times the traffic of AI assistants. Kevin Indig ran 632 tests across 12 sites and could not find a reliable relationship between AI visibility and later branded search or direct traffic.
However, focusing only on these channel ratios misses a larger decline. A Similarweb analysis of 10,000 domains in each of the U.S. and France showed organic search visits fell 13.2 percent in the U.S. and 24.4 percent in France between August 2024 and August 2026. Publishers lost roughly 41.5 percent of their organic traffic in the U.S. over the same two years.
How do AI referrals and clicks compare?
Paid search visits grew in the same Similarweb data, and Alphabet’s third-quarter filing showed paid clicks up 8 percent year over year. Paid growth replaced only about a third of the organic visits lost in the U.S., while AI referrals remain low, accounting for about one visit in 200. Meanwhile, a preprint from Bocconi University researchers Shi, Zhu, and Gu found that ChatGPT produced an outbound click in 5.2 percent of conversation sessions, compared to 31.1 percent of Google queries. Wider access to ChatGPT Search also reduced traditional search use by 9.4 percent.
What it means for businesses moving forward
Comparing AI referrals to Google organic only tells which inbound stream is smaller, leaving businesses blind to whether total traffic remains sustainable. With search engines and interfaces answering in place and sending fewer people anywhere, the focus must shift from chasing web visits to preparing for the agentic web. Marie Haynes encouraged readers to prepare for intelligent agents and universal carts. Sundar Pichai stated on an Alphabet Q3 earnings call that agents will operate as a unifying layer to book reservations, fill in forms, and make purchases, effectively finishing the job that website traffic used to do.
Frequently asked questions
Marie Haynes analyzed 12 months of GA4 data across 100 sites and found that ChatGPT sent 0.62 percent of the sessions that Google organic did, which rises to 0.73 percent when including every LLM.
Yes. A Similarweb analysis of 10,000 domains showed that organic search visits fell by 13.2 percent in the U.S. and 24.4 percent in France between August 2024 and August 2026.
According to a preprint from Bocconi University researchers Shi, Zhu, and Gu, ChatGPT produced an outbound click in 5.2 percent of conversation sessions, compared to 31.1 percent for Google queries.
Kevin Indig noted that paid search growth replaced only about a third of the organic visits that publishers lost in the United States over the two-year period.
Kevin Indig's follow-up data pointed to email growing about 16 percent in his U.S. sample, marking the steadiest gain of any channel because it reaches an audience a business already owns.
Based on reporting by Search Engine Journal. Read the original article
