Correct. Click-based attribution captures roughly 5 to 10 percent of the real influence of AI search. We deploy a three-layer model that we can implement in 24 hours:
Layer one: a GA4 custom channel group with the AI platform hostnames (chatgpt.com, perplexity.ai, gemini.google.com, copilot.microsoft.com, claude.ai, grok.x.ai). This catches the clicks that do happen.
Layer two:a mandatory free-text "How did you hear about us?" field on every conversion form, auto-categorized into your CRM via Make.com or n8n plus the OpenAI API. Free-text beats dropdowns. Drop-off is one to three percent.
Layer three:a required "Verbal Source (Sales-Reported)" CRM field that gates deal progression past discovery, plus optional Gong or Chorus keyword alerts.
A typical pattern: the CRM shows 2 percent of revenue from AI search on click data alone, while self-reported sources show 15 to 20 percent. Same business, roughly nine times more truth. At 50 leads per month you reach statistical significance in about two weeks.