AI Search Traffic Index.

ChatGPT currently sends the most referral traffic to websites, accounting for roughly two-thirds of all AI-sourced visits. However, Claude, Gemini, and Perplexity are growing rapidly and collectively represent a significant and increasing share of AI referral traffic.

ChatGPT is the largest source of AI referral traffic, driving approximately 60-70% of all AI search visits to websites. The exact volume varies by industry and website category, but across our panel of 2,600+ GA4 properties, ChatGPT consistently dominates. Visit our ChatGPT Traffic Index for a detailed breakdown.

Yes. Aggregated across all major AI platforms, referral traffic to websites from AI search engines has grown significantly year-over-year. While individual platforms fluctuate week to week, the overall trend is clearly upward as more users adopt AI-powered search.

AI search currently accounts for a small but rapidly growing share of total website traffic - typically between 0.5% and 3% for most sites, though some technology and e-commerce sites see up to 5-8%. The percentage is growing month over month as AI search adoption accelerates.

Traffic is measured through Google Analytics 4 (GA4) by filtering sessions where the traffic source matches known AI platform domains - including chatgpt.com, claude.ai, gemini.google.com, perplexity.ai, and others. The index aggregates this data from 2,600+ anonymized GA4 properties across multiple industries.

Market share represents each AI platform's percentage of total AI referral traffic (sessions) across all tracked properties over the most recent 30-day period. It shows relative distribution, not absolute volume.

Newer AI search platforms are growing from a smaller base, so percentage growth appears larger. ChatGPT's growth rate is naturally slowing as it matures, but its absolute volume remains dominant. The diversification of AI search traffic mirrors the broader trend of users trying multiple AI tools.

Technology, e-commerce, and finance sectors typically see the highest AI referral traffic volumes. SaaS companies and B2B technology brands tend to receive more AI search visits because their products are frequently researched through AI assistants. The industry breakdown section above shows current 30-day trends across all tracked verticals.

AI search traffic is still a fraction of Google organic traffic for most websites, but it is growing much faster. Unlike Google where you compete for 10 blue links, AI search engines typically recommend only 3-5 brands per query, making each mention significantly more valuable. Early data suggests AI referral visitors also have higher engagement rates.

In GA4, go to Reports > Acquisition > Traffic Acquisition and filter by source. Look for traffic from chatgpt.com, claude.ai, perplexity.ai, gemini.google.com, and copilot.microsoft.com. For automated tracking with benchmarks, connect your GA4 property to Trakkr to get per-source breakdowns and industry comparisons.

The AI Search Traffic Index is a free, daily-updated benchmark that tracks how much referral traffic AI search engines (ChatGPT, Claude, Gemini, Perplexity, and others) send to websites. It aggregates anonymized data from 2,600+ Google Analytics properties to show overall trends, per-source market share, and industry breakdowns.

Connect your Google Analytics property to Trakkr to see exactly how much traffic ChatGPT, Claude, Gemini, Perplexity, and other AI platforms send to your site. Trakkr automatically categorizes AI referral traffic, shows per-source breakdowns, and benchmarks you against industry averages.